Question about furnace filter

1,064 Views | 8 Replies | Last: 4 yr ago by EcoZapp.AC&Air.Purifiers
Seersucker Ag 2011
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AG
Question about furnace filters from an idiot:

With the cold weather coming, I'm attempting to replace furnace filters, as I'm told I should do, and should have done many times since owning my house.

I've gone into the attic and looked at both systems (upstairs and downstairs) and have no clue where a filter would be. I've watched countless videos online and am unable to find systems that look anything like mine. I have a Carrier and a Coleman (yes, they make systems for houses that aren't on wheels). Each system has a door in front that opens to the computer but I see no filter or anywhere that a filter would go.

What am I missing? Does the fact that I have return air grilles mean I won't have filters to change in the attic? Probably a stupid question but I know nothing and I'd appreciate any help. Thanks!
Sweet Kitten Feet
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S
Your filter might be in the return. Mine are. Shine a light into the return and see. You should be able to tell without even opening them, but opening is easy.
Seersucker Ag 2011
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AG
I do have filters in the return air grille, and I change those every few months. Is that what you mean? If I have filters there, do I not also have filters in the system in the attic?
Sweet Kitten Feet
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S
You likely do not have fillers in your attic then. They're usually one or the other. Use a quality pleated filter and change at least every 3 months. More often during period of high use.
Sazerac
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AG
I think most just have return filters.

house I just moved into has 1" return (change 1-3 months) AND a 4" furnace filter (6 months) for both units. I thought that was pretty strange and not sure it's necessary or even good (too much static pressure?).

EcoZapp.AC&Air.Purifiers
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We end up seeing a lot of 20 year old Furnace filters that have never been replaced.. Most don't know they exist
Sazerac
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AG
so many systems today will have both?
Seersucker Ag 2011
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AG
EcoZapp.Makes.Crisp.Air said:

We end up seeing a lot of 20 year old Furnace filters that have never been replaced.. Most don't know they exist
Yep, that's my fear!
Dr. Venkman
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AG
cclearman said:

I think most just have return filters.

house I just moved into has 1" return (change 1-3 months) AND a 4" furnace filter (6 months) for both units. I thought that was pretty strange and not sure it's necessary or even good (too much static pressure?).
This is what I do. $1 filter in the return every month. 4" filter at the unit every year. I can see through the cheap 1" one so I assume it doesn't cause any air flow issues. Just there to collect big stuff.
EcoZapp.AC&Air.Purifiers
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- If you have a media filter , we change those every 6 months- and advise to buy the cheapest for the 1 inch ' IF any'.

A Good Filter + a Media Filter will usually strain the system and cause issues latter.

A Cheap Filter catching pet hair is good though.
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