Panasonic WhisperSupply Wall™ - Filtered Supply Air Solution - 20/40 CFM
WhisperSupply Wall is a through-the-wall filtered supply air solution to meet ASHRAE 62.2 requirements for make-up/supply air. Designed for use in conjunction with a furnace blower in Combustion Appliance Zone depressurization situations. Features a 20 CFM/40 CFM/Off switch. Can be used to comply with the latest codes and standards.