Data sheetPsi values for windows

Rolltech A/SW. Brüels Vej 20DK - 9800 Hjørring

SZR

2

1

h2

h1

Two

Box

mod

elCh

arac

teris

tic v

alue

sEx

plan

atio

nsRe

pres

enta

tive

fram

e pr

ofile

Metal with thermal break

Space between panes in mmBox 1 · h1 = 3 mm Box 2 · h2 = 6.5 mm

�eq,2B in W/mK

0.069 0.051 0.053 0.059

0.065 0.048 0.053 0.059

Plastic Wood Wood / Metal

Double-sheet insulating glassUg=1.1 W/m2K

Triple-sheet insulating glassUg=0.7 W/m2K

The representative linear heat transfer coefficients (representative psi values) apply to typical frame profiles and glazing for the determination of the heat transfer coefficients UW of windows. They have been determined using the boundary conditions (frameprofile, glazing, glass mounting depth, back covering, primary and secondary sealant) defined in the ift guideline WA-08/1 "Thermally improved spacers - Part 1: Determination of the representative psi values for window frame profiles". This directive alsogoverns the area of validity and application of the representative psi values. In order to avoid rounding errors, the psi values in thedata sheet have been given to 0.001 W/mK. The method used for the arithmetic determination of the psi values has an accuracyof ± 0.003 W/mK. Differences of less than 0.005 W/mK are not significant.

October 2008 – No.1 – Revision index 1

Characteristic values determined by:

4 16 4

4 12 4 12 4

16 0.40 0.82

12 0.40 0.78

Repr

esen

tativ

e ps

i val

ue d

oubl

e-sh

eet t

herm

ally

insu

latin

g gl

ass

W/m

K

Repr

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i val

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iple

-sh

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latin

g gl

ass

W/m

K

Cros

s-se

ctio

n

MaterialSpacer height in mmProduct name Thermal conductivity � in W/mK Thickness d in mm

Chromatech

6.5 Stainless steel 15 0.18

‘WARM EDGE’ WORKING PARTY

BF_Datenblaetter RZ Engl. 1008:Layout 1 10.10.2008 11:11 Uhr Seite 1

SZR

2

1

h2

h1

Two

Box

mod

elCh

arac

teris

tic v

alue

sEx

plan

atio

nsRe

pres

enta

tive

fram

e pr

ofile

Metal with thermal break

Space between panes in mmBox 1 · h1 = 3 mm Box 2 · h2 = 7 mm

�eq,2B in W/mK

0.067 0.051 0.052 0.058

0.063 0.048 0.052 0.057

Plastic Wood Wood / Metal

Double-sheet insulating glassUg=1.1 W/m2K

Triple-sheet insulating glassUg=0.7 W/m2K

The representative linear heat transfer coefficients (representative psi values) apply to typical frame profiles and glazing for the determination of the heat transfer coefficients UW of windows. They have been determined using the boundary conditions (frameprofile, glazing, glass mounting depth, back covering, primary and secondary sealant) defined in the ift guideline WA-08/1 "Thermally improved spacers - Part 1: Determination of the representative psi values for window frame profiles". This directive alsogoverns the area of validity and application of the representative psi values. In order to avoid rounding errors, the psi values in thedata sheet have been given to 0.001 W/mK. The method used for the arithmetic determination of the psi values has an accuracyof ± 0.003 W/mK. Differences of less than 0.005 W/mK are not significant.

October 2008 – No.2 – Revision index 1

Characteristic values determined by:

4 16 4

4 12 4 12 4

16 0.40 0.69

12 0.40 0.66

Data sheetPsi values for windows

Rolltech A/SW. Brüels Vej 20DK - 9800 Hjørring

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W/m

K

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W/m

K

Cros

s-se

ctio

n

MaterialSpacer height in mmProduct name Thermal conductivity � in W/mK Thickness d in mm

