Fresh air ventilation is the most important component of indoor air quality. Suggest an air change in 4 hours for normal space. Maintaining <50%RH is the next. Merv 11 air filtering is also important.
Air conditioning and heating is also nice.
Check out the Ultra-Aire whole building dehumidification.
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"