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TOOLBOX of a CERTIFIED PASSIVE HOUSE CONSULTANT PHPP, Solar Pathfinder, WUFI, THERM
1) Energy Model, The Passive House Planning Package
2) Shading Analysis, the Solar Pathfinder
3) Moisture/Mold Risk, WUFI-ORNL
4) Thermal Bridge Analysis, THERM
A Passive House = 4.75 kBTU/ft.2/yr
1) The Whitchurch PH Cottage, 4.35 kBTU/ft.2/yr
Conventional Build, same design 90.94kBTU/ft.2/yr
Heating load on coldest days= 5,096BTU/hr= 1494 Watts= Heating system equivalent to 15, 100W light bulbs
2) Use the solar pathfinder to determine shading conditions at future location of windows
-16 Degrees from magnetic north
3) WUFI Hygrothermal Analysis
WUFI-ORNL, vented roof 7 yr.
WUFI-ORNL, unvented 7 yr.
WUFI Pro 10-Year Initial Dry-out
Shows Over 20% Moisture Content In Winter Of 1 st Year
Thermal Bridge Free= <.006 BTU/hr.ft.F Continuous thermal envelope
4) Thermal Bridge= 2D Thermal transmittance modeled in THERM minus 1D Thermal Transmittance as modeled in PHPP
Foundation Foam in THERM By Chris West, Eco Houses of Vermont
Window connection Mullion= Giant piece of metal= Giant thermal bridge
Plan View of Window Jointing Mullion In THERM
Thermal Bridge=0.16 BTU/hr.ft.F Temperature=42.6 F
Thermal Bridge=.043 BTU/hr.ft.F Temperature=49.4 F
Exterior Trim w/ EPS Thermal Bridge=.039 BTU/hr.ft.F
Performance based design
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