SECTION 23 07 19
DUCT AND PLENUM INSULATION
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Copyright 2009 - 2014 ARCAT, Inc. - All rights reserved
PART 1 GENERAL
1.1
1.2
SECTION INCLUDES
A.
Duct insulation to achieve a 2-hour fire-resistive ventilation duct assembly and hazardous
exhaust systems.
B.
Plenum insulation to achieve a non-combustible rating for combustible materials in an air
plenum.
C.
Duct insulation to achieve zero clearance to combustibles and a 2-hour fire-resistive rated
duct enclosure on commercial kitchen grease duct exhaust systems.
D.
Duct insulation to achieve single layer, one-hour fire-resistance rated enclosure around dryer
exhaust ductwork.
RELATED SECTIONS
A.
1.3
Section 07 21 16 - Blanket Insulation.
REFERENCES
A.
The following published specifications, standards, or tests that apply to single layer, fire resistive rated ventilation air duct (VAD) insulation and hazardous exhaust duct insulation:
1.
International Organization for Standardization, Fire resistance tests ventilation air
ducts (ISO 6944).
2.
International Code Council (ICC).
3.
International Building Code (IBC).
4.
International Mechanical Code (IMC).
5.
ASTM C 411 - Standard Test Method for Hot-Surface Performance of HighTemperature Thermal Insulation.
6.
ASTM E 84 - Standard Test Method for Surface Burning Characteristics of Building
Materials.
7.
ASTM E 119 - Standard Test Method for Fire Tests of Building Construction
Materials.
8.
ASTM E 814 - Standard Test Method for Fire Tests of Through-Penetration Fire
Stops.
B.
The following published specifications, standards, tests, or recommended methods of trade,
industry, or governmental organizations apply to single layer noncombustible fire rated
plenum insulation:
1.
UL 1887 - Visible Flame and Smoke Characteristics for Plastic Pipe.
2.
ASTM E 84/UL/ULC 723 - Surface Burning Characteristics.
3.
ASTM E 136 - Non-combustibility.
23 07 13-1
1.4
1.5
C.
The following published specifications, standards, or tests that apply to zero clearance two
layer fire rated systems of grease duct insulation:
1.
NFPA 96.
2.
International Code Council Evaluation Service (ICCES).
3.
1997 ICBO Uniform Mechanical Code (ICBO UMC).
4.
1997 Uniform Building Code (UBC).
5.
2012 International Mechanical Code (IMC).
6.
2009 Uniform Mechanical Code (IAPMO UMC).
7.
2010 National Building Code of Canada.
8.
ASTM E 2336 - Standard Test Methods for Fire Resistance Rated Grease Duct
Enclosures.
9.
CAN/ULC-S144-09 Standard Method of Fire Resistance Test - Grease Duct
Assemblies First Edition.
10.
ASTM E 84 - Standard Test Method for Surface Burning Characteristics of Building
Materials.
11.
ASTM E 119 - Standard Test Methods for Fire Tests of Building Construction and
Materials.
12.
ASTM E 136 - Standard Test Method for Noncombustiblity.
13.
ASTM E 518 - Standard Test for Durability.
14.
ASTM E 814 - Standard Test Method for Fire Tests of Through-Penetration Fire Stops
D.
The following published specifications, standards, or tests that apply to single layer, fire resistive rated dryer duct (DPS) insulation:
1.
International Organization for Standardization, Fire resistance tests ventilation air
ducts (ISO 6944).
2.
International Building Code (IBC).
3.
International Mechanical Code (IMC).
4.
ASTM E 518 - Standard Test for Durability.
5.
ASTM E 84 - Standard Test Method for Surface Burning Characteristics of Building
Materials.
SUBMITTALS
A.
Submit under provisions of Section 01 30 00.
B.
Product Data: Manufacturer's data sheets on each product to be used, including:
1.
Preparation instructions and recommendations.
2.
Storage and handling requirements and recommendations.
3.
Installation methods.
C.
Submit certification and installation documentation showing system performance and Code
compliance.
QUALITY ASSURANCE
A.
