Exhaust-only ventilation assumptions
Is it the assumption of exhaust-only ventilation that between meterological factors and normal use of bathroom fans, dryers, and range hoods, you will have sufficient air changes in a day to have good indoor air? Since getting a few IAQ monitors recently, I have noted I am not happy with normal, undirected use with my family of 7 (6 homeschooling most of most days) in 2000~ ft2, but am generally happy with the numbers from my dad’s 3800 ft2 home with 7 people in it (5 homeschooling most of most days). I am extrapolating from that that our typical customer with between 600-1500 ft2 per person is probably doing ok, albeit dealing unconsciously with whatever comes into the house with infiltration.
P.S. Until I get my ERV, I have hit upon the practice of continuously running my master shower fan on low (80cfm), and that is more than sufficient to maintain and improve our CO2 levels.
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