...................
...................
CI/SfB (37.4)
Uniclass L414
November 2011
NATURAL DAYLIGHT SOLUTIONS
New
low profile
glazing
...................................................................
.......................................
NATURAL
. . . . . . . . . . . . . .DAYLIGHTING
.........................
P
assivent market a range of natural
daylighting products including
tubular rooflights, conventional
rooflights, combined rooflight/ventilators
and hybrid lighting systems.
Advantages
● Highly effective at delivering light into
internal and badly-lit spaces without
windows.
● Energy saving - reduces the need for
artificial lighting.
● Wide range of applications - houses, flats,
schools, hospitals, commercial, industrial
buildings, care homes, nursing homes and
student accommodation.
● Suitable for both new-build and
refurbishment projects.
● Meet the thermal requirements of the
latest building regulations.
● Hybrid natural and artificial lighting
solutions.
Sustainability
The sun is a sustainable light source, and
natural daylight can make a significant
contribution to sustainable building design.
Rooflights are an effective and efficient
means of maximising natural daylight in
dark areas, often virtually eliminating the
need for supplementary electric lighting
during the day.
Passivent natural daylight systems, used as a
complement to artificial lighting, can
considerably reduce the annual energy
consumption of any building, thereby
reducing CO2 emissions.
Proven benefits of natural light
Scientific studies have shown the positive
benefits of natural daylight for health and
wellbeing in a range of applications.
The CIBSE Office Lighting Guide states that
Natural Daylight is an almost universal
worker requirement. When given a choice,
most people prefer a working environment
with daylight to one without. It references
documented evidence confirming that
excluding daylight leads to increased
numbers of complaints about the working
environment, and may adversely affect
productivity. The Daylight Workplace
Regulations state that “The lighting in every
workplace shall, as far as is reasonably
practical, be by natural light.”
BRE Environmental Assessment Method
The benefits of natural daylighting are
recognised by the Building Research
Establishment (BRE) Environmental
Assessment Method (BREEAM).
BREEAM Modules cover Schools, Offices,
Healthcare, Retail and Industrial buildings.
These buildings are then rated on a scale of
PASS, GOOD, VERY GOOD or EXCELLENT.
Passivent natural daylight systems can
contribute to the credits available under the
Health and Wellbeing Section HW01 and the
Energy Section E01.
2
.......................................
.................................................
..........................
NATURAL DAYLIGHT SOLUTIONS
PRODUCT RANGE
...........................................................................................
Tubular and square ducted rooflights
Sunscoop™ tubular rooflights
Used to bring natural daylight into internal
rooms and spaces that have no, or
insufficient, windows. Natural daylight
enters through a roof-mounted dome or
skylight and is reflected down a mirrored
tube/duct and into the room below through
a ceiling-mounted diffuser. Particularly
useful for rooms and spaces below another
room or a pitched roof. Also available with
occupant sensor and a daylight controller for
integrated low energy artificial lighting.
A combined light and ventilation unit
(Sunscoop iPSV) is also available.
Natural daylighting
2
Sunscoop tubular rooflight systems
4
Sunscoop iPSV light & ventilation
10
Sunscoop square ducted
11
Sunscoop hybrid
12
Metrodome modular rooflights
13
Sunstract rooflight/ventilator
16
Litevent Airstract rooflight/ventilator
18
Further information
20
Sunscoop square ducted rooflights
Square systems of a larger size retaining the
features of the tubular systems.
Sunscoop hybrid
A unique, automatic and energy saving
system combining natural daylight and
luminaire to achieve more consistent
illuminance irrespective of external
conditions
Metrodome modular rooflights
An all-aluminium rooflight and access hatch
range offering ventilation options and
thermal efficiency. Designed for both new
build and refurbishment applications.
Particularly suitable for refurbishment, since
non standard sizes can be made to suit
existing roof openings and kerbs.
Combined rooflight/ventilator systems
Sunstract
Combined natural controllable ventilation
and natural daylighting functions in one
unit. Suitable for high ventilation capacities
and for providing light to lower floors using
highly reflective light ducts.
Litevent Airstract
Combines natural controllable ventilation
and natural daylighting functions in one
unit.
For installation on flat or low-pitched roofs,
the upstand will accommodate both warm
and cold deck constructions without the
need for an additional timber kerb.
...........................................................................................
3
.......................................
.......................................
S
unscoop™ Tubular Rooflight systems are
used to bring natural daylight into
internal rooms and spaces that have no, or
insufficient, windows.
Sunscoop Tubular Rooflights consist of a
roof-mounted clear polycarbonate dome or
skylight connected to a tube with an internal
mirrored finish with 98% reflectance.
Natural daylight enters the dome or skylight
and is reflected down the tube and into the
room through a ceiling-mounted diffuser.
Sunscoop advantages
● Highly effective at delivering light into
internal and poorly lit spaces.
● System design and performance are backed
by an unrivalled programme of research.
● Energy saving - reduces the need for
artificial lighting.
● Natural daylight has positive benefits over
artificial lighting.
● Wide range of applications - houses, flats,
schools, hospitals, commercial and
industrial buildings.
● Range of sizes for different requirements.
● Simple and reliable installation.
● Can be used on pitched and flat roofs.
● Adjustable elbows give flexibility of siting
on tubular systems.
● Complete system meets the thermal
requirements of the latest building
regulations.
● Sunscoop daylighting performance
software calculations available.
● Sunscoop Hybrid systems available,
combining natural and artificial lighting
with integrated intelligent controllers.
