Make-up Air and Combustion Air Diffuser

Skuttle's popular 216 Make-up Air Control reduces unwanted air infiltration to provide added indoor comfort. Model 216-1 has a 6-in. (15.24 cm) diameter and is appropriate for most installations; Model 216-2 has a 4-in. (10.16 cm) diameter. Both models operate automatically and use no electricity.

How the Model 216 Works

An insulated flex duct connects the unit to a screened, fresh air inlet mounted outside the home. When the furnace blower operates, the air control damper opens, automatically drawing outside air into the furnace. The air is filtered, heated or cooled, then circulated through the home's duct system. As a result, a slight pressure builds up in the home, keeping untreated air from seeping in around windows and doors.