So why does your AC have two filters? If you live in a large home, there’s a good chance your system requires more than one return air duct. And each duct requires a filter to stop particulates before they get to your blower motor. Or, you have a system that has multiple AC units.
Can I put 2 filters in my AC unit?
You should never stack air filters.
Even though you might think that the air would get cleaned a bit better if you have two filters side by side that is not exactly the case. It would become a lot harder for the HVAC system to suck in enough air.
Feb 24, 2022
Why does my AC have 2 filters?
Scenario 1: Your HVAC system has multiple return ducts.
This is the most common reason why your central air system has two air filters.
What are the two air filters?
These units are broken up into two different systems: up-flow and down-flow. Up-flow draws cool air from the bottom and forces heated air through the top. The filter in this system is most likely located at the bottom of the HVAC unit. Down-flow draws cool air from the top and forces heated air out from the bottom.
May 17, 2019
Are there multiple air filters?
The air filter is typically located at the point where the return duct enters the air handler. Larger houses often have more than one HVAC system. Each system will typically have at least one air filter. Therefore, your home may have air filters located at the air handler AND in the returns.
Are 2 filters better than 1?
Well, the thicker the filter the less restrictive it is. This contributes to a better flow of purified air. This means that 2-inch furnace filters allow a better flow of air than 1-inch filters.