Silsoe Research
Institute report
4
.......................................
.................................................
..........................................
NATURAL DAYLIGHT SOLUTIONS
. . . . . . . . . . . . . . . . . . . . . . . . . . . .SUNSCOOP
. . . . . . . . . . . . . . . . .TUBULAR
. . . . . . . . . . . . .ROOFLIGHT
. . . . . . . . . . . . . . . . .SYSTEMS
.................................
™
PERFORMANCE
Unique test programme
The performance of the Sunscoop Tubular
Rooflight system has been firmly established
by a unique and extensive period of testing,
unparalleled in the tubular rooflight
industry, carried out by Silsoe Research
Institute (SRI) and BPD. Measurements were
taken over four to six month periods during
the summer/ autumn in all natural light
conditions ranging from bright clear skies to
overcast conditions.
Internal view of different
diameter tubular
rooflights under test
This comprehensive monitoring has for the
first time provided accurate, realistic and
reliable performance data for tubular
rooflight systems including direct and
diffuse lighting conditions.
The research is subject of a published paper
entitled “Optimisation & design of ducted
daylight systems: 2010” which is specific to
Passivent systems only.
External lux sensor with
shade ring for measuring
diffused light levels
Typical light levels
The light output from the Sunscoop system
depends on the size and length of tubing,
offset angles if any, the external sky
conditions and light levels measured in lux.
The distribution of the light in the room
depends on the diffuser type and the wall,
ceiling and floor reflectances.
A sophisticated in house computer
programme has since been developed to
accurately predict light levels of Sunscoop
systems, based directly on the SRI and BPD
monitoring.
Monitoring of three
tubular rooflights
simultaneously
Siting
Where possible the roof-mounted glazing
should be located on a south-facing slope to
gain the maximum amount of daylight
under both direct and diffuse conditions.
Factors which need to be considered when
siting a Sunscoop include:
- Location of the room to be lit and suitable
position of the ceiling diffuser.
- Roof space obstructions.
- Proximity of other buildings, trees etc,
which may cast shadows at certain times
of the day or year.
SUNSCOOP™ BUILDER SOFTWARE
Passivent Sunscoop & Airscoop Builder has been purpose
designed to interface with EDSL’s established Tas building
thermal analysis tool, which is the first dynamic simulation
modeling (DSM) of its kind to be approved for both Building
Regulation Approved Document L2 and the Energy
Performance Certificate. The Passivent programme adds a
further dimension to the Tas Building Designer system, which
already calculates performance taking into account the longterm dynamics affecting the building according to its location
and orientation.
Passivent Sunscoop Builder enables users readily to model the
building daylight factor to BRE methodology, taking account of
Passivent Sunscoops and Sunstracts. It also enables calculation
of the number and size of Sunscoops required to achieve a given
internal illuminance, enabling their associated impact on
energy and carbon performance to be assessed
System layout
Sunscoop systems can pass through a roof
space or other void.
For maximum effectiveness the tubing
should be as straight as possible. However,
since it is often impractical to site the ceiling
diffuser directly below the roof-mounted
glazing, the tubing system allows an offset
by means of an elbow. It is adjustable up to
30º from vertical.
Other elbows can be used but monitoring
has shown that these will adversely affect
performance.
..........................................................................................................
5
.........................
.........................
NATURAL DAYLIGHT SOLUTIONS
. . . . . . . . .SUNSCOOP
. . . . . . . . . . . . . . . . TUBULAR
. . . . . . . . . . . . . .INSTALLATION
............................
™
Sunscoop on flat roof
Low profile
polycarbonate glazing
Single skin aluminium
upstand
Insulation by others
98% reflective tubing
with insulation
Ceiling diffuser
Sunscoop on pitched roof
Traditional skylight, polyester
powder coated aluminium frame
with polycarbonate glazing
Roof flashing with
AluFlash attached
Square to round adaptor
with integral elbow
98% reflective tubing
Sunscoop on standing seam roof
Low profile
polycarbonate glazing
Site-fabricated
insulated upstand
98% reflective tubing
Adjustable elbow to 30°
Insulation by others
For more information on installation details please
contact Passivent Technical Services.
6
...................................................................
..........................
..........................
NATURAL DAYLIGHT SOLUTIONS
. . . . . . SUNSCOOP
. . . . . . . . . . . . . . . . . TUBULAR
. . . . . . . . . . . . . .ROOF
. . . . . . . . INTERFACE
......................
™
250mm diam. tube
350mm diam. tube
450mm diam. tube
530mm diam. tube
Roof interface flashings
A range of dedicated roof flashings is
available for different types of pitched and
flat roof coverings, as shown below.
?
?
?
?
?
?
?
?
?
?
?
?
?
?
?
?
?
?
?
?
Pitched roof flashings
Universal Slate
Universal Tile (All types) ●
Universal Standing seam ●
Traditional Slate
Traditional Tile
?
?
?
?
?
?
?
?
?
?
?
?
Flat roof flashings
Universal Single Ply
Universal Torch on
Universal Standing seam ●
●
Pitched roof flashings
Universal Tile on plain tiles
Requires a site-fabricated upstand.
Health and safety
The Sunscoop glazing and flashings have
been impact-tested to BS EN 1873 Modular
Rooflights and may be deemed to be nonfragile for HSG33 Safety in Roofwork.
Universal slate on pitched roof
The Sunscoop glazing and flashings have an
AA fire rating to BS 476: Part 3: 2004, and
can therefore be used on roofs without
restriction on number, spacing or position.
