Q: Can you tell me why it is so important to install the air conditioner filter in a certain direction? What harm, if any, does it do if it's backwards? My husband always puts it in backwards. — Nancy ...

Q: Can you tell me why it is so important to install the air conditioner filter in a certain direction? What harm, if any, does it do if it’s backwards? My husband always puts it in backwards. Answer ...

Ducharme is a contributor to TIME. Ducharme is a contributor to TIME. Given that the average person in the U.S. spends 90% of their time inside, indoor air quality can have a significant impact on ...

When you shop through retailer links on our site, we may earn affiliate commissions. 100% of the fees we collect are used to support our nonprofit mission. Learn more. In our tests, we gauge how well ...