SAS – Step Air System
The Step Air System (SAS) incrementally increases the supply air fan based on the number of appliances in operation. Designed with US Draft Co. proprietary control algorithm and control logic, the SAS responds to varying appliance demand scenarios to maintain adequate supply air in the mechanical room. Utilizing an inline or wall mounted supply fan and the VIC or VICx series controller, the system interlocks with fossil fuel fired heating appliances to maintain 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.
Supply air fans:
ISAB – Inline Supply Air Booster
ISAF – Inline Supply Air Fan
V300 – Constant Pressure Control
V200 – Constant Pressure Control