Chromatech Plus

7 Stainless steel 15 0.15

‘WARM EDGE’ WORKING PARTY

BF_Datenblaetter RZ Engl. 1008:Layout 1 10.10.2008 11:11 Uhr Seite 2

Data sheetPsi values for windows

Allmetal GmbHJunkerstr. 8D - 04509 Wiedemar

SZR

2

1

h2

h1

Two

Box

mod

elCh

arac

teris

tic v

alue

sEx

plan

atio

nsRe

pres

enta

tive

fram

e pr

ofile

Metal with thermal break

Space between panes in mmBox 1 · h1 = 3 mm Box 2 · h2 = 6.5 mm

�eq,2B in W/mK

0.065 0.049 0.051 0.056

0.061 0.046 0.051 0.056

Plastic Wood Wood / Metal

Double-sheet insulating glassUg=1.1 W/m2K

Triple-sheet insulating glassUg=0.7 W/m2K

The representative linear heat transfer coefficients (representative psi values) apply to typical frame profiles and glazing for the determination of the heat transfer coefficients UW of windows. They have been determined using the boundary conditions (frameprofile, glazing, glass mounting depth, back covering, primary and secondary sealant) defined in the ift guideline WA-08/1 "Thermally improved spacers - Part 1: Determination of the representative psi values for window frame profiles". This directive alsogoverns the area of validity and application of the representative psi values. In order to avoid rounding errors, the psi values in thedata sheet have been given to 0.001 W/mK. The method used for the arithmetic determination of the psi values has an accuracyof ± 0.003 W/mK. Differences of less than 0.005 W/mK are not significant.

October 2008 – No.3 – Revision index 1

Characteristic values determined by:

4 16 4

4 12 4 12 4

16 0.40 0.72

12 0.40 0.69

Repr

esen

tativ

e ps

i val

ue d

oubl

e-sh

eet t

herm

ally

insu

latin

g gl

ass

W/m

K

Repr

esen

tativ

e ps

i val

ue tr

iple

-sh

eet t

herm

ally

insu

latin

g gl

ass

W/m

K

Cros

s-se

ctio

n

MaterialSpacer height in mmProduct name Thermal conductivity � in W/mK Thickness d in mm

GTS

6.5 Stainless steel 15 0.152

‘WARM EDGE’ WORKING PARTY

BF_Datenblaetter RZ Engl. 1008:Layout 1 10.10.2008 11:11 Uhr Seite 3

SZR

2

1

h2

h1

Two

Box

mod

elCh

arac

teris

tic v

alue

sEx

plan

atio

nsRe

pres

enta

tive

fram

e pr

ofile

Metal with thermal break

Space between panes in mmBox 1 · h1 = 3 mm Box 2 · h2 = 7 mm

�eq,2B in W/mK

0.068 0.051 0.053 0.058

0.063 0.048 0.053 0.058

Plastic Wood Wood / Metal

Double-sheet insulating glassUg=1.1 W/m2K

Triple-sheet insulating glassUg=0.7 W/m2K

The representative linear heat transfer coefficients (representative psi values) apply to typical frame profiles and glazing for the determination of the heat transfer coefficients UW of windows. They have been determined using the boundary conditions (frameprofile, glazing, glass mounting depth, back covering, primary and secondary sealant) defined in the ift guideline WA-08/1 "Thermally improved spacers - Part 1: Determination of the representative psi values for window frame profiles". This directive alsogoverns the area of validity and application of the representative psi values. In order to avoid rounding errors, the psi values in thedata sheet have been given to 0.001 W/mK. The method used for the arithmetic determination of the psi values has an accuracyof ± 0.003 W/mK. Differences of less than 0.005 W/mK are not significant.

October 2008 – No.4 – Revision index 1

Characteristic values determined by:

4 16 4

4 12 4 12 4

16 0.40 0.72

12 0.40 0.68

Data sheetPsi values for windows

Helmut Lingemann GmbH & Co. KGAm Deckershäuschen 62D - 42010 Wuppertal

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W/m

K

Repr

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ass

W/m

K

Cros

s-se

ctio

n

MaterialSpacer height in mmProduct name Thermal conductivity � in W/mK Thickness d in mm

