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01-30-2018, 03:58 PM
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#1
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Junior Member
Join Date: Jan 2018
Posts: 11
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2nd air conditioner on 297RST
I ordered a Dometic a/c unit to install over the bedroom on my 2015 297RST but could not install it because the distance from the wall separating the bathroom & bedroom was too close. The air distribution/control box won't fit on the ceiling because it is too large. There is only 5.75 inches from the cutout to the wall. Anyone have ideas of which a/c manufacturer makes a smaller unit that will fit?
Thanks
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01-31-2018, 07:32 AM
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#2
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Senior Member
Join Date: Jan 2016
Location: x
Posts: 12,423
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Why not center the new AC over the bed? It would require you cutting to fit
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01-31-2018, 09:10 AM
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#3
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Junior Member
Join Date: Jan 2018
Posts: 11
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The hole is already factory cut & has an existing vent & is prewired for a/c.
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01-31-2018, 09:17 AM
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#4
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Senior Member
Join Date: Jan 2016
Location: x
Posts: 12,423
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You best bet may be to contact the factory and ask what unit they install in that position, unless it was designed for a fan only installation.
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01-31-2018, 09:21 AM
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#5
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Junior Member
Join Date: Jan 2018
Posts: 11
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I already contacted them. The service rep said she couldn’t recommend anyone’s a/c unit. Thanks
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01-31-2018, 10:29 AM
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#6
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Senior Member
Join Date: Jun 2012
Location: Southern NM
Posts: 9,565
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I believe there is usually a size difference on the ceiling assembly air distribution panel between ducted and non-ducted. We used a low profile Penguin II ducted and the inside portion is fairly small. Might check out the dimensions on their webpage. Good luck!
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Scott and Liz - Southern NM
2012 Wildcat Sterling 32RL - w/level up (best option ever)
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01-31-2018, 11:29 AM
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#7
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Junior Member
Join Date: Jan 2018
Posts: 11
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Ya. The one I need will be non-ducted. Great. Thanks
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01-31-2018, 11:36 AM
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#8
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Senior Member
Join Date: Jun 2012
Location: Southern NM
Posts: 9,565
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Quote:
Originally Posted by jcairns57
Ya. The one I need will be non-ducted. Great. Thanks
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Just curious as to why non-ducted? In my limited experience (installed second a/c on two different units) the units that were pre-wired also had access to the duct system. Just had to remove blocker plate and/or insulation.
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Scott and Liz - Southern NM
2012 Wildcat Sterling 32RL - w/level up (best option ever)
2007 Chevy 2500HD Duramax
Reese Fifth Airborne Sidewinder
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01-31-2018, 11:42 AM
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#9
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Junior Member
Join Date: Jan 2018
Posts: 11
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I’ll have to check. I didn’t see a blocker plate in there when I took the vent out. I’ll double check tho. Thanks
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01-31-2018, 11:46 AM
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#10
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Senior Member
Join Date: Jun 2012
Location: Southern NM
Posts: 9,565
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I have read that in some units, the 'duct' is just a gap in the hard foam insulation. Might check if your existing vents are attached to an actual duct or not.
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Scott and Liz - Southern NM
2012 Wildcat Sterling 32RL - w/level up (best option ever)
2007 Chevy 2500HD Duramax
Reese Fifth Airborne Sidewinder
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01-31-2018, 12:11 PM
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#11
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Junior Member
Join Date: Jan 2018
Posts: 11
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Support from Forest River just returned my call. It’s gotta be a non-ducted unit.
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01-31-2018, 12:15 PM
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#12
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Phat Phrog Stunt Team
Join Date: Apr 2012
Location: Tipp City, OH
Posts: 7,154
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Quote:
Originally Posted by NMWildcat
I have read that in some units, the 'duct' is just a gap in the hard foam insulation. Might check if your existing vents are attached to an actual duct or not.
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I would say that in most units, the duct is just a channel in the ceiling and the the vents are only connected to the ceiling material itself. If you look at the vents, they are usually in a fairly straight line front to back. See what side of the hole the vents are on and knock out that block to access the channel. If you want to double check before knocking the block out, drill a hole in it, plug a few vents, and turn your existing ac fan on. You should feel the air.