Manufacturer Qualifications: Manufacturer capable of providing field service representation
during installation.
B.
Fabricator Qualifications: Fabrication performed in quality controlled manufacturing
environment by experienced fabricators with references indicating multiple satisfactory
experiences fabricating high temperature insulation blanket as required for this project.
C.
Installer Qualifications: Installer experienced in performing work of this section who has
specialized in installation of work similar to that required for this project.
D.
Mock-Up: Provide a mock-up for evaluation of surface preparation techniques and
application workmanship.
23 07 13-2
1.
2.
3.
E.
1.6
1.7
Finish areas designated by Architect.
Do not proceed with remaining work until workmanship, color, and sheen are
approved by Architect.
Refinish mock-up area as required to produce acceptable work.
Preinstallation Meetings: Conduct preinstallation meeting to verify project requirements,
manufacturer's installation instructions and manufacturer's warranty requirements. Comply
with Division 01 Project Management and Coordination (Project Meetings).
DELIVERY, STORAGE, AND HANDLING
A.
Deliver materials in original unopened packages, clearly marked with manufacturer's name,
product designation, manufacturer's lot numbers and appropriate third party classification
listings.
B.
Store in a covered dry environment.
C.
Store and dispose of solvent-based materials, and materials used with solvent-based
materials, in accordance with requirements of local authorities having jurisdiction.
PROJECT CONDITIONS
A.
Maintain environmental conditions (temperature, humidity, and ventilation) within limits
recommended by manufacturer for optimum results. Do not install products under
environmental conditions outside manufacturer's absolute limits.
PART 2 PRODUCTS
2.1
2.2
MANUFACTURERS
A.
Acceptable Manufacturer: Unifrax I LLC, which is located at: 600 Riverwalk Pkwy. Suite 120;
Tonawanda, NY 14150; Tel: 716-768-6500; Fax: 716-768-6400; Email:request info
(info@unifrax.com); Web:http://www.unifrax.com/market-segments/fire-protection
B.
Substitutions: Not permitted.
C.
Requests for substitutions will be considered in accordance with provisions of Section 01 60
00.
DUCT INSULATION FOR FIRE RATED VENTILATION AIR DUCTS (VAD) AND HAZARDOUS
EXHAUST DUCTS
A.
Product: FyreWrap Elite 1.5 Duct Insulation by Unifrax I LLC, Tonawanda, NY:
1.
Nominal 1.5 inch (38 mm) thick foil encapsulated blanket material at 6 PCF to provide
2-hour fire resistive enclosure assembly per ISO 6944.
2.
An inorganic, flexible, non-asbestos, bio-soluble high temperature, foil encapsulated
blanket material.
3.
Blanket insulation shall maintain a 2012 degree F (1100 degree C) operating
temperature.
4.
Blanket fiber materials shall be tested per EU regulatory requirements, Directive
97/69/EC for bio-solubility, and verified by an independent laboratory.
5.
Provide firestop sealants, tape, insulation pins, clips, banding and other components
to ensure the installed system complies with the complete tested two-hour fire rated
VAD assembly.
B.
Performance: Lightweight, non-asbestos, bio-soluble, high temperature, inorganic, foil
encapsulated insulation blanket. The duct wrap system shall be a tested and listed system
evaluated for a 2-hour fire resistance rating on a ventilation air duct assembly. Testing shall
23 07 13-3
be conducted by a nationally recognized testing laboratory.
1.
Performance Requirements:
a.
Single Layer System for two hour fire rating.
b.
2-hour fire resistive enclosure assembly tested per ISO 6944.
c.
Firestop tested per ASTM E 814, 2 Hour F and T Ratings.
d.
Meets 25/50 Flame and Smoke Ratings per ASTM E 84.
2.3
2.4
PLENUM INSULATION FOR NONCOMBUSTIBLE FIRE RATED PLENUM
A.
Product: FyreWrap 0.5 Plenum Insulation by Unifrax I LLC, Tonawanda, NY:
1.
