Description
Cleveland Controls AFS-271 Air Flow Switch Overview
The Cleveland Controls AFS-271 is a reliable, field-proven air flow switch engineered for HVAC and combustion applications where accurate airflow verification is critical. Designed to detect the presence or absence of airflow in ductwork, air handling units, and combustion systems, the AFS-271 provides dependable switching action to protect equipment and ensure safe, efficient operation.
Key Features
- Wide setpoint range: 0.05″ ± 0.02″ to 2″ w.c. (water column) for versatile application coverage
- Broad voltage compatibility: 120–277Vac for use across a variety of electrical systems
- Maximum pressure rating: 1/2 PSI, suitable for standard HVAC duct and air handling environments
- Compatible with air and combustion by-products that will not degrade silicone — ideal for use in furnace, boiler, and combustion air proving applications
- Silicone-safe construction ensures long-term durability in combustion flue and exhaust air streams
- Compact design for easy installation in tight mechanical spaces
Specifications
- Model: AFS-271
- Brand: Cleveland Controls
- Setpoint Range: 0.05″ ± 0.02″ to 2″ w.c.
- Voltage: 120–277Vac
- Maximum Pressure: 1/2 PSI
- Media Compatibility: Air or combustion by-products that will not degrade silicone
Applications
- Airflow proving in air handling units (AHUs) and fan coil units
- Combustion air proving for furnaces, boilers, and burner systems
- Duct pressure differential monitoring
- Fan/blower status verification in commercial and industrial HVAC systems
- Safety interlock circuits requiring airflow confirmation before burner ignition
Why Choose the Cleveland Controls AFS-271?
Cleveland Controls has been a trusted name in HVAC airflow and pressure sensing for decades. The AFS-271 delivers consistent, accurate switching performance across a broad range of differential pressures, making it a go-to solution for contractors and engineers specifying reliable airflow safety controls. Its compatibility with combustion by-products and silicone-safe materials makes it especially well-suited for high-temperature and combustion-adjacent environments.
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