The factory-grade interior ceiling component for Coleman Mach lateral ducted air conditioner systems. This heat-ready assembly integrates seamlessly with compatible Mach 8 and Mach 15 units, delivering clean airflow distribution and a finished interior look without aftermarket modification.
When your existing ceiling grille or distribution box cracks, discolors, or fails to seal properly, cool and heated air escapes into the ceiling cavity instead of reaching your living space. The Coleman Mach 8430A635 is the OEM-sourced replacement ceiling assembly engineered specifically for lateral ducted installations -- where conditioned air exits through side ducts rather than a central ceiling plenum.
Sold under part number CMN8430A635 (UPC 755790203536), this "Deluxe ChillGrille" assembly includes the full interior ceiling box with integrated grille and airflow louvers. The heat-ready designation means it is rated to handle warm air output from heat pump or electric heat strip-equipped Coleman Mach units -- not just cooling air.
Engineered to handle both cooled and heated airflow from compatible Coleman Mach heat pump and heat strip systems.
Routes conditioned air through side ducts for even distribution -- ideal for coach layouts with multiple duct registers.
Direct-fit replacement sourced from Coleman Mach. Part number CMN8430A635 matches original factory specifications.
Neutral white color blends with standard RV ceiling decor. Resists yellowing under normal UV and temperature exposure.
Coleman Mach air conditioners come in two main interior configurations: non-ducted (air flows directly down through a ceiling grille into one zone) and ducted (air is channeled through ductwork to registers throughout the coach). Within ducted systems, "lateral ducted" refers to assemblies where the plenum or distribution box routes airflow horizontally through one or more side-exit duct openings, as opposed to straight-down or rear-exit configurations.
Using the wrong ceiling assembly -- even one that physically fits the roof unit -- can result in restricted airflow, poor heating and cooling performance, and premature wear on the compressor or heat strip. The 8430A635 is specifically designed for the lateral configuration and should only be used in that application.
Not all Coleman Mach ceiling assemblies are rated for heat output. "Heat-ready" components use materials and airflow geometry that tolerate the elevated outlet temperatures produced by electric heat strips (typically 90-120 deg F discharge air). If your Coleman Mach unit includes a heat pump or auxiliary heat strip, always confirm your ceiling assembly carries the heat-ready designation to avoid warping or airflow restriction over time.
The 8430A635 is designed for use with Coleman Mach 8 and Mach 15 series rooftop air conditioners configured for lateral ducted operation. Typical compatible roof units include:
Always verify your roof unit's parts diagram or the existing ceiling assembly part number before ordering. Coleman Mach part numbers are typically printed on a label inside the ceiling box or on the roof unit data plate.
Coleman Mach sells separate ceiling assemblies for ducted and non-ducted systems. Ducted assemblies connect to interior ductwork; non-ducted assemblies discharge air directly into the living space from the ceiling. These are not interchangeable. The 8430A635 is a ducted (lateral) assembly. If your current setup discharges air straight down through a grille with no duct connections, this is not the correct replacement.
This ceiling assembly is a direct replacement for existing lateral ducted installations. It does not convert a non-ducted system to a ducted one. Proper duct connections, gasket sealing at the roof unit, and secure ceiling panel mounting are required for correct operation. Coleman Mach recommends using a new ceiling-to-roof-unit gasket when replacing the ceiling assembly to prevent air leaks into the ceiling cavity.
Inspect the ceiling assembly grille and louvers each season. Dust buildup on interior louvers restricts airflow and reduces system efficiency. The grille on most ChillGrille assemblies is removable for cleaning. While the ceiling box is disassembled, check the foam gasket between the ceiling assembly and the roof unit for compression or cracking -- a failing gasket is one of the most common causes of poor cooling performance in ducted Coleman Mach systems.