Dometic FreshJet 4 Ducted Ceiling Assembly for Single Zone and Multi Zone Installations

What is the Dometic FreshJet 4 Ceiling Assembly and what does it do?

The Dometic FreshJet 4 Ducted Ceiling Assembly is the interior distribution unit that connects your FreshJet 4 rooftop air conditioner to your RV's duct system. It mounts to the ceiling inside your RV and routes conditioned air through existing ductwork for single zone and multi zone configurations. The ceiling assembly is sold separately from the rooftop unit, so confirm whether your installation requires a single zone or multi zone assembly before ordering. For the full range of FreshJet components, see our Dometic FreshJet RV Air Conditioner components collection.

Is part number 3317404.000 the correct ceiling assembly for my FreshJet 4 unit?

Part number 3317404.000 is one of the ceiling assembly variants in this collection and is specific to the Dometic FreshJet 4 ducted system. Fitment depends on your rooftop unit model number and whether your RV uses a single zone or multi zone duct layout. Check the model number printed on your existing ceiling assembly or on the rooftop unit before ordering. If you need help confirming compatibility, contact our team by text or phone at 817-984-1852.

What is the difference between single zone and multi zone ceiling assemblies?

A single zone ceiling assembly distributes air from one rooftop unit to one climate zone inside the RV, typically the main living area. A multi zone assembly is designed for larger RVs where one or more additional zones, such as a bedroom slide or rear bedroom, require separate duct feeds from the same rooftop unit. The physical connectors and internal damper configuration differ between the two. Confirm your RV's duct layout and the number of zones your FreshJet 4 system is configured to serve before selecting an assembly.

Will this ceiling assembly fit a standard 14x14 roof vent opening?

The Dometic FreshJet 4 system is designed for standard 14x14 roof openings, which is the industry-standard cutout size for RV rooftop air conditioners. The ceiling assembly mounts to the interior ceiling below that opening and connects to the ductwork within your RV. If you are replacing an existing FreshJet 4 ceiling assembly, the swap is straightforward provided the rooftop unit model has not changed. If you are replacing a different brand or an older Dometic model, verify duct connection points and ceiling cutout dimensions before ordering.

Can I use this ceiling assembly with a non-ducted RV air conditioner setup?

No. This ceiling assembly is designed specifically for ducted installations and routes air through your RV's duct system. It is not compatible with non-ducted configurations where air is delivered directly into a single room without ductwork. If your RV uses a non-ducted setup, you will need a ceiling assembly matched to that configuration. For non-ducted ceiling assembly options, see our Advent Air ACR models ceiling assembly for non-ducted installations.

Does this collection include the FreshJet 4 rooftop unit, or just the ceiling assembly?

This collection includes ceiling assembly components only. The FreshJet 4 rooftop unit is sold separately. If you are shopping for the complete FreshJet system or additional FreshJet components such as air distribution boxes or replacement parts, visit our Dometic FreshJet RV Air Conditioner components collection for the full lineup.