Will Coleman Mach 3 AC Rooftop Unit Work On Small Camper Build Instead Of Full Complete AC System?

Published 05/13/2026

Products Featured in This Question

Coleman-Mach Signature Mach 3 RV Air Conditioner - 13.5K Btu - Ducted/Non-Ducted - R32 -AC Unit Only

(3)

$1026.61

Coleman-Mach Deluxe Air Distribution Box for Non-Ducted RV Air Conditioners - White - R32

(1)

$152.00

Electric Heater Kit for Coleman-Mach Medium and Low-Profile RV Air Conditioners - 120V

(7)

$85.89

Question:

I saw the Coleman-Mach Mach 3 is just the rooftop unit. If I’m doing a fresh ductless install on a small camper, can I still use it, or should I buy a full system instead?

asked by: Amelie

Expert Reply:

Hey Amelie! You can still use the Coleman-Mach AC system # CM97RR for a ductless install, but you’ll need to add the correct air distribution box since the rooftop unit does not include the inside ceiling assembly.

For a ductless setup, pair # CM97RR with the Coleman-Mach Deluxe Air Distribution Box # CM46RR. That gives you the rooftop 13,500 Btu unit plus the ceiling assembly needed for direct airflow into the camper. If you want light electric heat later, the Coleman-Mach heater kit # CM96RR can be added too. Are you using an existing 14-1/4 inch roof opening, Amelie, or cutting a new one? If cutting a new hole in a diy RV build, you'll need to make sure the roof is between 2-1/2 - 5" thick for proper installation.

expert reply by: Andrew N