Universal tile on pitched roof
Traditional skylight
Flat roof
Specification clause
Natural daylight to …
rooms to be provided by
means of Passivent
Sunscoop tubular / square
ducted* systems
comprising:
Roof-mounted low profile
glazing of 3.0mm clear
uv-stabilised
polycarbonate covered by
10-year warranty against
loss of impact strength,
excessive yellowing and
loss of light transmission.
Roof interface flashing to
be ...
To have AA fire rating to
BS 476: Part 3; 2004.
Tubes and elbows to be
SR98 Mirror with
reflectance 98% and
25-year warranty.
System diameter: 250mm
/ 350mm / 450mm /
530mm / 885mm.*
Circular recessed ceiling
diffuser of diffused
polycarbonate with whitecapped ABS ceiling ring /
chrome / brass effect /
Skyview diffuser circular /
Skyview diffuser square.*
Options to be fitted:
Polycarbonate secondary
glazing skin, integral
electric light fitting, lightattenuating damper, fire
protection collar.*
All exposed tubes and
elbows within unheated
voids to be wrapped with
tube insulation. System to
achieve an overall U-value
of 2.2W/m2K.*
Supplier: Passivent Ltd,
North Frith Oasts,
Ashes Lane, Hadlow.
Kent TN11 9QU
Telephone: 01732 850770,
Fax: 01732 850949.
Email:
projects@passivent.com
Sales: Passivent Ltd.
2 Brooklands Road, Sale.
Cheshire M33 3SS
Telephone: 0161 905 5700,
Fax: 0161 905 2085.
Email:
sales@passivent.com
*delete as applicable
+ Square ducted systems
only
Universal single ply on flat roof
...................................................................
7
.........................
................................................
NATURAL DAYLIGHT SOLUTIONS
. . . . . . . . .SUNSCOOP
. . . . . . . . . . . . . . . . .TUBULAR
. . . . . . . . . . . . . COMPONENTS
....................................................
™
Roof-mounted glazing
Sunscoop glazing is manufactured from
3.0mm clear uv-stabilised polycarbonate
with 92% light transmission.
The glazing is available in two types;
Square dome fitted to a builders kerb or
supplied insulated upstand.
Traditional skylight fitted within tile and
slate coverings. For further information see
page 7.
Tubes and elbows
Tubes and elbows are anodised aluminium
with a multi-layer specular coating which
ensures pure white light with no colour
shift, even after multiple reflections down
the light tube / shaft. The material called
SR98 Mirror incorporates a pure super silver
layer and has a total reflectance of 98%.
Anodised aluminium base material
Bonding layer
Both have a 10-year warranty (supported by
the polycarbonate manufacturer) against
loss of impact strength, excessive yellowing
and loss of light transmission.
Pure super silver or pure aluminium layer
Super reflective (LR) oxide layer
Super reflective (HR) oxide layer
The warranty also covers any effects of the
forming process. Not all manufacturers offer
this warranty.
Polycarbonate secondary glazing is also
available to maximise insulation levels along
with the use of tube insulation (supplied
separately).
The multi-layer optical coating system is
atomically bonded to the substrate.
Laminated or glued reflective sheets are not
used.
It has a 25-year product warranty which
guarantees that the material will not splinter,
yellow, darken, peel off, blister, crack or
develop any other surface degradation which
could reduce overall reflectivity, even after
prolonged uv exposure. The finished materials
are electrostatically neutral and will not
attract airborne dust even during installation.
Universal tile on plain tiles
Universal slate on pitched roof
Sizes
Tubular systems diameter:
250mm, 350mm, 450mm, or 530mm.
Starter tube length: 300mm.
Elbow adjustment: up to 30°.
Intermediate tube: 600mm.
Can be cut as required on site.
Square systems: 885 x 885mm (see page 11)
8
...........................................................................................
..........................................................................................
...........................................................................................
Integral electric light fitting
The Sunscoop can be supplied with an
optional integral electric light fitting (two on
450 and 530mm systems) which takes a 13W
or 20W low-energy lamp (equivalent to a
65W or 100W conventional lamp). This
avoids the need for an additional light fitting
for night-time use.
Light-attenuating dampers
Control over the light level entering the
room may be required at certain times, for
example in conference rooms, lecture
theatres, classrooms and hospital wards.
Ceiling diffusers
Circular ceiling diffuser
The standard recessed ceiling diffuser for all
tube sizes, designed to maximise light
transmission. Its translucent surface
provides privacy and spreads the light
efficiently throughout the room.
Manufactured from diffused polycarbonate
with white-capped ABS ceiling ring to hide
fixings. Also available in chrome or brass
effect finish.
The optional Sunscoop motorised lightattenuating damper provides this control; it
is actuated from a wall switch, separately
available.
Fire protection collars
In longer Sunscoop systems the tubing may
pass through an intermediate floor or ceiling
that provides fire separation. As with any
ducted system it is important that it does not
form a path for fire.
Fire protection collars providing up to 120
minutes fire resistance to BS 476: Part 20:
1987 are available for all sizes of Sunscoop
Skyview diffuser, circular
Optional for all tube sizes. The innovative
Skyview diffuser consists of a grid of fresnel
lenses which provides a wider spread of light
without excessive losses and enables the sky
to be viewed.
Tube Insulation (supplied separately)
Specifically designed to contribute to the
overall thermal performance of the system.
All exposed tubes and elbows within
unheated voids should be lagged with tube
insulation to reduce heat loss and the risk of
condensation within the tube.
