Optimal Glazing
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Evironment Index:

Pilkington Spectrum 2 is an on-line program accessed from Pilkington's site.

Calumen is an equivalent program, downloaded from Saint-Gobain-Glass' site.

Rockwool Energy Design is a program downloaded from Rockwool' site. Official program for energy label calculation and reporting.

Consumer prices for insulating double panes are calculated on-line by VinduesMarkedet ApS' site.
Pilkington Spectrum.

Pilkington Spectrum 2 On-line calculates the energy label for single-, double- and triple-glazed panes U/LT/g for panes, where
U = Thermal transmission in W/(m2K),
LT = Light transmittance in % and
g = Total solar energy transmittance in %.

Glazing Gas I mm   II mm III U LT g
Single   C         5,80 90 85
Single   K         3,70 82 74
Double Air C 16 C     2,74 81 76
Double Argon C 15 C     2,63 81 74
Double Krypton C 10 C     2,60 81 74
Double Xenon C 8 C     2,60 81 74
Double Air C 16 O     1,37 80 61
Double Argon C 15 O     1,12 80 61
Double Krypton C 10 O     1,05 80 61
Double Xenon C 8 O     1,05 80 61
Triple Air O 20 C 20 O 0,65 71 50
Triple Argon O 20 C 20 O 0,52 71 50
Triple Krypton O 12 C 12 O 0,49 71 50
Triple Xenon O 9 C 9 O 0,48 71 50

I = First glazing
II = Second glazing
III =Third glazing
mm = Optimal size of gas-filled cavity in mm
C = Pilkington Optifloat Clear, Floatglas , 4 mm, non-coated
K = Pilkington K Glass, Floatglas , 4 mm, coated
O = Pilkington Optitherm S3, Floatglas , 4 mm, coated

Gas cavity efficiency

Energy Label

SN=Pilkington Optitherm SN, Floatglas coated. SN has been replaced by Pilkington Optitherm S3, Floatglas coated.

 

Glass consumer price
Price per 23. September 2009. Price difference between argon and krypton is 66 DKK per standard double-glazed pane per mm gas or 36 DKK per sqm for 1 mm gas.
Glass price
Price of a double-glazed window with krypton costs 315 DKK more than the same with argon per sqm.