I live in a newer house which is air sealed to improve energy efficiency. With all the talk of indoor pollutants like CO2 and NOx, I often wonder if the air quality is worse than it would be in an older, drafty house. When I research it, most of the results on google are from companies that perform sealing, making it difficult to get unbiased answers.
If you do have a problem companies such as E. L. Foust Co. sell air filtration systems and HVAC filters which contain mixes of activated carbon and various minerals to reduce indoor air pollution. The one we've got is marketed for 500 square feet and eats 75 watts when on, so I'm not sure the plus/minus on the energy efficiency. Still, if you live in a place with wildfires or industry it is useful even if you lived in a non-sealed house.