Thermal insulation
Our Technical Services Department can
provide computer calculations of U-values in
different roof constructions using Sunscoop
rooflights, including the use of secondary
glazing skins and/or tube insulation, to
comply with Building Regulations Part L
2010.
Skyview diffuser, square
Optional for 450mm and 530mm tube only.
Similar to the circular Skyview but mounted
in a 600 x 600mm polycarbonate panel
which can be fitted in a suspended ceiling.
...........................................................................................
9
..........................................
..........................................
NATURAL DAYLIGHT SOLUTIONS
. . . . . . . . . . . . .SUNSCOOP
. . . . . . . . . . . . . . .iPSV
. . . . . . . . COMBINED
. . . . . . . . . . . . . . . .LIGHT
. . . . . . . . .&
. . .VENTILATION
. . . . . . . . . . . . . . . . . . UNIT
...................
™
T
he Passivent Sunscoop iPSV™ system is
designed to provide both natural daylight
and ventilation to bathrooms, toilets,
kitchens, en suites and other similar areas,
in both domestic and commercial
applications.
Natural daylight enters through a roof
mounted dome and is reflected down
the highly reflective tubing through
a Skyview ceiling diffuser. This innovative
diffuser consists of a grid of fresnel lenses
which provides a wider spread of light
without excessive losses and enables the sky
to be viewed.
Ventilation is controlled by the ‘intelligent’
extract operated by a series of nylon bands,
which respond to humidity levels and
regulate the size of the air opening.
TT9 Versatile tile ventilator
Utilising a separate ducting system allows
optimum performance from both units - the
shortest possible length to maximise natural
daylight through the ceiling diffuser and a
separate duct for the extract to optimum
length for the stack effect.
Low profile glazing on
Universal tile flashing
Flexible ducting
(support and insulation
omitted for clarity)
Ceiling (insulation omitted for clarity)
10
SR 98 Mirror reflective tube
guides daylight down to the
ceiling diffuser (insulation
omitted for clarity)
Key features
● No electrical connection or power source
is required so the system is naturally
energy efficient.
● Intelligent humidity controlled extract
responds automatically to changes in
relative humidity giving greater
ventilation when humidity is high whilst
preventing unnecessary ventilation and
heat loss when humidity is low.
● 24 hour condensation control with gentle
extraction - operates all day and every day
as required combating condensation and
mould growth.
● Completely silent in operation.
● Complies with the requirements of
Approved Document F.
● Minimal maintenance - no mechanical
components to go wrong. No costly solar
panels or battery backups.
● Automatic response and no operating
controls, ideal for special needs
applications.
● Tests by Building Research Establishment
(BRE) have shown an intelligent passive
stack system incorporating a humidity
sensitive extract gives a 15 - 40% saving
in ventilation heat loss dependent on
occupancy levels.
● Thermal modelling by De Montfort
University has shown that the intelligent
passive stack system operates effectively
even in summer months and internal
bathrooms. The research also
demonstrated effectiveness even in very
airtight dwellings.
● Can be supplied with optional integral
electric light fitting which takes a low
energy bulb to avoid the need for
additional light fitting for night time use.
Size
250mm diameter Sunscoop Ventilation unit
area provides 12,270mm2 at maximum
humidity with 125mm ducting.
Combined extract ventilator
and Skyview diffuser
....................................................................................................
.........................
.........................
NATURAL DAYLIGHT SOLUTIONS
. . . . . . . . . . . . . .SUNSCOOP
. . . . . . . . . . . . . . . . .SQUARE
. . . . . . . . . . . .DUCTED
........................
™
T
he Sunscoop™ square ducted shares
many of the features of the tubular
systems and incorporates additional features
to accommodate the system’s larger size. It
provides high levels of natural daylight over
longer lengths, meaning the product can
contribute to the reduction of energy
demand in commercial buildings.
Roof mounted diffused
polycarbonate glazing
Pitch dedicated and
colour matched
weathering skirt
Insulated structural
sub base
Key features
● 885mm square ducted system for greater
structural stability and light output.
98% reflective ducting
guides daylight down
to the ceiling adapter
● Structural sub-base provided for ease of
installation and weathering into a wide
range of roof coverings.
● Diffused glazing reduces ‘hot spots’ and
spreads the light for ducting down the
system.
● Wind load tested up to 51m/s.
● Can be used in flat or pitched roofs with
pitch-dedicated colour matched
weathering skirt.
● Reduces the need for artificial lighting,
also reducing energy costs.
● Thermally insulated upstand to minimise
energy losses.
● Single or double glazing to minimise heat
loss.
Composition
3mm to 4mm polycarbonate double or triple
skin diffused glazing, formed with a dome or
pyramid finish. Glazing has a 10 year
postformed warranty from the sheet supplier
against yellowing and loss of light
transmission, and for impact resistance.
Ceiling adaptor
with adjustable
sleeve
Ceiling diffuser
External grade plywood structual sub-base
lined with 98% reflective material. The sub
base offers a secure roof fixing up to 51m/s
wind speed and is independently tested by
the BRE.
Modular duct lengths: 750mm, 500mm and
250mm.
The ceiling diffuser has an adaptor with an
adjustable sleeve to accommodate variations
in final duct length.
...................................................................
11
.........................
.........................
NATURAL DAYLIGHT SOLUTIONS
. . . . . . . . . . . . . . . . . . . .SUNSCOOP
. . . . . . . . . . . . . . . . .HYBRID
..............................
