Recommended 18K Variable-Speed AC System w/ Thermostat that Actually Works w/a Existing Furnace
Updated 08/22/2026 | Published 08/16/2026
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Question:
Good evening. I am looking for a 18K replacement AC system with a thermostat that actually works with an existing furnace. I do not want to add an additional thermostat to control my furnace which is what was recommended to me when I was looking at the chill cubes. thanks for your time
asked by: James
Expert Reply:
Welcome back James! I recommend the Mach-C Everest Variable Speed RV Air Conditioner System item # CM35MR in white or item # CM55MR in black. These are complete AC systems that include an 18k variable speed air conditioning unit, an air distribution box that works in both ducted and ductless orientations, and a thermostat that will control an existing furnace.
Unlike the Chill Cube thermostats, the one included with the Mach-C Everest Systems can indeed directly control the furnace settings. The 12v trigger wire on your furnace will connect directly to the system allowing you complete control for your AC and heat.
What kind of RV do you have and what climates do you typically camp in? Feel free to answer this and throw in any other questions you have, where it says Add Comment.
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Product Page this Question was Asked From
Mach-C Everest Variable Speed RV Air Conditioner System - 18K Btu - Ducted/Non-Ducted - R32 - White
- RV Air Conditioners
- Complete AC System
- Cool Only
- 18000 Btu
- Standard Height
- Single Zone
- Rooftop
- Ducted
- Non-Ducted
- White
- Coleman-Mach
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James
8/22/2026
Thank you