This allows the filter to clean the air coming from your house before it enters the hvac unit.
Is there an air filter in attic.
So there may be an air filter behind each of those return grills.
If you have a thicker filter that is 4 or more the slot should match accordingly.
All central heating and cooling systems should have an air filter but the filter can be harder to locate on some hvac units than others.
Furnace blower unit in the attic.
I have been putting filtrete 1900 at the return grill because it s easier to change and i assume that will keep the return duct cleaner.
3 arctic air filters.
The air filter might be on top below or on the side of the air handler depending on what kind of air handler you have.
The return air plenum on an attic or basement air conditioner blower unit will usually be a large metal enclosure about the same dimensions in width and height as the air conditioner blower unit itself.
What you are seeking is a 1 wide hinged or removable cover.
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Once it is located look for a slot where an air filter should fit.
3 arctic air ultra filters.
The first and possibly most important thing is to make a commitment to yourself to change your hvac filters regularly.
Don t forget some hvac systems have a return in each room.
Look for a filter slot right where the return plenum contacts the blower fan assembly marked as air filter slot and yellow arrow in my photo.
Having your hvac system in your attic isn t dire though you ll need to do some work to keep your air conditioner or furnace system running as efficiently as possible.
There are two possible locations to put an air filter for my hvac system 1.
It s generally located in your attic basement closet or crawlspace.
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Click here to see the differences between the units.
Ceiling return grill 2.
This air handler has a filter base under the unit.
Other hvac systems for any other kind of system look for the air filter behind the return air grill on the wall ceiling or utility closet door.
Typically the unit would be found in a basement an attic or sometimes in the back of a closet.
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