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Replacement for Dometic AC on 1999 Newmar Mountain Aire With Ducted Setup  

Updated 03/09/2026 | Published 01/04/2026

Question:

Is there a version like this that also has a heat pump? I am replacing the Dometic form my 1999 Newmar Mountain Aire. It is a ducted system. The RV does have a furnace, but I was hoping I could find an AC with heatpump to use less propane. Thanks for the help.

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Expert Reply:

Hey Christopher! A heat pump isn't available for the old Furrion you were referencing. Also, everything has moved from the old R410A refrigerant to R32 following the 2025 EPA regulations. Since parts aren't backwards compatible you will need a complete system replacement for your old Dometic setup. For an AC that comes with a heat pump I recommend one of the new GE Appliances AC systems. You can choose from the following:

-GE Appliances Deluxe Plus RV AC System w/ Heat Pump - Ducted - 15,000 Btu - White # GE85ZR

-GE Appliances Deluxe Plus RV AC System w/ Heat Pump - Ducted - 15,000 Btu - Black # GE75ZR

-GE Appliances Low-Profile RV AC w/ Heat Pump - Ducted - 15,000 Btu - White # GE38RR

-GE Appliances Low-Profile RV AC w/ Heat Pump - Ducted - 15,000 Btu - Black # GE26RR

Another option would be an AC system with a heat strip instead of a heat pump. All of the Advent Air systems have the option to add the Electric Heat Strip # ACMHD. These are also a little more reasonably priced. If that sounds good you can choose from the following:

-Advent Air RV Air Conditioner System - Single Zone - 15,000 Btu - White # ADV92SR

-Advent Air RV Air Conditioner System - Single Zone - 15,000 Btu - Black # ADV62SR

-Advent Air Low Profile RV Air Conditioner System - Single Zone - 15,000 Btu - White # ADV82SR

-Advent Air Low Profile RV Air Conditioner System - Single Zone - 15,000 Btu - Black # ADV54QR

Any big trips coming up with your motorhome?

expert reply by:
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Robin H
Advent Air RV AC
Advent Air RV AC
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Robin H. profile picture
Etrailer Expert

Robin H.

1/27/2026

Hey Christopher, how did things go with the GE AC system with the heat pump for your Mountain Aire? Did it give you the propane savings you were hoping for? Your update could make it easier for others upgrading older ducted setups.

Christopher B. profile picture

Christopher B.

3/7/2026

Would the Coleman Mach 8 Plus 15k BTU AC/HP work for my rig? I am replacing the roof so possible to change thermostats, etc. What is not clear also is the there seem to be other parts I must purchase but not clear what they are?

Robin H. profile picture
Etrailer Expert

Robin H.

3/9/2026

@ChristopherB you can use the # CM74MR. It looks like it was just added to our site so that is the unit only without the ADB and thermostat. Since you have a ducted system you also need the # CM36RR and # CM76RR for a complete setup.
Christopher B. profile picture

Christopher B.

3/9/2026

@RobinH Or RV has no distribution box. The ceiling inside is closed off from the AC. The AC blows directly into a plenum area and the ducting is between the roof and ceiling with individual intakes and exhaust vents.
Robin H. profile picture
Etrailer Expert

Robin H.

3/9/2026

@ChristopherB then we don't have anything available that is compatible.

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