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sls0303d230 karma

Air sealing lowers indoor air quality by limiting the houses ability to "breathe". Its actually believed that air tight houses are a cause for allergies ect. Energy star now requires installation of a fan running 24/7 to bring in external air in houses of a certain size.

Source: I build roughly 75 houses a year (for one of the larger home builders in the country) that are all energy star rated and independently verified