The Simple Approach to Energy
Conservation
This Presentation
•
•
•
•
•
•
U values in Glass
Thermally Broken systems
Gas filling IGU
Ceramic Frit and Shading Coefficients
High Performance multi-function Low e
Round up
U Value calculations
• EN 673 The standard method of assessing a
U value.
• ASHRAE Standard.
U Value Calculations
Standard window pane
1000mm x 1500mm
Area = 1.5m²
Area for calculation DOES NOT
include the perimeter.
For this pane your U value is based on
An area of 1.26m² (84%)
Thermally Broken systems
Thermal protection at the Unit edge
Thermally Broken systems
Edgetech
Superspacer
provides the
most energy
efficient
thermal break
at an IGU edge
Thermally Broken systems
Thermal protection at the frame edge
PVCu
Thermally Broken systems
Thermal protection at the frame edge
Thermal Break Aluminium
Solid aluminium sections typically have a U Value of 1.9 W/m² °C
Thermal Break Aluminium Sections typically have a U Value of 1.0 W/m² °C
Thermally Broken systems
As much as 15% of the Facade may consist of a framing system
designed to carry the glass. In domestic buildings the figure can
be higher.
Unprotected system edges are like having a portion of your facade with a solid
Portion with an insignificant U value.
k-value
Gas Filling
3.4
Optimum space
3.2
filled with krypton
(90%)
filled with argon (90%)
3
filled with air
2.8
conventional IG filled
with air
2.6
2.4
2.2
2
1.8
1.6
1.4
1.2
6
7
8
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Space effects on U values
distance between panes [mm]
Ceramic Frit and Shading
Coefficients
Shading coefficients are
improved according to the
percentage of frit applied.
Typical applications are 40% 50%
and 60%
Those products with low shading
coefficients attract the most
improvement.
Ceramic Frit and Shading
Coefficients
Dot Series
Line Series
High Performance multi-function
Low e
Considerations
1.Tempering
2.Local Processing
3.Air space
4.Shipping
Assuming an optimum air space
for IGU comprising 6 – 16 – 6
more than 50% of your shipping
cost will be for bringing air.
Round Up
• U values in Glass
Understanding the calculation
• Thermally Broken systems
Spending money on enhancing glass performance is
offset by not giving consideration to edge effects
• Gas filling
Optimum performance
• Ceramic Frit and Shading Coefficients
Improvements in Shading Coefficients and enhancing
the appearance.
• High Performance multi-function Low e
Where to process
The Simple Approach to Energy
Conservation
• What makes this presentation a Simple
Approach?
• Understanding all the small steps that you can
take to improve Energy Conservation in Glass
lets you choose how far you want to go.
END
Presented by John Reeves