@ BGodfrey I believe that 0.4 ACH is good because you keep in the heating/cooling that you’ve just paid for.
Stale interior air is used to preheat/cool exterior air brought in through an HRV/ERV = better indoor air quality and lower utilities.
@cellulosefacts I would have preferred blown in cellulose too but maybe the builder had a deal or just prefers fibreglass?? I would hope FHB doesn’t only use products it’s given but realise the product was maybe donated/sponsored. If that’s the case there should be a statement to that fact. The basement air barrier is to provide the final side to a ‘sealed’ home. If they didn’t air would leak in.
Keep up the good fight #keepcraftalive
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