SAS – Supply Air System
The Supply Air System (SAS) maintains a constant pressure in the mechanical room or ducted supply. Designed with EC-Flow Technology™ the SAS takes advantage of US Draft Co. proprietary bi-directional pressure transducer and PID technology to rapidly respond to varying outdoor pressures to maintain a neutral pressure in the mechanical room or appliance inlet duct when compared to atmosphere. Utilizing an inline or wall mounted supply fan, an L-series controller, pressure transducer and outdoor sensor, the system maintains the required combustion air of the manufacturer. The SAS meets all requirements for the National & International Fuel Gas Codes and the Uniform & International Mechanical Codes.