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Old 08-28-2017, 08:24 PM   #1
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Couple HVAC questions, CS

On a CS the air filters are round disk that are sponge like. Do you simply clean these or switch to a different type? Somewhere I saw some filter like disk that supposedly filtered better while allowing more are flow...?

The round vents blow air in two directions and can not be closed. Does anyone know the brand or where I may get replacements that have adjustable shutters and may be closed?

Thx,
Steve
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Old 08-28-2017, 08:38 PM   #2
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Red face

Quote:
Originally Posted by StevL View Post
that supposedly filtered better while allowing more air flow...?

Thx,
Steve
You cannot have better filtration AND better flow. You may have one or the other but NOT both. A better filter will have a tighter weave to the filter media to trap dirt better but that tighter weave will restrict air flow (a lot)
IMHO
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Old 08-28-2017, 08:41 PM   #3
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I wash mine in the sink with Dawn and then rinse well and let dry and then reinstall. They filter out the dust in the air. Seem to do a good job. I wouldn't recommending removing them.
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Old 08-29-2017, 12:42 AM   #4
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Couple HVAC questions, CS

Steve....
Those are the return air filters, and they are fine for the job they are required to do. Do not put them on the outlet registers. Millerj is right- just rinse in the sink periodically with the sprayer through from the backside to push the dust off.
I've been told by a couple of techs that it is a bad idea to close off vents. I'm told it tends to disrupt the proper op of the unit.
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Old 08-29-2017, 07:37 AM   #5
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Steve....
Those are the return air filters, and they are fine for the job they are required to do. Do not put them on the outlet registers. Millerj is right- just rinse in the sink periodically with the sprayer through from the backside to push the dust off.
I've been told by a couple of techs that it is a bad idea to close off vents. I'm told it tends to disrupt the proper op of the unit.
I agree. Don't try and make a simple/efficient system overly complicated. These hvac systems are very efficient in what they are required to do and in general should not be altered to any great extent. You can go to any big box store and buy 2-3 sheets of the same type ac filter material in a package for a couple of bucks and make a several extra sets of these buy tracing one of your existing disks. We simple replace ours every 1-2 months and wash/dry the dirty ones.
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Old 08-29-2017, 07:45 AM   #6
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I rinse and replace. However, I also purchased a sheet of the foam material at Lowes. It's usually sitting on the shelf next to the room air conditioners. I cut disks and swap while the others are being washed and dried. The stuff I use is called Frost King Window Air Conditioner Filter 15" X 24" X 3/16" thick.

BTW, I have a few vents (the slotted piece) that have broken center retainers. I use these on Return Vents and cut new filters that are slightly elliptical. The ellipse allows a small amount of foam to hang over the edges and it holds the vent in place.

Also, if you have too much airflow in a certain location, some folks have inserted an old CD or DVD behind the vent. Blocking 1 or 2 exhaust vents does no harm ... it just diverts the air a bit. Keep the intakes clean and unblocked.
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Old 08-29-2017, 08:22 AM   #7
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Here is a quick way to clean your filters...
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Old 08-29-2017, 09:22 AM   #8
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If you shut too many supply vents you will cut down on the CFM across the evaporator. This will cause the unit to freeze. You will know, when it gets warm inside and you don't feel much air coming out.
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Old 08-29-2017, 10:02 AM   #9
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Thanks for the replies.

I wasn't thinking about closing the returns.

On our "other" coach we used to close a few ac vents up front at night forcing more air into the bedroom and not running the rear air, it's just less noise.

Makes sense, you filter more you restrict more air.

I just felt like I have more directional control if the louvers were adjustable and not fixed 180 degrees from each other.


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Old 08-29-2017, 02:11 PM   #10
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Thanks for the replies.

I wasn't thinking about closing the returns.

On our "other" coach we used to close a few ac vents up front at night forcing more air into the bedroom and not running the rear air, it's just less noise.

Makes sense, you filter more you restrict more air.

I just felt like I have more directional control if the louvers were adjustable and not fixed 180 degrees from each other.


Steve
Yup ... thought about it but couldn't find a reasonably priced set of replacements (11 return and 11 cold air ... 22 total vents). I have found that it helps to make sure your cold air is not aimed at a return. Takes some time but you can fine tune.
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Old 08-30-2017, 12:15 AM   #11
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Check out RVAIR.com. They have round filter replacements that actually clean the air. They also have a charcoal model that filters odors.

They come four to a box for about $20. My coach uses eight filters. I think Amazon may have them now, but the web site can take care of you.

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Old 08-30-2017, 12:42 AM   #12
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Here is a quick way to clean your filters...

Spend $200 for a vac to use cleaning $5 worth of filters. Might happen.
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Old 08-30-2017, 08:51 AM   #13
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Spend $200 for a vac to use cleaning $5 worth of filters. Might happen.

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Old 08-30-2017, 03:42 PM   #14
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Spend $200 for a vac to use cleaning $5 worth of filters. Might happen.

Or not.
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