The factory-matched ceiling assembly plenum for Coleman Mach non-ducted rooftop air conditioners. Designed to mount flush against your RV ceiling and work with a wall-mounted thermostat, this black plenum restores the finished interior look and proper airflow distribution of your Coleman Mach AC system without a full unit replacement.
When your existing ceiling assembly is cracked, warped, faded, or damaged, replacing just the plenum is far more practical than swapping the entire rooftop unit. The Coleman Mach 9430-4572 is a direct OEM replacement plenum designed for non-ducted installations -- meaning the conditioned air is delivered directly into the RV cabin through the ceiling assembly rather than routed through a duct network.
This plenum is finished in black to match black-interior Coleman Mach ceiling assemblies. It integrates with wall thermostat wiring, making it compatible with the most common Coleman Mach control configurations. The unit ships as the plenum housing only -- no thermostat, control board, or hardware kit is included.
Delivers conditioned air directly into the cabin -- no ductwork required. Ideal for smaller RVs and straightforward retrofits.
Wired for use with a separate wall thermostat, keeping controls at eye level and preserving your existing thermostat investment.
Matches black-trim Coleman Mach ceiling assemblies for a clean, factory-matched interior appearance after replacement.
Coleman Mach part 9430-4572 -- order with confidence knowing this is the correct OEM-specified assembly for compatible units.
A non-ducted ceiling assembly (also called a ceiling distribution box or plenum) is the interior portion of a rooftop RV air conditioner that mounts to the ceiling cutout inside the coach. It houses the evaporator coil blower fan, air return grille, and discharge louvers. In a non-ducted setup, cooled or heated air is blown directly into the living space through the plenum -- there are no ducts running to vents in other areas of the RV.
This type of setup is the most common configuration in Class A, Class C, and fifth-wheel coaches that rely on a single-zone rooftop unit. Non-ducted assemblies are simpler to service and replace than ducted alternatives.
If your rooftop condenser and compressor are still functioning correctly but your interior ceiling assembly is damaged or worn, replacing the plenum alone is the cost-effective solution. The 9430-4572 gives you a factory-correct fit without the labor or expense of a full rooftop unit replacement.
The 9430-4572 ceiling assembly is designed to fit most Coleman Mach rooftop air conditioner models that use a non-ducted ceiling configuration and wall thermostat wiring. Compatible Coleman Mach unit families typically include:
Always verify your existing ceiling assembly part number before ordering. The rooftop unit model number is typically found on a label inside the rooftop shroud or on the unit's control box.
This ceiling assembly is configured for use with a wall-mounted thermostat. It does not include an integrated manual control head. If your current setup uses a manual control on the ceiling assembly itself, verify that this plenum matches your thermostat wiring before purchasing.
The 9430-4572 plenum mounts to the existing ceiling cutout in your RV and connects to the rooftop unit via the standard Coleman Mach mounting gasket and bolt pattern. Typical installation involves:
No rooftop access is required for the ceiling assembly swap in most installations. A basic set of hand tools is sufficient for most DIY RV owners.
When replacing your ceiling assembly, take the opportunity to clean the evaporator coil fins and drain pan on the rooftop unit. Debris buildup in those areas reduces cooling efficiency and can cause condensation leaks into the new plenum housing.
If your thermostat is aging alongside the ceiling assembly, pairing this plenum replacement with a new Coleman Mach or compatible digital wall thermostat is a practical upgrade. Programmable wall thermostats compatible with Coleman Mach systems are available separately on rvupgradestore.com.