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01-31-2018, 12:26 PM
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#13
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Senior Member
Join Date: Jun 2012
Location: Southern NM
Posts: 9,565
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Quote:
Originally Posted by jcairns57
Support from Forest River just returned my call. It’s gotta be a non-ducted unit.
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Well dangit. It was worth a shot
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Scott and Liz - Southern NM
2012 Wildcat Sterling 32RL - w/level up (best option ever)
2007 Chevy 2500HD Duramax
Reese Fifth Airborne Sidewinder
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01-31-2018, 12:45 PM
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#14
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Senior Member
Join Date: Jan 2011
Location: Part Timing It Now
Posts: 3,457
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Quote:
Originally Posted by AquaMan
I would say that in most units, the duct is just a channel in the ceiling and the the vents are only connected to the ceiling material itself. If you look at the vents, they are usually in a fairly straight line front to back. See what side of the hole the vents are on and knock out that block to access the channel. If you want to double check before knocking the block out, drill a hole in it, plug a few vents, and turn your existing ac fan on. You should feel the air.
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This is true however, there needs to be a "return air" duct running from side to side. Two return air vents then have to be cut into the ceiling just inside the 2 outer sidewalls at the ends of the return duct. To do this type of install correctly probably would require pulling ceiling panels down to install the return duct system & tie into the existing cold air outlet duct system.
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01-31-2018, 01:06 PM
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#15
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Senior Member
Join Date: Jun 2012
Location: Southern NM
Posts: 9,565
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Quote:
Originally Posted by rracer5
This is true however, there needs to be a "return air" duct running from side to side. Two return air vents then have to be cut into the ceiling just inside the 2 outer sidewalls at the ends of the return duct. To do this type of install correctly probably would require pulling ceiling panels down to install the return duct system & tie into the existing cold air outlet duct system.
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Return air routed through 14" x 14" hole a/c and ceiling attachment (air distributor) is mounted to.
__________________
Scott and Liz - Southern NM
2012 Wildcat Sterling 32RL - w/level up (best option ever)
2007 Chevy 2500HD Duramax
Reese Fifth Airborne Sidewinder
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01-31-2018, 01:20 PM
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#16
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Junior Member
Join Date: Jan 2018
Posts: 11
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Thanks guys. Found a solution. [emoji106]
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01-31-2018, 01:38 PM
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#17
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Senior Member
Join Date: Jun 2012
Location: Southern NM
Posts: 9,565
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Quote:
Originally Posted by jcairns57
Thanks guys. Found a solution. [emoji106]
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Share solution please!
__________________
Scott and Liz - Southern NM
2012 Wildcat Sterling 32RL - w/level up (best option ever)
2007 Chevy 2500HD Duramax
Reese Fifth Airborne Sidewinder
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01-31-2018, 01:40 PM
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#18
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Phat Phrog Stunt Team
Join Date: Apr 2012
Location: Tipp City, OH
Posts: 7,154
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Quote:
Originally Posted by NMWildcat
Return air routed through 14" x 14" hole a/c and ceiling attachment (air distributor) is mounted to.
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I concur!
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2016 Georgetown 364TS
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01-31-2018, 03:43 PM
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#19
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Junior Member
Join Date: Jan 2018
Posts: 11
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Coleman Mach 3 with series 9000 ceiling air diverter/controller. Small enough to fit between wall & roof cutout.
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01-31-2018, 04:52 PM
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#20
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Casey & Carolyn
Join Date: Jan 2017
Location: Las Vegas Nv
Posts: 171
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Quote:
Originally Posted by NMWildcat
Just curious as to why non-ducted? In my limited experience (installed second a/c on two different units) the units that were pre-wired also had access to the duct system. Just had to remove blocker plate and/or insulation.
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Scott
What did you do about a thermostat. I have not looked at the duct work but I did pull out the vent and I have 110 volts there no other wiring. I assumed since I did not see thermostat wiring it was not ducted. I did see thin pylwood on the side that would be closest to the ducting but did not remove it. Wanting to add second a/c.
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