return air register with filter; make it?

Do they make a return air register with room for an air filter? The registers in my house are one stud space long - 16", and about 8 - 10" high. Thanks.
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you can likely modify one to fit, the cheap cardboard and fiberglass type.
the downside is it will decrease airflow and may raise heating and cooling costs
a friends wife has too many birds, their dander clogs the furnace filter.
he blocked completely the air return from the bird room.
no more troubles
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That's what I did. I clean them every two weeks. Sure wish they had something you could just slip in and out. It's amazing what these filters catch in the low velocity air. Thanks.
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No, there is no need for them and they can cause more flow problems than solve air quality.
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I have seen them used where a furnace is in an attic or crawl space, and the filter would be much more accessible in the dwelling unit. Whenever I have seen them, they are on systems where there is only one return grille, and they are standard size filters. Of course, since this is the ONLY filter on the furnace, it isn't any more restrictive than a filter that was at the furnace.
JK
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http://www.airguidemfg.com/rg-11.pdf
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Mcmaster-Carr sells them. http://www.mcmaster.com page 601. I'm not sure they are available in the smaller sizes. You better make sure you can find the filters to fit before you buy them. As others mentioned it will affect the balance of your system as the filters do restrict the air flow.
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