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Furnace Filters

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Where is my electric furnace air filter?
I just bought a house a few months ago. It was built in 1978 and still has the original furnace. I'm trying to find the air filter and can't seem to find it Any suggestions??? It's a GE furnace.I did finally find it. There is a steel box on top of the furnace that has a slide in spot where the filter goes.

1. how do i know what type of furnace air filter i have? 2. how do i replace the one that i have?

When replacing your furnace air filter which way do the arrows point towards blower or air ducts..???

Best furnace air filter home?

Why is my furnace air filter suddenly collapsing?
I have a Lennox down draft furnace. After adding a room and a couple ducts,my furnace filter collapses during use. It is not overly dirty. I am using a standard 1 inch filter. Not the mohair,but the reinforced paper. The filter has support on three sides. Is too much air now moving? There is also a small additional cold air duct installed directly above the filter. Would installing a 2 inch filter work better? Any help would be great. Thank you.

What makes the furnace air filter turn gray?

I have a headache...can it be from the new furnace air filter i installed.?
The duct work is not involved hear.

Why is my furnace air filter suddenly collapsing?
I have a Lennox down draft furnace. After adding a room anda couple ducts,my furnace filter collapses during use. It is not overly dirty. I am using a standard 1 inch filter. Not the mohair,but the reinforced paper. The filter has support on three sides. Is too much air now moving? There is also a small additional cold air duct installed directly above the filter. Would installing a 2 inch filter work better? Any help would be great. Thank you

Is the furnace air filter the same as the air conditioner filter?

Which direction does Rheem / Ruud furnace air filter go ? I see arrows, just not sure which way to put them.?
I know it goes in the direction of air flow, but I am a single mother and I am not quite sure which direction that is. I have a horizontal Ruud Rheem Furnace Air Handler combo in my attic. The filter compartment is located to the far left of the unit and to the left of it is all of the air duct flow silver stuff. Does the filter arrows point toward the actual unit right or toward the air ducts and insulation left ? Thanks, I know I sound like an idiot.....In other words do the arrows on the filter point toward the metal Ruud unit or away from the unit? If it were standing vertically instead of horizontally, the air filter would be on the bottom. Since it is laying side ways, it is to the far left. So away from the unit, or towards it ? I have gotten 2 conflicting answers already. Answer 1 and 3 are opposite in my opinion

Furnace air filter: Is a higher or lower MERV rating better?
One Aprilair filter is a MERV 8 one is a MERV 11? Which is better?