Do All Homes Have an Air Filter?

Larger homes often have more than one HVAC system, and each of these systems will usually have at least one air filter. It is important to check every possible location to make sure you have found all of the air filters in your home. The general rule of thumb is one filter for each air handler, so most homes, especially those with multiple HVAC systems, will have more than one air filter installed. These filters are usually placed near the oven or manipulator of the air conditioning system and return grilles.

They are often close to the home thermostat, in a return duct, or right next to the air handler for the air conditioning system. The air handler draws air from the home through the return duct system and then blows it through the heating or cooling system before returning it to the house through the duct system. Replacing your air conditioner filter regularly is one of the best things you can do to improve efficiency and extend the life of your HVAC. To do this, you must first know how to find it.

If you have an HVAC unit in your attic or basement, check under the removable cover of the air handler. The sheet should remain white or any shade close to it; if it turns gray, sometimes even black, it's time to change the filter. If you recently moved or bought a new home, you may be wondering where your HVAC air filters are located. In this case, they are most likely located right next to the boiler air controller or air conditioning system.

It is important to make a habit of inspecting your filter and your entire HVAC system for optimal and consistent results. If you get sick suddenly or frequently despite being at home all day with no known triggers, it could be a sign that your filters need to be replaced. Having knowledge about a wide range of home air filtration topics is essential for proper maintenance of your HVAC system. This includes understanding filtration efficiency and indoor air quality. The location of the filter makes it easy to remove debris from the air before it reaches the essential components of the HVAC system.