air conditioner filter vent question


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Old 03-12-20, 12:58 PM
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air conditioner filter vent question

I have a Colman Evcon HVAC M# AG08012C.The filter is located on the corner adjacent to another vent. I was told this was the way this system works but it doesn't seem right to me. Wouldn't it be pointless to have a filter if air is coming through the other vent?

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Old 03-12-20, 04:30 PM
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If the vents are discharge and no other filters exist, install.

If the vents are air returns, no filter needed!
 
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Old 03-12-20, 05:42 PM
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You were told by whom? The clueless previous occupant, perhaps? I have seen filters in vents put there by people who didn't know where the filter was actually supposed to be. I am not familiar with your Coleman and failed to find useful info for that model number. But turn off the furnace and take off access panels and see whether you can find the correct filter location inside it.
 
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Old 03-13-20, 07:20 AM
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Thanks for the reply's. I was told to use a 10x 24x 1 filter(in bottom pic) that I had to order online because no stores carries it. I just find it strange that the filter vent is right next to another vent with no filter, and both vents are connected to the system. Wouldn't I have to block the other vent so the system is properly filtered?
 
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Old 03-13-20, 07:30 AM
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Is the bottom pic looking into the duct work which goes directly into the furnace? How big is that return?
Geo
 
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Old 03-13-20, 07:30 AM
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See post #2, is it supply or return?
 
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Old 03-13-20, 08:58 AM
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Yes it goes directly into the furnace and I'm not sure what you mean by supply or return. I'm new to this
 
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Old 03-13-20, 09:27 AM
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Supply means a vent pushing (supplying) air into a room. Return means a vent sucking (returning) air to the furnace.

(Oddly, this is the opposite of swimming pool terminology, where a return returns water to the pool. But that's not important now.)

As you say, it makes no sense to filter one vent and not the other, since they share a common duct. If it is a return duct, there may be some utility to putting filters in both vents in order to prevent dust in the return ducts. Just remember to change the filters periodically.

But I still encourage you to open up the furnace access panels. The are typically secured with easily hand-turnable round screws. Look inside; that's probably where the filter is really supposed to be.
 
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Old 03-13-20, 09:47 AM
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Thanks for the clarification. I looked at the system and cant find any other filter. The system was installed in 93 so I think its on its way out. I'm just going to have a professional look at it.Thanks everyone for the help
 
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Old 03-13-20, 10:03 AM
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That looks like a common plenum area. That means both registers are return air and both should have filters in them. I can see it's an old house by the type of wiring. Is the furnace inside that common plenum area ?
 
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Old 03-13-20, 01:48 PM
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Yes its in the door under the vents. I'm not sure what other filter I would use for the other vent?
 
 

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