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20 x 25 x 4 Air Filters for AC/Furnace..
#12
[quote h'][quote Pat]Air flow is towards the furnace.
Or to the left in your instance.
I've tried to talk way too many people through stuff to assume what someone else's perspective is. Especially when you're not physically in the same place.

I can take "On my installation the furnance is on the left, the air filter holder next, then a big tin box is next." as the furnace is on MY left, then the next thing is the filter slide, then the plenum. In which case airflow would be to the right.

Doesn't matter where the furnace is, just point the arrow on the filter towards it.
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Re: 20 x 25 x 4 Air Filters for AC/Furnace.. - by Pat - 11-27-2007, 02:39 PM
Here's a free Filtrete A/R from 3M - by Psurfer - 11-27-2007, 04:29 PM

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