Nominal 0.5 inches (12 mm) thick foil encapsulated blanket material to provide non
combustible rating.
2.
An inorganic, flexible, non-asbestos, bio-soluble high temperature, foil encapsulated
blanket material.
3.
Blanket insulation shall maintain a 2012 degree F (1100 degree C) operating
temperature.
4.
Blanket fiber materials shall be tested per EU regulatory requirements, Directive
97/69/EC for bio-solubility, and verified by an independent laboratory.
B.
Performance: A lightweight, non-asbestos, bio-soluble, high temperature, inorganic, foil
encapsulated insulation blanket. The plenum insulation system shall be tested and listed to
provide a non combustible rating for combustible items located in air plenums.
1.
Performance Requirements:
a.
Single Layer System of 1/2 inch (13 mm) thick material.
b.
Meets UL 1887 test criteria for visible flame and smoke characteristics.
c.
Meets 25/50 Flame and Smoke Ratings per ASTM E 84.
d.
Insulation and combustible item shall be tested as an assembly.
DUCT INSULATION FOR ZERO CLEARANCE APPLIED FIREPROOFING FOR FIRE-RATED
GREASE DUCTS
A.
Product: FyreWrap Elite 1.5 Duct Insulation by Unifrax I LLC, Tonawanda, NY:
1.
Nominal 1.5 inch (38 mm) thick foil encapsulated blanket material at 6 PCF to provide
2-hour fire resistive enclosure assembly per ASTM E 2336.
2.
A lightweight, flexible, inorganic, non-asbestos, bio-soluble, high temperature, foil
encapsulated blanket wrap.
3.
Flexible, fully encapsulated blanket material, two-layer system to provide 2-hour fire
resistive enclosure assembly per ASTM E 2336 and CAN/ULC-S144-09.
4.
Blanket insulation shall maintain a 2012 degree F (1100 degree C) operating
temperature.
5.
Blanket fiber materials shall be tested per EU regulatory requirements, Directive
97/69/EC for bio-solubility, and verified by an independent laboratory.
6.
Provide field fabricated or prefabricated fire rated access doors (for cleanout as
required) to maintain 2-hour rating and required clearance.
7.
Provide firestop sealants, tape, insulation pins, clips, banding and other components
as per manufacturer's instructions to provide fully functioning zero clearance to
combustibles grease duct system.
B.
Performance: Lightweight, non-asbestos, bio-soluble, high temperature, inorganic, foil
encapsulated insulation blanket. The blanket material shall be capable of performing at 2000
degree F (1093 degree C) matching the internal and external fire test temperature for grease
ducts. The duct wrap system shall be a tested and listed system evaluated for reduced
clearances to combustibles as an alternative to a grease duct, with a two-hour fire rated
shaft enclosure. Testing shall be conducted at a nationally recognized testing laboratory.
1.
Performance Requirements:
a.
Two-layer system of 1-1/2 inch (38 mm) 6 pcf (96 kg/m3) material.
b.
Zero clearance to combustibles across the entire surface of the blanket material
23 07 13-4
c.
d.
e.
f.
2.5
2.6
per internal fire tests of ASTM E 2336.
2-hour fire resistive enclosure assembly per ASTM E 119.
CAN/ULC-S144-09: Stability-2hr, Integrity-2hr, Insulation-2hr.
Firestop tested per ASTM E 814, 2 Hour F and T Ratings.
Meets 25/50 flame and smoke ratings per ASTM E 84.
DUCT INSULATION FOR SINGLE LAYER, ONE-HOUR RATED ENCLOSURE FOR DRYER
EXHAUST DUCTWORK
A.
Product: FyreWrap DPS Insulation by Unifrax LLC, Tonawanda, NY:
1.
Nominal 0.5 inch (13 mm) thick foil encapsulated blanket material at 8 PCF to provide
1-hour fire resistive enclosure assembly per ISO 6944.
2.
An inorganic, flexible, non-asbestos, bio-soluble high temperature, scrim
encapsulated blanket material.
3.
Blanket insulation shall maintain a 2300 degree F (1260 degree C) operating
temperature.
