WUFI

The "Asphalt Shingle System" has a perm-in rating of 0.0472, meaning that it would have a perm rating of 0.3. This seems low--don't most asphalt shingles have a perm rating of around 0.9? (http://www.owenscorning.com/NetworkShare/Roofing/10013915-Deck-Defense-Technical-White-Paper-October-...

Forgive me for using IP units, but I think I may have found a conversion error with regard to the "floating indoor temperature shift" input under ASHRAE 160 user-defined climate. Assuming this is meant to represent the dead-band temperature range, I would want to list 2.5 degrees C, or 5 d...

Is it possible to add ducts to a location outside the conditioned space (e.g., attic) by somehow: -Adding a small amount of air exchange (duct leakage) when space-conditioning is called for -Accounting for duct (and insulation) surface temperature, which would be dependent on space-conditioning sche...