Well insulated air tight homes need aggressive make-up air ventilation to purge indoor pollutants and renew oxygen. Any open combustion appliance is capable of being backdrafted by more powerful exhaust devices like a kitchen hood or clothes drier.
Originally Posted by Tloganm
Homes in green grass climates with adequate fresh air ventilation and occupants that add moisture need supplemental dehumidification to maintain <50%RH during low/no cooling loads and +55^F outdoor dew points.
Using a whole house dehumidifier with the fresh make-up air ventilation option is ideal way to purge indoor pollutants, renew oxygen, and maintain <50%RH with a simple high efficiency a/c. Units like the site sponsor, Ultra-Aire whole house dehumidifier are designed for these situations.
Bear Rules: Keep our home <50% RH summer, controls mites/mold and very comfortable.
Provide 60-100 cfm of fresh air when occupied to purge indoor pollutants and keep window dry during cold weather. T-stat setup/setback +8 hrs. saves energy
Use +Merv 10 air filter. -Don't forget the "Golden Rule"