If you own a home, then chances are you are familiar your A/C air filter, if for no other reason than you've had to change it from time to time. In the past, you had to kind of guess based on the rating of the filter when it was time to change it, but newer digital thermostats will actually give you a visual indicator that a filter needs to be replaced. The A/C air filter in your A/C system performs the extremely important job of removing particles from the air stream to keep the air … [Read more...]