™
T
he Sunscoop™ hybrid is a 350mm unit
with a daylight controlled dimmable low
energy compact fluorescent luminaire
integrated into the ceiling diffuser assembly
to provide a more consistent light level
despite changing external daylight
conditions.
The CIBSE Lighting Guide 10 - Daylighting
states that: “Case studies have shown that in
a conventionally daylit commercial building
the choice of control can make 30-40%
difference to the resulting light use”.
The Sunscoop hybrid has a control unit
which controls both occupancy and daylight
levels, maximising the energy savings from
lighting.
Key features
● The Sunscoop hybrid incorporates a light
sensor which is programmed to turn on
when the light level inside the room drops
below a certain level.
● Luminaire turns on with optional ‘soft
start’, allowing a gradual increase in light
output and adjustment to the required
level.
● The Sunscoop hybrid incorporates a
lighting controller, lux sensor and PIR
presence detector.
● When the unit determines there is
adequate natural light available, the lamp
is automatically turned off.
● When light levels fall, the lamp is
switched back on and its output continues
to be regulated by the daylight sensor.
● The programmable PIR presence detector
will turn off the lamp when the space is
unoccupied irrespective of the light level.
Ceiling Diffuser / Luminaire
The unit comprises a 350mm standard
diffuser with option for Skyview type. The
adjacent luminaire features a white powder
coated spun aluminium bezel and a diamond
faceted vacuum metallised aluminium
reflector housing a dimmable 26W compact
fluorescent lamp. Sensor and control gear
are pre-fitted.
Sizes
350mm diameter unit contains one
downlight, which at full capacity produces
an output of 1800 lumens.
Appearance
White ABS ceiling diffuser ring to
encompass both Sunscoop diffuser and
downlight assembly.
Performance
The sensor which is looking directly
downward continously monitors the light
level reflected back to the ceiling and
regulates the output of the compact
fluorescent lamp to maintain an approximate
pre-determined light level. Setting the predetermined light level requires the unit to be
commissioned by a Passivent Mastercare
Installer.
Note: Since daylighting and room conditions
can change continuously, the lighting level
achieved may vary to some extent from the
pre-set level.
12
...................................................................
Specification clause
Natural daylight and
artificial lighting to …
rooms to be provided by
means of Passivent
Sunscoop hybrid system
comprising:
Roof-mounted low profile
glazing of 3.0mm clear
uv-stabilised
polycarbonate covered by
10-year warranty against
loss of impact strength,
excessive yellowing and
loss of light transmission.
Roof interface flashing to
be ...
To have AA fire rating to
BS 476: Part 3; 2004.
Tubes and elbows to be
SR98 Mirror with
reflectance 98% and
25-year warranty.
System diameter: 350mm
Circular recessed ceiling
diffuser of diffused
polycarbonate with whitecapped ABS ceiling ring /
Skyview circular diffuser*
incorporating daylight
controlled low energy
compact fluorescent
luminaire, lighting
controller, lux sensor and
PIR presence detector.
Options to be fitted: Light
and sun deflector (LSD),
polycarbonate secondary
glazing skin, lightattenuating damper, fire
protection collar.*
All exposed tubes and
elbows within unheated
voids to be wrapped with
tube insulation. System to
achieve an overall U-value
of 2.2W/m2K.*
Supplier: Passivent Ltd,
North Frith Oasts,
Ashes Lane, Hadlow.
Kent TN11 9QU
Telephone: 01732 850770,
Fax: 01732 850949.
Email:
projects@passivent.com
Sales: Passivent Ltd.
2 Brooklands Road, Sale.
Cheshire M33 3SS
Telephone: 0161 905 5700,
Fax: 0161 905 2085.
Email:
sales@passivent.com
*delete as applicable
...............
NATURAL DAYLIGHT SOLUTIONS
METRODOME
MODULAR
. . . . . . . . . . . . . . ROOFLIGHTS
..................
M
etrodome is an all-aluminium rooflight
range offering ventilation options and
thermal efficiency, with a choice of triple or
double skin polycarbonate glazing. Suitable
for new-build or refurbishment, on both
warm and cold deck flat or low-pitched roofs.
Non-standard sizes can be made to suit
existing roof openings and kerbs. Access
hatches are also available.
Key features
● All-aluminium design incorporating
double skin upstand.
● Thermally enhanced glazing frame
providing a high level of security.
● Driving rain resistant.
● Independently impact tested, may be
deemed non-fragile.
● Standard or humidity-sensitive trickle
ventilation options.
● Available triple or double glazed.
● Rooflights can be manufactured to suit
non-standard roof openings.
Accessories
A range of complementary rooflight
accessories is available, including:
● Metroglazing triple or double skin
polycarbonate domes and pyramids in
clear, diffused or bronze, for fitting
directly to builder’s kerbs.
● Tamper proof security fixings supplied
separately.
● Manual opening operating poles.
● Anti-vandal/security bars available, please
consult Passivent Technical Services for
further details.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
..........................................
................................................
NATURAL DAYLIGHT SOLUTIONS
. . . . . . . . . . . . . . . . . . . . . . . . . METRODOME
. . . . . . . . . . . . . . . . . . . MODULAR
. . . . . . . . . . . . . . .ROOFLIGHTS
... .............................................
Roof interface
Passivent rooflights can be supplied for
fitting either directly on the roof deck, or on
a builder’s kerb (usually made on site).
Triple skin
polycarbonate glazing
In new build, an integral upstand is the
favoured choice as it provides a prefinished
internal skin and an exterior to accept the
roof covering. In refurbishment, a builder’s
kerb will often already exist.
