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Old 10-14-2008, 08:48 PM   #1
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Trouble finding correct filter size


I've been looking for 10"x33.75"x1" filters for my heating/air unit for a while now, and I haven't been able to find any. I've searched online and in stores, and the closest I can find is 10"x30"x1.

Will it cause any problems if I use a filter shorter than the 33.75"? Or can anyone point me in the right direction to find the correct size?

Thanks.

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Old 10-14-2008, 10:21 PM   #2
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Trouble finding correct filter size


You can probably call the mfr. of your A/C and they could either sell you one or point you to an authorized reseller or some such.

If you tried that with no luck, just curious if you were searching online using the dimensions, or with the brand/model of your A/C? You may have better luck with something like carrier AX3030M filter than the dimensions.

Quote:
Will it cause any problems if I use a filter shorter than the 33.75"?
It would probably leave a 3.75" gap on one side of the filter. Because that gap would be less restrictive than the filter, lots of air would flow through there.. Lots of unfiltered air. Not good for your A/C.

Even if your old filter's not washable, you'd probably do better blowing it off or cleaning it and putting it back in until you can find the correct replacement size..

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Old 10-14-2008, 10:33 PM   #3
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Trouble finding correct filter size


As long as it covers the opening it will be okay. If it doesn't cover the opening then you will have to find one that is closer.

If you can't find one closer then you might have to modify that filter holder.

Most of the time there is lots of leeway on the size of the filter.
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Old 10-14-2008, 11:24 PM   #4
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Trouble finding correct filter size


My choice would be to have a filter frame made and use disposable media.
You could also use two disposable filters 10x10x1 and 10x24x1
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Old 10-14-2008, 11:47 PM   #5
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Trouble finding correct filter size


If you don't mind washing one every month or so, try one of those reusable filters that you cut to size.
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Old 10-15-2008, 11:17 AM   #6
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Trouble finding correct filter size


this sounds like a filter for a fan coil unit if it slides into a return you might consider adding something onto the filter rack to get it to 30" on that lenght .the 4" won't effect the unit and if it clips up onto a fan section as FC units do you might consider a washable one cut to that actual size.oversizing the filter where it clips on is not a sin.if you want to add a filler to a rack to make it 30" cut a heavy piece of cardboard 9-3/4" and bend it 2 or 3 timeson the 9 3/4" width like an accordian to make the 4" up, and that adds a little tension when the 30" goes in. http://www.aafilters.com/ipfiberglassfilters.htm
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Old 10-15-2008, 05:58 PM   #7
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Trouble finding correct filter size


I couldn't find a name on the unit. It's up in a closet, and I'm too short to see much of anything.

I searched online using the dimensions and by just browsing filter sites.

I guess I'll have to go with getting a frame made if I can't find them somewhere.

Thanks all!
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Old 10-16-2008, 12:02 AM   #8
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Trouble finding correct filter size


Quote:
Originally Posted by mitchv View Post
I couldn't find a name on the unit. It's up in a closet, and I'm too short to see much of anything.

I searched online using the dimensions and by just browsing filter sites.

I guess I'll have to go with getting a frame made if I can't find them somewhere.

Thanks all!

PM sent with links to a site with exact matches to your size specified!
Hope i was of assistance to you in your search!
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Old 10-16-2008, 08:27 AM   #9
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Trouble finding correct filter size


Thanks Mr. Shadetree!

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