Reducing wintertime ventilation
I have an Ultra Aire ventilator and dehumidifier (80 cfm) and a Panasonic ERV (20 cfm) that deliver outdoor air into my 3,200 square foot home. The Ultra Aire is installed in the basement and dumps air into a space near the central air handler. The Panasonic is on the second floor.
During the cooling season, I can easily maintain indoor humidity between 40% and 50%. During the winter, levels typically are in the mid 20% to 30% range.
If I shut off the Panasonic ERV for the winter, my ventilation rate will be about 80 cfm. Would this be adequate for two occupants? I suspect Joseph Lstiburek would say yes (or that I should reduce ventilation even more). Not sure what Max Sherman would think.
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