Field Controls CAS-4P Combustion Air System

Combustion Air System; Type Combustion Air System; Used On Boiler with Automatic Vent Damper; Fuel Type Gas; Appliance Input 450000 BTU/Hour; Includes 4 Inch Intake Air Hood, Fan-In-A-Can, 6 to 4 Inch Reducer Restrictor Plate ADA-1; Applicable Standard ETL (Canada and US)