Recommended Coleman-Mach 10 RV AC w/ Heat Pump, Ducted Air Distribution Box, and Thermostat
Updated 10/06/2026 | Published 09/21/2026 >
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Question:
Hello my name Donnie Mitchell. I have a 2020 GD Momentum 348m. I have 3AC. But I am getting a flex armor roof and want to replace my center AC unit with the Coleman mach 10 heat pump version which is part number 45004-0792 I believe. What other parts do I need to accomplish this task. I also have a soft start and rv air flow on the unit that I want to carry over. Any help would be appreciated Thanks
asked by: Donnie M
Expert Reply:
Hey Donnie thank you so much for your patience. The Coleman Mach 10 Heat Pump Unit pn 45004-0792 has been replaced and it took me a couple weeks to get it added to our site. For a Coleman-Mach 10 RV AC w/Heat Pump you'll need item # CM34YR.
Here are the parts you'll need for your Grand Design Momentum:
Coleman-Mach 10 RV AC w/Heat Pump item # CM34YR
CHILLGrille Air Distribution Box item # CM48GR
Coleman-Mach WiFi Thermostat item # CM46MR or Single Zone Digital Thermostat item # CM76RR
The Coleman-Mach 10 RV AC w/Heat Pump item # CM34YR is a 15,000 Btu AC unit only with a heat pump. It measures 38" long x 26-1/16" wide x 11-7/8" tall and comes with a textured black cover.
The Coleman-Mach CHILLGrille item # CM48GR air distribution box is set up for RV's with air ducts but also has adjustable vents that can be opened to push air directly out of the ceiling assembly. The control box that sends the signals to the item # CM34YR is built into this air distribution box and it will control the heat pump.
The Soft Start Kit for Coleman-Mach RV Air Conditioners item # CM56RR is the correct one for the Coleman-Mach 10 RV AC w/Heat Pump item # CM34YR. You'll want to verify this is the model you have. The RV Air Flow should transfer over without any need for modifications. The plenums haven't changed with the new R32 systems.
What model and part number is your SoftStart? I'll be happy to confirm it's the correct one if you'll put that information below where it says, Add Comment.
Product Page this Question was Asked From
Coleman-Mach 10 RV AC w/Heat Pump - 15K Btu - Ducted/Non-Ducted - R32 - Low Profile - AC Unit Only
- RV Air Conditioners
- AC Unit Only
- Heat and Cool
- 15000 Btu
- Low Profile
- Single Zone
- Rooftop
- Ducted
- Non-Ducted
- Black
- Coleman-Mach
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