The factory-designed ceiling grille assembly for Coleman Mach 8000 and 9000 series lateral ducted rooftop air conditioners. The patented DirectFLOW Louver System lets you choose: open the louvers to blast cold air directly into the RV cabin, or close them to route airflow through your existing in-roof duct network -- all without tools or separate hardware.
Whether your RV came from the factory with a full roof-duct system or you simply need direct overhead cooling, the 8430A6321 handles both scenarios from a single ceiling assembly. The integrated DirectFLOW louvers pivot open to discharge conditioned air straight down into the living space, or pivot closed to seal off the direct-flow opening and force all airflow into the lateral duct ports -- no adapter kits, no modifications required.
This is the same Deluxe Chillgrille configuration that ships on new-production Coleman Mach lateral ducted units, so it is a true OEM-equivalent replacement. If your original grille has cracked, yellowed, warped, or has a broken louver, this assembly restores factory appearance and full functionality.
Proprietary louvers open to direct cold air into the RV or close to divert airflow into the in-roof duct system -- switchable by hand.
Designed and manufactured by Coleman Mach specifically for the 8000 and 9000 series lateral ducted rooftop AC platforms.
Upgraded cosmetic finish and louver construction compared to the standard Chillgrille; blends with modern RV interior decor.
Mounts to the existing ceiling box using the factory screw pattern -- no cutting, drilling, or adapter plates needed for like-for-like swap.
On a lateral ducted Coleman Mach system, the rooftop unit moves conditioned air out through ports on the sides of the air distribution box rather than straight down through a central plenum. This ceiling assembly interfaces with those lateral ports, letting the duct runs spread airflow to registers throughout the coach. The 8430A6321 is built with the correct lateral port geometry -- it is not interchangeable with non-ducted or centrally ducted ceiling assemblies.
Many RV owners in warm climates want to maximize cooling in the main living area without waiting for heat to work through the duct runs. Opening the DirectFLOW louvers lets the AC dump cold air directly overhead for fast pulldown, then the louvers can be closed once the cabin is comfortable to balance airflow across all duct registers. No separate zone control hardware required.
This ceiling assembly is confirmed for use with Coleman Mach lateral ducted air conditioner assemblies in the 8000 and 9000 product series. These are among the most widely installed rooftop AC brands in the North American RV market, found on coaches from manufacturers including Keystone, Coachmen, Jayco, Thor, Winnebago, and many others.
Coleman Mach produces both ducted and non-ducted ceiling assemblies, and within ducted models, both central-plenum and lateral configurations. Check the model number on the label of your rooftop unit or existing ceiling box. The 8430A6321 is specifically for lateral ducted installations in the 8000 and 9000 series. If your unit uses a centrally ducted ceiling box or a standard (non-ducted) ceiling assembly, this part will not fit correctly.
The Chillgrille ceiling assembly attaches to the underside of the air distribution box mounted at the ceiling of the RV. Replacement is typically a straightforward task:
The louver blades and grille frame can be cleaned with a damp cloth and mild soap. Avoid harsh solvents that may cloud or yellow the plastic. Inspect the louver pivot points each season -- a small drop of silicone-based lubricant keeps them operating smoothly without attracting dust.