Recent Q&A

• U-value calculation of glazing on custom windows

  In the midst of a micro-cabin SIP build that uses very custom sized windows and doors. The frames have been built and are awaiting the custom-ordered glazing. I've searched all…

• When insulating a portion of a structure such as an addition or re-roof, how can code compliance via the performance analysis method (ref MEC 402.2) be demonstrated without doing a whole-house analysis?

  Architect and code official are obsessed with the prescriptive method. I want to use a solid foam nailbase system with better overall performance and a thinner profile. How can I…

• Can anyone recommend a manufacturer that makes an in-line duct fan that is bidirectional?

  I have an 8" ducted de-stratification system and would like a single fan (hopefully very quit) with a three position switch. The open floor plan two story structure in WV…

• What percentage of total heat loss is through air leakage?

  I'm looking for modeling or test data that defines the ratio of convective losses to conductive losses. My real goal is to find the tipping point when a leaky building…