Upstand
Metrodome is supplied with an integral
upstand for fitting directly to the roof deck,
or with an additional weathering flange at
the base of the upstand for fitting to a
builder’s kerb. The upstand is manufactured
from double skin mill finish aluminium with
an insulated core, mitred and welded at
corners. The internal face is finished white
for maximum light reflectance.
Aluminium frame
DV4 Delta ventilator
Insulated aluminium
upstand
Metrodome fixed closed, fitted direct to
roof
Roof opening size
Triple skin
polycarbonate glazing
Glazing
Triple or double skin polycarbonate with
vented air gap, in extruded mill finish
aluminium frame with mitred and welded
corners. Available in clear, diffused or bronze
glazing in dome or pyramid shapes.
The glazing comes with a 10 year postformed
warranty supported by the polycarbonate
manufacturer against loss of impact
strength, excessive yellowing and loss of
light transmission.
Aluminium frame
ES4 Energy Saver
ventilator
Insulated aluminium
upstand with weathering
flange
Metrodome fixed closed, on builder s kerb
Roof opening size
Opening
Available either fixed closed, manual opening
or electric opening. Opening options open to
a height of 300mm. For rapid ventilation
areas available see table opposite.
Internal lining to lightwell
Overall kerb size
Metrodome sizes
Manual opening
Electric opening
Note: the finished builder’s kerb should not be
less than 75mm ±5mm in width to provide
adequate fixing for the rooflight upstand.
Roof opening size
(mm x mm)
Daylight
area (m2)
Max. opening
area (m2)
600 x 600
750 x 750
900 x 600
900 x 900
1050 x 750
1050 x 1050
1200 x 900
1200 x 1200
1350 x 750
1350 x 1050
1350 x 1350
1650 x 1200
1650 x 1350
1950 x 1350
0.135
0.270
0.303
0.448
0.426
0.672
0.650
0.941
0.582
0.918
1.524
1.377
1.590
1.926
0.139
0.274
0.251
0.412
0.415
0.499
0.502
0.596
0.506
0.588
0.684
0.732
0.774
0.864
14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
..........................................................................................
...........................................................................................
Thermal insulation
The insulated upstand and double or triple
skin glazing, with vented air gap, give good
thermal insulation and minimise the risk of
condensation.
The overall calculated U-value for a 600 x
600mm unit with triple glazing and upstand
is 1.99W/m2K.
Passivent Technical Services Department can
provide computer calculations of U-values
for given rooflight sizes in different flat roof
constructions to comply with Building
Regulations Part L 2010. The calculated
U value will vary with the size of rooflight,
due to the changing ratios of upstand,
glazing and frame area.
METRODOME ROOF ACCESS HATCH
Description
Metrodome Roof Hatches provide access to a
roof from inside a building. The construction
is similar to the standard rooflight but the
top opens to 90° and is supported by twin
‘slip and stick’ gas struts. Tops are available
either glazed or insulated aluminium.
An internal latch retains the top when closed
and can be secured with a padlock (not
supplied). These units are not available for
builder’s kerbs.
Size
The access hatch is available in the following
sizes: 900 x 900, 1050 x 1050, 1200 x 900 and
1200 x 1200mm.
Internal and external fire spread (B2/B4)
The internal surfaces of the rooflight
upstand and frame are non combustible and
would achieve a Class 1Y rating when tested
to BS 476: Part 7: 1987.
Insulated aluminium lid (or may be glazed)
Polycarbonate glazing a minimum of 3.0mm
thick with a Class 1 rating is deemed by
Building Regulations Approved Document
B4 to be rated AA.
Gas strut
Metrodome rooflights can therefore be used
without restriction on size or spacing in all
types of room and circulation space, except
protected stairways.
Specification clause
Delete items not required
Rooflights to be Passivent
Metrodome, manufactured
to BS EN ISO 9001
Supplier: Passivent Ltd,
North Frith Oasts,
Ashes Lane, Hadlow.
Kent TN11 9QU
Telephone: 01732 850770,
Fax: 01732 850949.
Email:
projects@passivent.com
Sales: Passivent Ltd.
2 Brooklands Road, Sale.
Cheshire M33 3SS
Telephone: 0161 905 5700,
Fax: 0161 905 2085.
Email:
sales@passivent.com
Sizes: .....
Glazing: double/ triple
skin polycarbonate with
ventilated air gap in
extruded mill finish
aluminium frame with
mitred and welded
corners.
Colour: clear/ diffused/
opal/ bronze.
Shape: dome/ pyramid.
Roof deck upstand:
205mm high with
insulated core, mitred and
welded corners.
Builder’s kerb upstand:
160mm high with
insulated core, mitred and
welded corners.
Opening: fixed closed/
manual opening/ electric
opening to height of
300mm.
Ventilation: ..... DV4 Delta
adjustable ventilators/ ES4
humidity controlled
ventilators fitted to
rooflight upstand.
Internal fire spread rating
Class 1Y, external fire
spread designation AA.
Latch mechanism
Weather resistance
Metrodome rooflights are deluge and driving
rain resistant as demonstrated by test.
Non-fragility
Metrodome rooflights meet the highest level
of impact resistance (1200 joules) to draft
standard BS EN 1873 in BRE tests, and may
be considered non-fragile under the latest
guidelines of HSG33 ‘Health and safety in
roof work’.
...........................................................................................
15
.........................
...............................................
NATURAL DAYLIGHT SOLUTIONS
. . . . . . . SUNSTRACT
. . . . . . . . . . . . . . . . . . ROOFLIGHT
. . . . . . . . . . . . . . . . ./.VENTILATOR
................................................
