Your home’s air could be 100 times worse than the worst outdoor air.
You have to buy something technical and the salesperson is throwing about 100 different jargon words at you.
Would you say the air in your home is cleaner or dirtier than the air outside?
If you have a home built before 1982, your home’s attic is probably under insulated.
You may hear contradicting information about when to change your air conditioner's air filter.