Nirotec 017

7 Stainless steel 15 0.17

‘WARM EDGE’ WORKING PARTY

BF_Datenblaetter RZ Engl. 1008:Layout 1 10.10.2008 11:11 Uhr Seite 4

Data sheetPsi values for windows

Helmut Lingemann GmbH & Co. KGAm Deckershäuschen 62D - 42010 Wuppertal

SZR

2

1

h2

h1

Two

Box

mod

elCh

arac

teris

tic v

alue

sEx

plan

atio

nsRe

pres

enta

tive

fram

e pr

ofile

Metal with thermal break

Space between panes in mmBox 1 · h1 = 3 mm Box 2 · h2 = 7 mm

�eq,2B in W/mK

0.066 0.050 0.051 0.057

0.061 0.047 0.051 0.056

Plastic Wood Wood / Metal

Double-sheet insulating glassUg=1.1 W/m2K

Triple-sheet insulating glassUg=0.7 W/m2K

The representative linear heat transfer coefficients (representative psi values) apply to typical frame profiles and glazing for the determination of the heat transfer coefficients UW of windows. They have been determined using the boundary conditions (frameprofile, glazing, glass mounting depth, back covering, primary and secondary sealant) defined in the ift guideline WA-08/1 "Thermally improved spacers - Part 1: Determination of the representative psi values for window frame profiles". This directive alsogoverns the area of validity and application of the representative psi values. In order to avoid rounding errors, the psi values in thedata sheet have been given to 0.001 W/mK. The method used for the arithmetic determination of the psi values has an accuracyof ± 0.003 W/mK. Differences of less than 0.005 W/mK are not significant.

October 2008 – No.5 – Revision index 1

Characteristic values determined by:

4 16 4

4 12 4 12 4

16 0.40 0.65

12 0.40 0.61

Cros

s-se

ctio

n

MaterialSpacer height in mmProduct name Thermal conductivity � in W/mK Thickness d in mm

Nirotec 015

7 Stainless steel 15 0.15

Repr

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ue d

oubl

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ass

W/m

K

Repr

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W/m

K

‘WARM EDGE’ WORKING PARTY

BF_Datenblaetter RZ Engl. 1008:Layout 1 10.10.2008 11:11 Uhr Seite 5

Data sheetPsi values for windows

Edgetech Europe GmbHErftstraße 22-24D - 41460 Neuss

SZR

2

1

h2

h1

Two

Box

mod

elCh

arac

teris

tic v

alue

sEx

plan

atio

nsRe

pres

enta

tive

fram

e pr

ofile

Metal with thermal break

Space between panes in mmBox 1 · h1 = 3 mm Box 2 · h2 = 7.3 mm

�eq,2B in W/mK

0.041 0.035 0.034 0.037

0.036 0.033 0.032 0.035

Plastic Wood Wood / Metal

Double-sheet insulating glassUg=1.1 W/m2K

Triple-sheet insulating glassUg=0.7 W/m2K

The representative linear heat transfer coefficients (representative psi values) apply to typical frame profiles and glazing for the determination of the heat transfer coefficients UW of windows. They have been determined using the boundary conditions (frameprofile, glazing, glass mounting depth, back covering, primary and secondary sealant) defined in the ift guideline WA-08/1 "Thermally improved spacers - Part 1: Determination of the representative psi values for window frame profiles". This directive alsogoverns the area of validity and application of the representative psi values. In order to avoid rounding errors, the psi values in thedata sheet have been given to 0.001 W/mK. The method used for the arithmetic determination of the psi values has an accuracyof ± 0.003 W/mK. Differences of less than 0.005 W/mK are not significant.

October 2008 – No.6 – Revision index 1

Characteristic values determined by:

4 16 4

4 12 4 12 4

16 0.40 0.18

12 0.40 0.18

Repr

esen

tativ

e ps

i val

ue d

oubl

e-sh

eet t

herm

ally

insu

latin

g gl

ass

W/m

K

Repr

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i val

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iple

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insu

latin

g gl

ass

W/m

K

Cros

s-se

ctio

n

MaterialSpacer height in mmProduct name Thermal conductivity � in W/mK Thickness d in mm

