Cold Air Return Housing with Filter (AC01392)

The cold air return with filter is recommended to ensure the system has proper static pressure so the hot air distribution is running correctly and evenly. You may run this to an existing cold air return. The cold air return should be constructed in a way that the volume of the cold air return is equal or slightly higher than the volume of the hot air distribution. This kit will give you everything you need to allow the cold air returns to connect to the furnace. A 10" x 15" x 1" cardboard air filter is included.