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Old 04-20-2012, 07:28 PM   #1
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Residential air handler in modular home.


Cabinet size was the biggest issue as in these modular homes the units all come in one size, 20"wide and the closet they are installed in are made exactly to size. Had a big problem having one shipped down to Houston along with all of the brackets which would've cost another arm and a leg to be able to retrofit the unit from downflow to upflow so we went with a residential upflow electric air handler, a Rheem. Biggest thing about the difference as was told to me by an employee of Baker which deals in mudular home equipment and by a Rheem service technician is that the electric heat strips on a modular air handler are placed further inside the unit, away from combustibles such as the floor. This is an upflow that I still need to build a supply plenum to attach to the duct hanging down so the combustible thing is null and void, I'd assume. Obviously I tried to get away with the old plenum but I'm a few feet short.

Any advice on what to expect? I won't ever see this thing running as it's a foreclosed home without any power but for future referance. Don't get me wrong, I'd like to always use a modular system for a modular home but getting an upflow was near impossible not to mention this was cheaper and it was available immediately.





Last edited by Doc Holliday; 04-20-2012 at 07:31 PM.
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Old 04-21-2012, 01:16 PM   #2
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Residential air handler in modular home.


Where's the drain trap? Under the home?

Are you sure the old unit was an upflow?

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Old 04-22-2012, 06:05 AM   #3
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Come on now..

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Old 04-22-2012, 06:08 AM   #4
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Old 04-22-2012, 06:10 AM   #5
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Residential air handler in modular home.


Thanks for replying BT. I'm not ever doing that again, residential upflow in a modular. For my own name's sake if nothing else.
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Old 04-22-2012, 06:16 AM   #6
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Residential air handler in modular home.


I hope the air filter isn't in the filter bracket under the air handler, and blocked by the line set and drain.
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Old 04-22-2012, 06:17 AM   #7
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Residential air handler in modular home.


But in general, the install looks nice.
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Old 04-22-2012, 04:28 PM   #8
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Quote:
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I hope the air filter isn't in the filter bracket under the air handler, and blocked by the line set and drain.

It is.

I just didn't give enough thought to it, not quite familiar with the modular homes. After the fact I realized I had about another 4" I could've pushed the air handler back into the closet. I was only thinking about the width.

I got a filter in there with a little "suggestive" bending.
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Old 04-22-2012, 04:30 PM   #9
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tsk tsk. LOL
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Old 04-22-2012, 04:34 PM   #10
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Residential air handler in modular home.


Quote:
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Where's the drain trap? Under the home?

Are you sure the old unit was an upflow?
Yup, there's a 15" duct and then a trunk line up top.

Here's what it looked like a few weeks ago, with the evaporator stolen.



And as you can see here, no ducts under the home. Btw, I found the culprit..



Yeah, the actual modular system looks so much better in there, IMO.
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Old 04-22-2012, 04:39 PM   #11
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Residential air handler in modular home.


Four houses down from that one, I installed this yesterday too and messed up installing the evaporator bracket. It's a shelf that you screw into the cabinet that the evap sits on. I put it about an inch too high so the filter is kind of being pushed up. You can't see it in the pic but I did it.


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Old 04-22-2012, 06:33 PM   #12
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Quote:
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Yup, there's a 15" duct and then a trunk line up top.

Here's what it looked like a few weeks ago, with the evaporator stolen.



And as you can see here, no ducts under the home. Btw, I found the culprit..



Yeah, the actual modular system looks so much better in there, IMO.
If there are no ducts under the house, then where does the return air come from?
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Old 04-22-2012, 06:40 PM   #13
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Residential air handler in modular home.


You see the door to the closet, with slits in it like a return air grill? That's actually the unit's front door and it's the return air in modular homes. The filter comes either on the door itself with a metal bar that holds it in place to the door on the inside, in a slit/tray on the cabinet itself like on a regular furnace (that you usually remove before installation if you have a return plenum and duct running to a grill) and then there are metal filters that actually lays on the coil itself, one on each side. Three different filter systems I've seen so far. All the air is pulled through the doors.

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Old 04-22-2012, 06:46 PM   #14
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I meant the new air handle you installed. Its designed for return to come up from the bottom of the coil. You said no duct work under it.
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Old 04-22-2012, 06:46 PM   #15
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You know what's really funny about that is these things are in little (maybe 4' x 4') utility rooms that usually are closed completely off from the rest of the home.

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