Johnson Controls A19EAF-2C Duct Thermostat

The Johnson Controls A19EAF-2C Duct Thermostat delivers precise control for commercial HVAC duct systems. This SPDT flange-mounted duct thermostat operates with a fixed 2°F differential across a 30–110°F range, providing reliable temperature switch action for fans, dampers, and heating or cooling equipment.

Designed for rugged industrial environments, this thermostat integrates easily with standard control circuits and building automation systems. Its durable flange-mount design secures the switch in tight duct spaces, while the SPDT output supports straightforward wiring and dependable operation. Rugged enclosure resists dust, humidity, and temperature cycling, ensuring consistent performance in harsh plant environments.

• SPDT output for simple control of HVAC equipment
• Flange-mounted for secure duct installation
• Temperature range: 30–110°F
• Fixed differential: 2°F
• Durable construction for industrial environments

Ideal for air handlers, ducted fan systems, and zone control, the A19EAF-2C helps reduce overshoot and equipment wear by snapping between heating and cooling modes only when required. The compact flange profile simplifies retrofit projects, while durable construction withstands humid, dusty duct environments and long service life.