4.
Provide firestop sealants, tape, banding and other components to ensure the installed
system complies with the complete tested one-hour fire rated DPS assembly.
B.
Performance: Lightweight, non-asbestos, bio-soluble, high temperature, inorganic, foil
encapsulated insulation blanket. The plenum insulation system shall be tested and listed to
provide a 1 hour rating for combustible items located in air plenums. Testing shall be
conducted at a nationally recognized testing laboratory.
1.
Performance Requirements:
a.
ISO 6944 (1985): 1 Hour Ventilation Duct- Shaft alternative. UL Assembly No.
V-32.
b.
UL 1479/ASTM E814: Firestop: 1-hour F & T Ratings. UL Assembly Nos. F-C7057 & F-C-7058.
c.
ASTM E-84/UL 723: Encapsulated - Flame < 25, Smoke < 50. Unfaced - Flame
= 0, Smoke = 0.
d.
ASTM C 518: R-Value: DPS (1/2 inch (13 mm)) = 2.0.
e.
EN 1094: Temperature Grade 2300 degree F (1260 degree C).
f.
Code Compliance: 2012 IMC Sect. 504.2, 604, 2012 IBC Sect. 717.6.2, 713,
703.
ACCESS DOORS
A.
Access Door: Field fabricated 16 gauge steel.
1.
Threaded Rods: 1/4 inch (6 mm) diameter.
2.
Gasket: 1/2 inch (13 mm) Unfaced FyreWrap or ceramic fiber blanket.
B.
Access Door: Ductmate Ultimate prefabricated 16 gauge steel.
C.
Access Door: Ductmate F2 prefabricated 16 gauge steel.
PART 3 EXECUTION
3.1
3.2
EXAMINATION
A.
Do not begin installation until substrates have been properly prepared.
B.
If substrate preparation is the responsibility of another installer, notify Architect of
unsatisfactory preparation before proceeding.
PREPARATION
A.
Inspect and verify that all surfaces are smooth, dry, clean and free from dust, debris, or other
loose materials. Surfaces shall be dry before the application of insulation materials.
23 07 13-5
3.3
B.
Clean surfaces thoroughly prior to installation.
C.
Prepare surfaces using the methods recommended by the manufacturer for achieving the
best result for the substrate under the project conditions.
INSTALLATION
A.
Duct Insulation (HVAC and Hazardous Ducts):
1.
Single-Layer System: Apply single layer encapsulated insulation directly to duct
surface.
2.
Install with minimum 3 inch (76mm) material joint overlap.
3.
Seal cut edges with aluminum foil tape
4.
Attachment for duct widths of 24 inches (610 mm) or less:
a.
Temporarily secure duct insulation with 1 inch (25.4 mm) wide filament tape
located 1-1/2 inches (38 mm) from blanket edge and on 10-1/2 inch (267 mm)
centers.
b.
Permanently attach blanket with carbon steel or stainless steel banding located
1-1/2 inches (38 mm) from blanket edge and on 10-1/2 inch (267 mm) centers.
c.
Tighten steel bands to secure insulation firmly without damaging blanket.
5.
Attachment for duct widths greater than 24 inches (610 mm):
a.
Weld 12 gauge steel insulation pins to underside of horizontal runs and
backside of vertical runs in rows spaced maximum 10 1/2 inches (267 mm) on
center along duct length, 6 inches - 12 inches (152 - 305 mm) from duct edges.
b.
Space pins 12 inches (305 mm) on center across duct width.
c.
Impale insulation over pins and hold in place with 2-1/2 inch (64 mm) square
galvanized steel speed clips (washers).
d.
Turn down or cut off exposed pin ends.
B.
Plenum Insulation:
1.
Apply single layer encapsulated insulation directly to surface of combustible item.
2.
Cut insulation lengths to wrap around combustible item providing 1 inch (25.4 mm)
longitudinal overlap.
3.
Seal cut edges with aluminum foil tape.
4.
Provide 1 inch (25.4 mm) perimeter overlap with adjacent insulation blanket.
