Field Controls CAS-34U

The Field Controls CAS-34U is a versatile combustion air system designed for oil (3.5 GPH) or gas (450,000 BTU) applications. Compatible with both 120V and 24V control systems, it delivers reliable air supply for efficient combustion. The unit includes a 4-inch intake air hood and is designed to replace CAS-3 and CAS-4 for simple retrofits. This package ensures stable combustion air delivery, reduces draft-related issues, and supports safe, consistent operation across boiler configurations.

Engineered to support a range of fuel types, the CAS-34U suits oil-fired burners up to 3.5 GPH and gas-fired systems up to 450,000 BTU, ensuring dependable operation across installation scenarios. Ideal for HVAC and boiler setups where proper combustion air is critical. Its flexible control compatibility helps installers align with existing equipment without requiring adapters.

• 4-inch intake air hood included for straightforward installation.
• Replaces CAS-3 and CAS-4 models, simplifying upgrades.
• Compatible with 120V and 24V control systems for flexible wiring.
• Designed for oil (3.5 GPH) or gas (450,000 BTU) burners, ensuring broad compatibility.
• Optimizes combustion air delivery to improve efficiency and safety.