Super Spacer TriSeal

7.3Mylar foil 1.1 0.10

Silicone foam 0.16 7.2

‘WARM EDGE’ WORKING PARTY

BF_Datenblaetter RZ Engl. 1008:Layout 1 10.10.2008 11:11 Uhr Seite 6

Data sheetPsi values for windows

SZR

2

1

h2

h1

Two

Box

mod

elCh

arac

teris

tic v

alue

sEx

plan

atio

nsRe

pres

enta

tive

fram

e pr

ofile

Metal with thermal break

Space between panes in mmBox 1 · h1 = 3 mm Box 2 · h2 = 6.5 mm

�eq,2B in W/mK

0.060 0.045 0.047 0.052

0.056 0.042 0.046 0.051

Plastic Wood Wood / Metal

Double-sheet insulating glassUg=1.1 W/m2K

Triple-sheet insulating glassUg=0.7 W/m2K

The representative linear heat transfer coefficients (representative psi values) apply to typical frame profiles and glazing for the determination of the heat transfer coefficients UW of windows. They have been determined using the boundary conditions (frameprofile, glazing, glass mounting depth, back covering, primary and secondary sealant) defined in the ift guideline WA-08/1 "Thermally improved spacers - Part 1: Determination of the representative psi values for window frame profiles". This directive alsogoverns the area of validity and application of the representative psi values. In order to avoid rounding errors, the psi values in thedata sheet have been given to 0.001 W/mK. The method used for the arithmetic determination of the psi values has an accuracyof ± 0.003 W/mK. Differences of less than 0.005 W/mK are not significant.

October 2008 – No.7 – Revision index 1

Characteristic values determined by:

4 16 4

4 12 4 12 4

16 0.40 0.62

12 0.40 0.56

SAINT-GOBAIN GLASS SOLUTIONS SUISSE AGZweigniederlassung Kreuzlingen, Abt. SwisspacerSonnenwiesenstraße 15CH - 8280 Kreuzlingen

Repr

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ue d

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W/m

K

Repr

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W/m

K

Cros

s-se

ctio

n

MaterialSpacer height in mmProduct name Thermal conductivity � in W/mK Thickness d in mm

Swisspacer

6.5Aluminium 160 0.03

Plastic 0.16 1.0

‘WARM EDGE’ WORKING PARTY

BF_Datenblaetter RZ Engl. 1008:Layout 1 10.10.2008 11:12 Uhr Seite 7

Data sheetPsi values for windows

SZR

2

1

h2

h1

Two

Box

mod

elCh

arac

teris

tic v

alue

sEx

plan

atio

nsRe

pres

enta

tive

fram

e pr

ofile

Metal with thermal break

Space between panes in mmBox 1 · h1 = 3 mm Box 2 · h2 = 6.5 mm

�eq,2B in W/mK

0.039 0.034 0.032 0.035

0.034 0.032 0.031 0.033

Plastic Wood Wood / Metal

Double-sheet insulating glassUg=1.1 W/m2K

Triple-sheet insulating glassUg=0.7 W/m2K

The representative linear heat transfer coefficients (representative psi values) apply to typical frame profiles and glazing for the determination of the heat transfer coefficients UW of windows. They have been determined using the boundary conditions (frameprofile, glazing, glass mounting depth, back covering, primary and secondary sealant) defined in the ift guideline WA-08/1 "Thermally improved spacers - Part 1: Determination of the representative psi values for window frame profiles". This directive alsogoverns the area of validity and application of the representative psi values. In order to avoid rounding errors, the psi values in thedata sheet have been given to 0.001 W/mK. The method used for the arithmetic determination of the psi values has an accuracyof ± 0.003 W/mK. Differences of less than 0.005 W/mK are not significant.

October 2008 – No.8 – Revision index 1

Characteristic values determined by:

4 16 4

4 12 4 12 4

16 0.40 0.18

12 0.40 0.18

SAINT-GOBAIN GLASS SOLUTIONS SUISSE AGZweigniederlassung Kreuzlingen, Abt. SwisspacerSonnenwiesenstraße 15CH - 8280 Kreuzlingen

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W/m

K

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W/m

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Cros

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n

MaterialSpacer height in mmProduct name Thermal conductivity � in W/mK Thickness d in mm

