Air tightness & testing?
The common method of expressing test results of air tightness tests is air changes per hour. @ 50 pascals. How is the building volume calculated? Does it include exterior wall volume (use outside dimensions)? Does it include an unheated basement? or crawlspace? In testing are vents for ventilation systems (HRV.ERV) capped? Are dryer or range vents capped? What is “state of the art” air tightness? What are best known test results?
GBA Detail Library
A collection of one thousand construction details organized by climate and house part