The Coleman Mach 8330D735 is the factory-matched ceiling assembly for lateral ducted Coleman Mach RV air conditioning systems. Designed specifically for heat-ready setups, this white ceiling box delivers the proper airflow distribution for laterally ducted coach interiors -- no thermostat included, giving you full flexibility to pair it with the wall thermostat or digital control of your choice.
When your Coleman Mach air conditioner feeds conditioned air through lateral ducts running along the ceiling of your RV, you need a ceiling assembly that is purpose-built for that configuration. The 8330D735 is not a universal box -- it is engineered to work specifically with lateral ducted Coleman Mach units, ensuring proper plenum fit, correct duct outlet positioning, and a clean white finish that matches factory interiors.
Installing the wrong ceiling assembly on a lateral ducted system can result in poor airflow balance, duct misalignment, or visible gaps between the assembly and your coach ceiling. The 8330D735 eliminates that guesswork. If your existing ceiling assembly is cracked, discolored, or damaged, this is the direct OEM-style replacement to restore your system's appearance and performance.
Built exclusively for lateral duct RV air conditioning systems -- not compatible with non-ducted or center-ducted setups.
Compatible with Coleman Mach heat pump and heat strip configurations -- no modification needed when adding heat capability.
Ships without a thermostat, letting you pair with your existing Coleman Mach wall thermostat or upgrade to a digital control.
Clean white finish matches standard Coleman Mach ceiling assemblies and blends with most RV interior ceilings.
The 8330D735 is designed to accommodate both heat pump and electric heat strip configurations in the Coleman Mach system. If you are upgrading from a cool-only setup to a heat-ready unit, or replacing a damaged ceiling assembly on an existing heat-capable system, this assembly supports those configurations without requiring a separate adapter kit.
Lateral ducted RV air conditioners distribute conditioned air through ducts that run along the sides of the ceiling cavity rather than through a single center diffuser. The ceiling assembly for a lateral ducted system has its outlet ports positioned accordingly. If your coach uses a center-ducted or non-ducted (return air) configuration, this assembly will not fit or function correctly. Check your existing ceiling assembly label or your AC unit's model tag before ordering.
This ceiling assembly does not include a thermostat, wall control, or wiring harness. If you are replacing a complete ceiling assembly that previously included a thermostat, you will need to order the appropriate Coleman Mach wall thermostat separately. Analog, digital, and heat/cool thermostats are available -- confirm compatibility with your specific Coleman Mach AC model before purchasing.
UV exposure, age, and physical damage can cause RV ceiling assemblies to yellow, crack, or warp over time. The 8330D735 is the correct replacement for Coleman Mach lateral ducted units that originally shipped with this assembly. If you are unsure whether this is the right replacement, compare the part number on your existing ceiling box or cross-reference your AC unit's model number against Coleman Mach's application guide.