Swisspacer V

6.5Stainless steel 15 0.01

Plastic 0.16 1.0

‘WARM EDGE’ WORKING PARTY

BF_Datenblaetter RZ Engl. 1008:Layout 1 10.10.2008 11:12 Uhr Seite 8

Data sheetPsi values for windows

Technoform Glass Insulation GmbH Dormannweg 48D - 34123 Kassel

SZR

2

1

h2

h1

Two

Box

mod

elCh

arac

teris

tic v

alue

sEx

plan

atio

nsRe

pres

enta

tive

fram

e pr

ofile

Metal with thermal break

Space between panes in mmBox 1 · h1 = 3 mm Box 2 · h2 = 6.9 mm

�eq,2B in W/mK

0.056 0.044 0.044 0.049

0.051 0.041 0.043 0.047

Plastic Wood Wood / Metal

Double-sheet insulating glassUg=1.1 W/m2K

Triple-sheet insulating glassUg=0.7 W/m2K

The representative linear heat transfer coefficients (representative psi values) apply to typical frame profiles and glazing for the determination of the heat transfer coefficients UW of windows. They have been determined using the boundary conditions (frameprofile, glazing, glass mounting depth, back covering, primary and secondary sealant) defined in the ift guideline WA-08/1 "Thermally improved spacers - Part 1: Determination of the representative psi values for window frame profiles". This directive alsogoverns the area of validity and application of the representative psi values. In order to avoid rounding errors, the psi values in thedata sheet have been given to 0.001 W/mK. The method used for the arithmetic determination of the psi values has an accuracyof ± 0.003 W/mK. Differences of less than 0.005 W/mK are not significant.

October 2008 – No.9 – Revision index 1

Characteristic values determined by:

4 16 4

4 12 4 12 4

16 0.40 0.45

12 0.40 0.43

Repr

esen

tativ

e ps

i val

ue d

oubl

e-sh

eet t

herm

ally

insu

latin

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ass

W/m

K

Repr

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W/m

K

Cros

s-se

ctio

n

MaterialSpacer height in mmProduct name Thermal conductivity � in W/mK Thickness d in mm

TGI-Spacer

6.9Stainless steel 25 0.10

Plastic 0.195 0.6/0.8

‘WARM EDGE’ WORKING PARTY

BF_Datenblaetter RZ Engl. 1008:Layout 1 10.10.2008 11:12 Uhr Seite 9

Data sheetPsi values for windows

ENSINGER GmbH, Niederlassung RavensburgMooswiesen 13D - 88214 Ravensburg

SZR

2

1

h2

h1

Two

Box

mod

elCh

arac

teris

tic v

alue

sEx

plan

atio

nsRe

pres

enta

tive

fram

e pr

ofile

Metal with thermal break

Space between panes in mmBox 1 · h1 = 3 mm Box 2 · h2 = 7 mm

�eq,2B in W/mK

0.051 0.041 0.041 0.044

0.045 0.038 0.039 0.042

Plastic Wood Wood / Metal

Double-sheet insulating glassUg=1.1 W/m2K

Triple-sheet insulating glassUg=0.7 W/m2K

The representative linear heat transfer coefficients (representative psi values) apply to typical frame profiles and glazing for the determination of the heat transfer coefficients UW of windows. They have been determined using the boundary conditions (frameprofile, glazing, glass mounting depth, back covering, primary and secondary sealant) defined in the ift guideline WA-08/1 "Thermally improved spacers - Part 1: Determination of the representative psi values for window frame profiles". This directive alsogoverns the area of validity and application of the representative psi values. In order to avoid rounding errors, the psi values in thedata sheet have been given to 0.001 W/mK. The method used for the arithmetic determination of the psi values has an accuracyof ± 0.003 W/mK. Differences of less than 0.005 W/mK are not significant.

October 2008 – No.10 – Revision index 1

Characteristic values determined by:

4 16 4

4 12 4 12 4

16 0.40 0.33

12 0.40 0.32

Repr

esen

tativ

e ps

i val

ue d

oubl

e-sh

eet t

herm

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W/m

K

Repr

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ass

W/m

K

Cros

s-se

ctio

n

MaterialSpacer height in mmProduct name Thermal conductivity � in W/mK Thickness d in mm

