Field Controls CAS-7SK Commercial Fan-in-a-Drum Combustion Air System with StarKap

The Field Controls CAS-7SK Fan-in-a-Drum combustion air system is a commercial product designed to deliver combustion air into the mechanical room, boiler room or furnace location to overcome a confined space or inadequate air supply. This dual volt unit is suitable for both oil and gas applications, with a capacity range of 840,000 to 1,800,000 BTU or 6-12 GPH for oil systems.

How It Works:

When the thermostat calls for heat, the Fan-in-a-Drum engages and begins drawing air into the structure. When air flow is established, the pressure switch closes and sends a signal to the appliance, allowing the burner to fire. The system diffuses the outside air into the room near the burner to ensure adequate air for efficient combustion.

Key Features:

• ETL Listed for safety and reliability
• Compatible with any oil or gas fired furnace, water heater, or boiler with 24 VAC or 120 VAC control systems, as well as millivolt water heaters
• Includes 10" or 12" StarKap for efficient air intake
• Integral fan-proving safety switch requires actual duct flow
• Dual voltage operation for versatile installation
• Engineered to meet NFPA 54 and NFPA 31 standards

Package Includes:

• CAS-7SK Unit (ETL Listed), StarKap, two mounting brackets, two wire/conduit connectors, one 24VAC control relay (SPDT), and one 120VAC control relay (SPDT)

Ideal for commercial applications requiring reliable combustion air delivery in confined spaces. Professional installation by a licensed contractor is recommended.