Swamp Cooler Duct Through Roof Detail

A typical down draft swamp cooler.

Swamp cooler duct through roof detail.

Diameter hole to be cut into the roof while not cutting through any roof joists. 2 buy a unit that can create 20 to 40 air changes per hour. You will also need a sheet metal can fabricated the same size as your ceiling diffuser opening and another round collar tied into the end cap. Keep the duct centered between the roof joists.

This swamp cooler installation will require a section of rigid ducting down through the roof with an end cap and a round sheet metal collar the same size as the flex duct. The included flex duct length is 7 feet. Use an electric drill and drill bit to drill starter holes at the corners of the marked outline then use a saw to cut the outline. Install several wooden blocks below the section of duct to.

Roof mounted are the most common although they are more difficult to maintain. Mounted coolers are connected to ducts that bring the cooled air into the rooms of your home. This may require access into the attic. A typical side draft cooler.

Fit the collar into the port on the side of the cooler with the section of duct extending horizontally above the duct riser at the roof. The collar or apron can be used as an 18 inch template. Drill a pilot hole through the roof and use a saber jig saw or equivalent tool to cut the 18 inch diameter hole. Also this version is easier to perform maintenance on.

Use the cooler duct and a pencil or marking pen to mark the shape of the duct on the inside of the roof.