Thermix TX.N Abstandhalter

7Stainless steel 15 0.10

Plastic 0.23 1.3/0.8

‘WARM EDGE’ WORKING PARTY

BF_Datenblaetter RZ Engl. 1008:Layout 1 10.10.2008 11:12 Uhr Seite 10

Data sheetPsi values for windows

KÖMMERLING CHEMISCHE FABRIK GMBHZweibrücker Straße 200D - 66954 Pirmasens

SZR

2

1

h2

h1

Two

Box

mod

elCh

arac

teris

tic v

alue

sEx

plan

atio

nsRe

pres

enta

tive

fram

e pr

ofile

Metal with thermal break

Space between panes in mmBox 1 · h1 = 4 mm Box 2 · h2 = 6 mm

�eq,2B in W/mK

0.047 0.039 0.038 0.042

0.042 0.037 0.037 0.040

Plastic Wood Wood / Metal

Double-sheet insulating glassUg=1.1 W/m2K

Triple-sheet insulating glassUg=0.7 W/m2K

The representative linear heat transfer coefficients (representative psi values) apply to typical frame profiles and glazing for the determination of the heat transfer coefficients UW of windows. They have been determined using the boundary conditions (frameprofile, glazing, glass mounting depth, back covering, primary and secondary sealant) defined in the ift guideline WA-08/1 "Thermally improved spacers - Part 1: Determination of the representative psi values for window frame profiles". This directive alsogoverns the area of validity and application of the representative psi values. In order to avoid rounding errors, the psi values in thedata sheet have been given to 0.001 W/mK. The method used for the arithmetic determination of the psi values has an accuracyof ± 0.003 W/mK. Differences of less than 0.005 W/mK are not significant.

October 2008 – No.11 – Revision index 1

Characteristic values determined by:

4 16 4

4 12 4 12 4

16 0.40 0.25

12 0.40 0.25

Repr

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W/m

K

Repr

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W/m

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Cros

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n

MaterialSpacer height in mmProduct name Thermal conductivity � in W/mK Thickness d in mm

TPS

6 Polyisobutylene 0.25 6.0

‘WARM EDGE’ WORKING PARTY

BF_Datenblaetter RZ Engl. 1008:Layout 1 10.10.2008 11:12 Uhr Seite 11

Data sheetPsi values for windows

Glaswerke Arnold GmbH & Co. KG Neuseser Straße 1D - 91732 Merkendorf

SZR

2

1

h2

h1

Two

Box

mod

elCh

arac

teris

tic v

alue

sEx

plan

atio

nsRe

pres

enta

tive

fram

e pr

ofile

Metal with thermal break

Space between panes in mmBox 1 · h1 = 3 mm Box 2 · h2 = 6.5 mm

�eq,2B in W/mK

0.071 0.052 0.054 0.060

0.067 0.049 0.055 0.061

Plastic Wood Wood / Metal

Double-sheet insulating glassUg=1.1 W/m2K

Triple-sheet insulating glassUg=0.7 W/m2K

The representative linear heat transfer coefficients (representative psi values) apply to typical frame profiles and glazing for the determination of the heat transfer coefficients UW of windows. They have been determined using the boundary conditions (frameprofile, glazing, glass mounting depth, back covering, primary and secondary sealant) defined in the ift guideline WA-08/1 "Thermally improved spacers - Part 1: Determination of the representative psi values for window frame profiles". This directive alsogoverns the area of validity and application of the representative psi values. In order to avoid rounding errors, the psi values in thedata sheet have been given to 0.001 W/mK. The method used for the arithmetic determination of the psi values has an accuracyof ± 0.003 W/mK. Differences of less than 0.005 W/mK are not significant.

October 2008 – No.12 – Revision index 1

Characteristic values determined by:

4 16 4

4 12 4 12 4

16 0.40 0.89

12 0.40 0.85

Repr

esen

tativ

e ps

i val

ue d

oubl

e-sh

eet t

herm

ally

insu

latin

g gl

ass

W/m

K

Repr

esen

tativ

e ps

i val

ue tr

iple

-sh

eet t

herm

ally

insu

latin

g gl

ass

W/m

K

Cros

s-se

ctio

n

MaterialSpacer height in mmProduct name Thermal conductivity � in W/mK Thickness d in mm