5.
Temporarily secure plenum insulation with 1 inch (25.4 mm) wide filament tape,
located 1/2 inch (12.7 mm) from blanket edge and on 11 inch (280 mm) centers.
6.
Permanently attach insulation with steel tie wire or banding on maximum 11 inch
centers (279 mm).
7.
Tighten wire or banding to secure insulation firmly without damaging blanket.
C.
Duct Insulation (Grease Ducts):
1.
Two-Layer System: Apply two-layers of encapsulated insulation directly on duct
surface.
2.
Install first layer with transverse material compression joints. Install first layer
longitudinal joints with minimum 3 inch (76mm) material joint overlaps.
3.
Install second layer with minimum 3 inch (76mm) material joint overlaps, offset
minimum of 12 inches (305mm) from first layer joints.
4.
Seal cut edges with aluminum foil tape.
5.
Transverse material joints may be installed using any of the following techniques:
a.
Telescope overlap - insulation installed by leaving one edge exposed and
overlapping other edge with adjacent blanket.
b.
Checkerboard overlap - overlap both edges of alternating blanket, leaving both
edges of others exposed.
c.
Butt joint and collar - cover blanket butt edges with 6 inch (152mm) blanket
collar centered on material joint.
6.
Banding for duct widths 24 inches (610 mm) or less:
a.
Temporarily secure insulation with filament tape.
23 07 13-6
b.
7.
8.
9.
D.
Place carbon steel or stainless steel bands (minimum 1/2 inch (12.7 mm) wide,
nominal 0.015 inch (0.4 mm) thick) 1-1/2 inches (38 mm) from edge of overlap
joints.
c.
Place bands at maximum 10-1/2 inches (267 mm) on center in field between
overlaps.
d.
Tighten steel bands to secure insulation firmly without damaging blanket.
Pins and banding for duct widths greater than 24 inches (610 mm) up through 48
inches (1220 mm):
a.
Weld 12 gauge steel insulation pins to underside of horizontal runs and
backside of vertical runs in rows spaced maximum 10-1/2 inches (267 mm) on
center along duct length.
b.
Space pins 12 inches (305 mm) on center across duct width and 1-1/2 inches
(38 mm) from duct edges.
c.
Impale insulation over pins and hold in place with 2-1/2 inch (64 mm) square
galvanized steel speed clips (washers).
d.
Secure insulation to duct with filament tape as needed.
e.
Turn down or cut off exposed pin ends.
f.
Locate carbon steel or stainless steel bands (minimum 1/2 inch (12.7 mm)
wide, nominal 0.015 inch (0.4 mm) thick) 1-1/2 inches (38 mm) from edge of
overlap joints.
g.
Space remaining bands at midpoint between overlap joints or at 10-1/2 inches
(267 mm) oc. Tighten steel bands to secure insulation firmly without damaging
blanket.
Pins for ducts wider than 48 inches (1220 mm):
a.
Weld 12 gauge steel insulation pins on all sides of duct in rows spaced
maximum 10 1/2 inches (267 mm) on center along duct length.
b.
Space pins 8 inches (203 mm) on center around duct and 5 inches (127 mm)
from duct edges. Center insulation overlaps on pins.
c.
Impale insulation over pins and hold in place with 2-1/2 inch (64 mm) square
galvanized steel speed clips (washers).
d.
Turn down or cut off exposed pin ends.
Vertical Ductwork: Apply insulation in continuous length parallel to vertical length of
duct with overlaps minimum of 6 inches (152 mm) from duct corners. Space pins 8
inches (203 mm) on center at centerline of vertically oriented overlaps and on
maximum 12 inch (305 mm) columns.
Duct Insulation (Dryer Exhaust Ducts):
1.
A single-layer system applied directly on to the surface of the duct or combustible
item.
2.
Dryer Applications:
a.
The width of the 16 inches (406 mm) product is tailored to provide a 1 inch (25
mm) longitudinal compression joint or overlap on a 4 inch (102 m) dryer duct.
