The U.S. Sunlight 8914CM is a curb mount adapter for the manufacturer’s roof-mounted solar attic fans with 14-inch fan blades. The fan is purchased separately. This is not a universal adapter for every solar attic fan.
Pack contents and separate curb
The manufacturer’s instructions list one adapter and twelve screws. A treated-timber roof curb must be built separately; the adapter is not a complete prebuilt curb.
The instructions specify an outside curb size of 24 × 24 × 6 inches (609.6 × 609.6 × 152.4 mm). This is the required separately built curb, not the adapter’s overall dimensions or the fan-blade diameter.
Roof installation
The manufacturer describes flat, low-slope and tile-roof applications. A roofing professional should assess the roof, construct and flash the curb, and follow both the adapter and exact fan instructions. Matching a 14-inch blade size alone does not establish compatibility with another manufacturer’s fan.
U.S. Sunlight 8914CM installation instructions