Most of your return air grilles will be located on the bottom part of your walls which makes it very convenient for homeowners to change the filters themselves. Now that we have located where our filters are, let’s talk about how changing your filters can save you money.
Much like changing the oil on your car so it last longer, your filters need to be changed every 3-4 months, although it does depend on how long your air conditioning unit has been running. By changing your filters, you are allowing your ac unit to breathe much easier and when your air conditioner is breathing easier it allows your house to be cooled much faster since it doesn’t have to work as hard, thus decreasing your air conditioning units time of operation; saving you money.
Changing your filters is not only good for the life of your ac unit, but it can increase your lifespan as well! Filters help clear the air of all the harmful particles in the air that you may not see such as dust. Below is a recent picture (8/23/2013) of an evaporator coil that saw very few filter changes. The result is cat hair and other particles that build up over time. Very nasty considering this is what you are breathing in everyday.