There are a a variety of signs you should consider house ventilation, including:
1. Stubborn odors
If you have issues getting potent smells out of your house, you may have a ventilation concern.
2. Stale air
The air in your home should feel fresh, but stuffy zones mean you may have inadequate ventilation.
3. Lots of dust
Dust can build up more rapidly in areas with poor ventilation.