WEP classic

6.5 Stainless steel 15 0.20

‘WARM EDGE’ WORKING PARTY

BF_Datenblaetter RZ Engl. 1008:Layout 1 10.10.2008 11:12 Uhr Seite 12

Data sheetPsi values for windows

Glaswerke Arnold GmbH & Co. KG Neuseser Straße 1D - 91732 Merkendorf

SZR

2

1

h2

h1

Two

Box

mod

elCh

arac

teris

tic v

alue

sEx

plan

atio

nsRe

pres

enta

tive

fram

e pr

ofile

Metal with thermal break

Space between panes in mmBox 1 · h1 = 3 mm Box 2 · h2 = 7.2 mm

�eq,2B in W/mK

0.068 0.051 0.053 0.058

0.063 0.048 0.052 0.058

Plastic Wood Wood / Metal

Double-sheet insulating glassUg=1.1 W/m2K

Triple-sheet insulating glassUg=0.7 W/m2K

The representative linear heat transfer coefficients (representative psi values) apply to typical frame profiles and glazing for the determination of the heat transfer coefficients UW of windows. They have been determined using the boundary conditions (frameprofile, glazing, glass mounting depth, back covering, primary and secondary sealant) defined in the ift guideline WA-08/1 "Thermally improved spacers - Part 1: Determination of the representative psi values for window frame profiles". This directive alsogoverns the area of validity and application of the representative psi values. In order to avoid rounding errors, the psi values in thedata sheet have been given to 0.001 W/mK. The method used for the arithmetic determination of the psi values has an accuracyof ± 0.003 W/mK. Differences of less than 0.005 W/mK are not significant.

October 2008 – No.13 – Revision index 1

Characteristic values determined by:

4 16 4

4 12 4 12 4

16 0.40 0.67

12 0.40 0.64

Repr

esen

tativ

e ps

i val

ue d

oubl

e-sh

eet t

herm

ally

insu

latin

g gl

ass

W/m

K

Repr

esen

tativ

e ps

i val

ue tr

iple

-sh

eet t

herm

ally

insu

latin

g gl

ass

W/m

K

Cros

s-se

ctio

n

MaterialSpacer height in mmProduct name Thermal conductivity � in W/mK Thickness d in mm

WEP premium

7.2 Stainless steel 15 0.15

‘WARM EDGE’ WORKING PARTY

BF_Datenblaetter RZ Engl. 1008:Layout 1 10.10.2008 11:12 Uhr Seite 13

Data sheetPsi values for windows

Rolltech A/SW. Brüels Vej 20DK - 9800 Hjørring

SZR

2

1

h2

h1

Two

Box

mod

elCh

arac

teris

tic v

alue

sEx

plan

atio

nsRe

pres

enta

tive

fram

e pr

ofile

Metal with thermal break

Space between panes in mmBox 1 · h1 = 3 mm Box 2 · h2 = 6.5 mm

�eq,2B in W/mK

0.051 0.041 0.041 0.045

0.045 0.038 0.040 0.043

Plastic Wood Wood / Metal

Double-sheet insulating glassUg=1.1 W/m2K

Triple-sheet insulating glassUg=0.7 W/m2K

The representative linear heat transfer coefficients (representative psi values) apply to typical frame profiles and glazing for the determination of the heat transfer coefficients UW of windows. They have been determined using the boundary conditions (frameprofile, glazing, glass mounting depth, back covering, primary and secondary sealant) defined in the ift guideline WA-08/1 "Thermally improved spacers - Part 1: Determination of the representative psi values for window frame profiles". This directive alsogoverns the area of validity and application of the representative psi values. In order to avoid rounding errors, the psi values in thedata sheet have been given to 0.001 W/mK. The method used for the arithmetic determination of the psi values has an accuracyof ± 0.003 W/mK. Differences of less than 0.005 W/mK are not significant.

October 2008 – No.14 – Revision index 0

Characteristic values determined by:

4 16 4

4 12 4 12 4

16 0.40 0.34

12 0.40 0.33

Repr

esen

tativ

e ps

i val

ue d

oubl

e-sh

eet t

herm

ally

insu

latin

g gl

ass

W/m

K

Repr

esen

tativ

e ps

i val

ue tr

iple

-sh

eet t

herm

ally

insu

latin

g gl

ass

W/m

K

Cros

s-se

ctio

n

MaterialSpacer height in mmProduct name Thermal conductivity � in W/mK Thickness d in mm

Chromatech Ultra

7Stainless steel 15 0.10

Polycarbonate 0.24 1.12

‘WARM EDGE’ WORKING PARTY

BF_Datenblaetter RZ Engl. 1008:Layout 1 10.10.2008 11:12 Uhr Seite 14