Adjacent pieces of insulation shall be installed with a 1 inch (25 mm) perimeter
compression joint or material overlap. To temporarily secure the insulation,
optional use of foil tape is permitted. Seal all cut edges with aluminum foil tape
to ensure there is no exposed fiber. 18 gauge steel tie wire shall be utilized for
permanent attachment. Locate the wire 1/2 inch (13 mm) from the blanket edge
and on maximum 12 inches (305 mm) centers. Twist tension the wire to firmly
hold the wrap system in place, but not so tight as to cut or damage the blanket.
3.
Plenum Applications:
a.
For plastic items, cut the insulation to a length sufficient to wrap around the
combustible item(s) plus provide a minimum 1 inch (13 mm) perimeter overlap.
Seal all cut edges with aluminum foil tape to ensure there is no exposed fiber.
The adjacent piece of insulation shall be long enough to wrap around the
circumference of the item plus a 1 inch (13 mm) perimeter overlap. This piece
shall also be installed with a minimum 1 inch (13 mm) longitudinal overlap on to
23 07 13-7
b.
3.4
3.5
3.6
the previously installed piece.
To temporarily secure the insulation, optional use of foil tape is permitted. 24
gauge steel tie wire or 1/2 inch (13 mm) steel banding should be utilized as a
permanent attachment. Locate the wire or banding 1/2 inch (13 mm) from the
blanket edge and on 11-1/2 inches (292 mm) centers. Twist tension the wire or
tighten banding to firmly hold the wrap system in place, but not so tight as to cut
or damage the blanket. Hand tightening of wire is adequate.
ACCESS DOORS
A.
Field-Fabricated:
1.
Cut and remove installed insulation to dimension 2 inches (51 mm) larger than
opening.
2.
Seal cut edges of remaining insulation with aluminum foil tape.
3.
Cut access opening in duct.
4.
1/4 inch (6.4 mm) diameter threaded rod to corners of opening.
5.
Cover rods with hollow steel tubes.
6.
Cut 16 gauge cover plate with dimensions 2 inches (51 mm) larger than opening.
7.
Drill holes in cover plate to match rod pattern.
8.
Place 1/2 inch (12.7 mm) ceramic fiber or unfaced FyreWrap blanket gasket between
duct and access door cover.
9.
Install cover over rods.
10.
Single Layer: Weld 4 steel insulation pins to outside of door panel, 1 inch (25.4 mm)
from corners.
11.
Double Layer: Weld 5 steel insulation pins to outside of door panel, 1 inch (25.4 mm)
from corners.
12.
Cut first insulation piece to size of access door, seal cut edges with aluminum foil tape
and install over pins within cutout area.
13.
Cut second insulation piece with dimensions 2 inches (51 mm) larger than first piece,
seal cut edges with aluminum foil tape and install over pins.
14.
Cut third insulation piece (for 2-Layer grease duct systems only) with dimensions 2
inches (51 mm) larger than second piece, seal cut edges with aluminum foil tape and
install over pins.
15.
Place washers on pins and bend over excess pin lengths.
16.
Place washers on threaded rods and secure with nuts.
B.
Pre-fabricated: Ductmate Industries - Ultimate and F-2 access door to be prefabricated from
16 gauge steel and installed as one unit.
MAINTENANCE
A.
Cut banding or insulation washers on damaged blanket areas and remove.
B.
Cut and remove damaged blanket.
C.
Cut new blanket piece with exact dimensions as that removed and install on ductwork in
same configuration as previously used in compliance with required material overlaps and
attachment methods.
D.
Ensure same minimum overlap is created.
E.
Replace permanent attachment.
FIELD QUALITY CONTROL
A.
Have manufacturer of products supplied under this Section review Work involved in
handling, installation/application and protection of its products, and submit written reports in
23 07 13-8
acceptable format to verify compliance of Work with Contract.
B.
3.7
Schedule site visits to review Work as installation is about to begin.
PROTECTION
A.
Protect installed products until completion of project.
B.
Touch-up, repair or replace damaged products before Substantial Completion.
END OF SECTION
23 07 13-9