™
T
he Sunstract™ combines controllable
natural ventilation with the ability to
provide natural daylight, meaning the
product can contribute to the reduction of
energy demand in commercial buildings.
Composition
3mm to 4mm polycarbonate double or triple
skin glazing, formed with a dome or pyramid
finish. Glazing has a 10 year postformed
warranty from the sheet supplier against
yellowing and loss of light transmission, and
for impact resistance.
External weather louvres manufactured from
extruded aluminum with a 30mm pitch.
Insulated controllable louvres with 24V
modulating actuators.
External grade plywood structual sub-base
lined with 98% reflective material.
The sub-base offers a secure roof fixing up to
51m/s wind speed and is independently
tested by the BRE.
A frosted recessed diffuser suspended within
the ceiling adaptor has an adjustable sleeve
to accommodate variations in final duct
length. Suitable for use in plasterboard and
suspended ceilings.
Key features
● Combines natural ventilation and natural
daylighting functions in one unit.
● Provides controllable ventilation with
high lumen output.
Performance
The ventilation area of the Sunstract system
is 0.5m2.
The overall calculated U-value for a
Sunstract terminal with double glazed top is
2.06W/m2K.
● 885mm square ducted system for greater
structural stability and light output.
● Structural sub-base provided for ease of
installation and weathering into a wide
range of roof coverings.
● Diffused glazing reduces ‘hot spots’ and
spreads the light for ducting down the
system.
● Reduces the need for artificial lighting or
ventilation, also reducing energy costs.
● Thermally insulated upstand to minimise
energy losses.
● Double or triple glazing to minimise heat
loss.
Specification clause
Natural daylight and
ventilation to … rooms to
be provided by means of
Passivent Sunstract
system comprising:
Roof-mounted unit
incorporating triple /
double glazed dome /
pyramid* of 3.0mm clear
uv-stabilised
polycarbonate covered by
10-year warranty against
loss of impact strength,
excessive yellowing and
loss of light transmission.
Aluminium double bank
weather louvres to achieve
100% rain rejection to BS
EN 13030:2001.
Controllable insulated
louvres on 4 sides to
provide ventilation area of
0.5m2
To have AA fire rating to
BS 476: Part 3: 2004.
Duct sections to be 750 /
500 / 250mm to be SR98
Mirror with reflectance
98% and 25-year warranty.
System size: 850mm
square
Recessed ceiling diffuser
of diffused polycarbonate
within ventilated ceiling
adaptor incorporating
adjustable sleeve.
All exposed ducting within
unheated voids to be
wrapped with tube
insulation. Sunstract
terminal will achieve an
overall U-value of
2.03W/m2K.*
Supplier: Passivent Ltd,
North Frith Oasts,
Ashes Lane, Hadlow.
Kent TN11 9QU
Telephone: 01732 850770,
Fax: 01732 850949.
Email:
projects@passivent.com
Sales: Passivent Ltd.
2 Brooklands Road, Sale.
Cheshire M33 3SS
Telephone: 0161 905 5700,
Fax: 0161 905 2085.
Email:
sales@passivent.com
*delete as applicable
Sunstract system under test in real daylight conditions
with integrator box at base
16
...........................................................................................
........................................................
Internal mirrored louvres
...................
Roof mounted diffused
polycarbonate double
or triple glazing
...........
Insulated
controllable
louvres
Aluminium
external
weather
louvres
Insulated
structural
sub base
98% reflective
ducting guides
daylight down
to the ceiling
adaptor
Ceiling adaptor
(white
internal) with
adjustable
sleeve
Light diffuser
Terminal top cutaway
Aluminium external
weather louvres
Secondary weather baffles
Insulated controllable
louvres in closed position
.........................................................
Looking up the Sunstract shaft with the ceiling diffuser removed.
17
.........................
................................................
NATURAL DAYLIGHT SOLUTIONS
.LITEVENT
. . . . . . . . . . . . . . AIRSTRACT
. . . . . . . . . . . . . . . . ROOFLIGHT
. . . . . . . . . . . . . . . . ./.VENTILATOR
..........................................
T
he Litevent combines a controllable
ventilator and a rooflight, for installation
on flat or low-pitched roofs. It is designed to
contribute to reduction of energy demand in
commercial buildings.
Key features
● Combines natural ventilation and natural
daylighting functions in one unit.
● Provides controllable ventilation with
minimal energy consumption.
Appearance
Aluminium upstand and glazing frame are
mill finish as standard. Frame can be
supplied polyester powder coated to order.
Cowl is aluminium, mill finished as
standard.
Glazing is clear, diffused or bronze.
Shape: pyramid or dome.
Internal surfaces finished in white for
maximum light reflectance.
● Reduces the need for artificial lighting,
thereby further reducing energy
expenditure.
● Thermally insulated upstand and double
skin glazing minimise heat loss.
● Height of upstand will accommodate both
warm and cold deck constructions
without the need for an additional timber
kerb.
Composition
Aluminium upstand with insulated core,
incorporating insulated ventilation doors on
all four sides, controlled by linked actuators
(24V dc or 240V ac). Weather cowl is mill
finish aluminium, and has an aluminium
insect screen.
Rooflight has triple or double skin 3mm to
4mm polycarbonate glazing with vented air
gap, in an extruded aluminium frame with
mitred and secret-welded corners. Glazing
has a 10-year postformed warranty from the
material sheet supplier against yellowing and
loss of light transmission, and for impact
resistance.
