Passive House Institute
Dr. Wolfgang Feist
64283 Darmstadt
GERMANY
Certified Passive House Component
for cool, temperate climate, valid until 31.12.2015
Category:
Manufacturer:
Product name:
Attic staircase
Wellhöfer Treppen GmbH & Co.KG
97084 Würzburg, GERMANY
Passive House Attic Stairs
This certificate was awarded based
on the following criteria:
Representation of the
Passive House Attic
Stairs
A given component size of 1.40 m by 0.70 m results in:
UD
= 0.77 W/(m²K)
≤
1.00 W/(m²K)
Isothermal map of the
Passive House Attic
Stairs
Taking the installation situations into account, the component
meets the following criterion.
UD,installed
≤
1.10 W/(m²K)
≥
0.70
Functional requirements of hygiene:
fRsi = 0,25 m²K/W
Isothermal map
installation in concrete
ceiling
Following thermal bridge coefficients Ψ [W/(mK)]
have been determined:
Thermal bridge coefficient
Ψ [W/(mK)]
UD,installed [W/(m²K)]
Wooden- beam
ceiling
Concreteceiling
-
0.04
0.08
-
0.94
1.10
-
Description
Chipboard (λ = 0.136 W/(mK)) with insulation panel (λ = 0.039 W/(mK))
with two EPDM sealings between frame and insulation panel. A sealing
tape is installed in between the hatch and the ceiling. An insulation
filling (λ = 0.04 W/(mK)) for reducing the thermal bridge of the
installation to the connection of the hatch is inserted.
Please ask the manufacturer for a detailed report containing all
calculations and results.
www.passivehouse.com
Pilotcertificate
Isothermal map
installation in woodenbeam ceiling