Restore a clean, finished look to your Dometic Duo Therm Brisk Air rooftop air conditioner with this direct-fit replacement shroud. Built from UV-resistant high-impact polystyrene, it protects critical rooftop components from weather and road debris while the rear-vented contour keeps airflow moving the way it was designed -- helping your unit run efficiently mile after mile.
Over time, rooftop AC shrouds crack from UV exposure, take impact damage from low branches, or simply fade and look worn. The Dometic 3309518.003 is the correct factory-replacement shroud for older Duo Therm Brisk Air units that originally shipped with a two-piece cover featuring a gray lower band. It drops into the same mounting footprint and restores both the appearance and the functional airflow characteristics of the original cover.
The contoured shape reduces wind buffeting and noise at highway speeds, and the rear-vented section adds structural rigidity while directing condenser exhaust air away from the intake side -- a detail that matters for cooling efficiency on hot summer days.
Matches the original bolt pattern on compatible Brisk Air units for a straightforward swap without fabrication or drilling new holes in most installations.
High-impact polystyrene resists UV degradation, rain, and road debris -- engineered to hold up on the roof through full-season use.
The rear vent section promotes smooth condenser airflow and reduces hot air recirculation back through the coil, supporting peak cooling efficiency.
Aerodynamic contour minimizes wind drag and road noise while driving, a common complaint with cracked or ill-fitting aftermarket covers.
This shroud is intended for older-style Dometic Duo Therm Brisk Air rooftop units that use a two-piece cover with a gray lower section. The easiest way to confirm compatibility before ordering is to check the data label located under the existing shroud on the rooftop unit.
The 3309518.003 shroud is molded from high-impact polystyrene -- the same material class used in the original Dometic factory covers. It is formulated to resist UV yellowing and brittleness over years of rooftop exposure. The Polar White finish with gray lower band matches the original two-piece aesthetic.
Before starting, always disconnect power to the air conditioner at the breaker -- both 120V shore/generator power and any 12V control circuit -- before removing the old shroud or handling any rooftop components.
Two-piece shroud tip: If your existing shroud is still in the original two-piece configuration (upper section riveted to the gray lower band), you will need to separate the two pieces before installing this replacement. Drill out the rivets holding the upper and lower sections together, discard the old lower band, and install the new shroud using the existing mounting locations. The new shroud includes the gray band as part of the single-piece molding.