Keep your ducted Coleman Mach air conditioner delivering properly conditioned air to every vent. This OEM-spec fabric collar package replaces worn, torn, or missing duct collars on Coleman Mach rooftop AC units that were originally installed with the duct fabric kit -- restoring the sealed airflow path between the unit and your RV's ceiling duct system.
In a ducted RV air conditioning setup, the fabric collar is the critical interface between the rooftop Coleman Mach unit and the ceiling plenum or distribution duct. Over time -- through UV exposure, vibration, repeated seasonal removal, or simple age -- these collars crack, tear, or lose their seal. The result is conditioned air leaking into the ceiling cavity instead of reaching your living space, forcing the compressor to work harder and your comfort to drop.
Part number 9330A4541 is the Coleman Mach factory-spec replacement collar package, engineered to match the geometry and attachment points of the original duct fabric kit installation. Replacing a degraded collar is one of the fastest ways to recover lost cooling efficiency without touching the compressor or refrigerant circuit.
Designed to match original Coleman Mach duct fabric kit geometry -- no trimming or modification needed for compatible units.
Restores the airtight collar connection between rooftop unit and ceiling duct, stopping conditioned air from escaping into the roof cavity.
Includes the collar components needed for a complete swap -- no sourcing individual pieces separately.
A properly sealed duct collar reduces compressor runtime and thermal stress, helping the whole AC system last longer.
Coleman Mach rooftop AC units can be installed in two configurations: non-ducted (air blows directly into the coach through a ceiling assembly) or ducted (conditioned air is routed through a ceiling plenum and distribution ducts to multiple vents). The ducted configuration requires a fabric collar -- a flexible, shaped connector that forms the airtight transition between the unit's air outlet and the duct opening in the ceiling.
Because the collar is flexible fabric rather than rigid sheet metal, it accommodates minor alignment variation and absorbs vibration. But that same flexibility makes it the most wear-prone part of the duct assembly. Inspecting and replacing the collar at the first sign of cracking, delamination, or separation is far less costly than diagnosing a "weak AC" complaint that's actually a duct leak.
When installing the replacement collar, clean the mating surfaces on both the AC unit and the ceiling duct opening before securing the collar. Any debris or old adhesive residue under the collar edge creates a bypass leak that undermines the seal. Inspect the surrounding ceiling duct material for cracks while the collar is off -- this is the best access opportunity you will have.
This collar package is specifically for Coleman Mach units installed in a ducted configuration using the OEM duct fabric kit. Non-ducted installations use a different ceiling assembly and do not use this collar. If you are unsure which configuration your unit uses, check whether conditioned air exits through a single ceiling grille directly below the rooftop unit (non-ducted) or through multiple vents distributed around the coach (ducted).
This part is designed for Coleman Mach units that used the duct fabric kit in the original installation. Not all Coleman Mach rooftop units are configured for ducted distribution. Verify your unit's model number and original installation type before ordering. Cross-reference with your RV's build documentation or the existing collar's part number if visible.