Sizes
Litevent size*
(mm x mm)
Daylight area
(m2)
Ventilation area
(m2)
600 x 600
750 x 750
900 x 900
1050 x 1050
1200 x 1200
900 x 600
1200 x 600
1200 x 900
0.270
0.448
0.672
0.941
1.254
0.426
0.582
0.918
0.350
0.405
0.441
0.496
0.551
0.396
0.451
0.496
*Roof opening size
18
...........................................................................................
....................................
.............................................
Triple or double skin
polycarbonate glazing
on aluminium frame
..................
.......
Weather protection
cowl
Ventilation door
4mm insect screen
Insulated aluminium upstand
Lining to lightwell (by others)
PERFORMANCE DATA
Ventilation performance
Maximum ventilation area: see sizes table.
Passivent can advise on size of Airstract
terminal in relation to volume of air
movement required, likely external
conditions and internal temperatures.
Data from independent testing is available
on request.
Impact strength
The unit has been subjected to large soft body
impact testing by BRE and may be considered
non-fragile to HSG 33. It will resist a soft-body
impact of at least 1200 Joules.
Fire spread: internal and external
Ratings to BS 476: Part 7: 1987 are: Class 1
for internal surfaces of the upstand and frame,
and Class 1Y for the polycarbonate glazing.
Under Building Regulations Approved
Document B4 paragraph 15.7, a
polycarbonate rooflight with a Class 1 rating
may be regarded as having an AA designation
for external fire spread.
Weather resistance
Driving and deluge rain resistance
demonstrated by test.
Biological resistance
4mm screen in cowl excludes large insects.
Thermal insulation
The upstand and double/triple-skin glazing
give good thermal insulation and minimise
the risk of condensation. Our Technical
Department can provide computer
calculations of U-values for given sizes in
different roof constructions to comply with
Building Regulations Part L 2010.
Light transmission
For daylight areas see dimensions table.
Average visible light transmission for 3mm
glazing: clear 92%, diffused 85%, and bronze
50%. Clear glazing allows the greatest
amount of daylighting, making it ideal when
seeking passive solar gain. Diffused glazing
diffuses the light and cuts down shadows and
bright spots. Bronze glazing provides a good
combination of light transmission with
greater control of passive solar gain.
Specification clause
Provide controllable
ventilation combined with
rooflighting by means of
Litevent Airstract
ventilators.
Supplier: Passivent Ltd,
North Frith Oasts,
Ashes Lane, Hadlow.
Kent TN11 9QU
Telephone: 01732 850770,
Fax: 01732 850949.
Email:
projects@passivent.com
Sales: Passivent Ltd.
2 Brooklands Road, Sale.
Cheshire M33 3SS
Telephone: 0161 905 5700,
Fax: 0161 905 2085.
Email:
sales@passivent.com
Ventilator to comprise
mill finish aluminium
upstand with insulated
core, aluminium cowl,
vents and insect screen.
Internal surfaces white.
Glazing triple skin /
double skin 3mm to 4mm
polycarbonate with
ventilated air gap in
extruded aluminium
frame with mitred and
secret-welded corners.
Glazing to have 10-year
postformed warranty from
the material sheet
supplier against yellowing
and loss of light
transmission, and for
impact resistance.
*Glazing frame polyester
powder coated, colour ....
Glazing clear/
diffused/bronze*, shape:
pyramid/dome*.
Ventilator size: ......... (mm)
Ventilator to be resistant
to soft-body impact of
1200 Joules; classed as
non-fragile to HSG 33;
internal fire spread rating
Class 1Y, external fire
spread designation AA.
*Delete as applicable.
By virtue of the above performance, under
Approved Document B2 Table 11 and B4
Section 14, Litevent ventilators can be used
without restriction on size or spacing in all
types of occupiable and circulation space
except protected stairways.
...........................................................................................
19
........................
.........................
. . . . . . . . . . . . . . . . .FURTHER
. . . . . . . . . . . . . .INFORMATION
....................................
Extended warranty and maintenance
contracts are available.
Quality assurance
Passivent products are designed, developed
and manufactured under a BS EN IS0 9001
quality management system, giving an
independently audited assurance that the
products will fulfil their intended purpose.
Operational commitment
As part of our commitment to minimising
our impact on the environment, and to
continuous improvement in our methods
of operation, Passivent is accredited to
IS0 14001 Environmental Management,
OHSAS 18001 Health and Safety
Management, and ISO 9001 Quality
Management Systems.
Other products
Passivent market a range of other ventilation
and daylighting products including:
Aircool ventilators for windows, curtain
walling and walls.
Airstract roof terminals for passive stack and
other natural ventilation systems.
Airscoop wind-driven ventilation terminals.
Ventilation control systems.
Natural ventilation systems for commercial
and domestic buildings.
Solar shading systems.
Background ventilation.
Full range of wall and window vents.
Acoustic ventilation solutions.
...................................................................
PASSIVENT LIMITED
North Frith Oasts, Ashes Lane, Hadlow, Kent TN11 9QU Tel: 01732 850770 Fax: 01732 850949
2 Brooklands Road, Sale, Cheshire M33 3SS Tel: 0161-905 5700 Fax: 0161-905 2085
Email: sales@passivent.com Web: www.passivent.com
Passivent Limited maintains a policy of continuous development and reserves the
right to amend product specifications without notice.
A member of the Building Product Design Group
..................
..................
Produced by Ted Hastings/Rackley Design
Services
Installation and commissioning service
through an independent network of
MasterCare Installers.