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it must be configured with the appropriate spring kit or conversion regulator as specified by the furnace manufacturer’s installation instructions
it is specifically sized for 2-1/8 inch outside diameter copper tubing
Utilizing a sensitive diaphragm element
allowing for significant adjustment of the drive ratio
Venstar VST3800 Thermostat R-410A it must be configured withFor service technicians requiring a reliable multi stage control solution, the Venstar VST3800 Thermostat serves as the definitive genuine OEM replacement for obsolete units including the VST1800, P374 1100, P374 1800, and T1800. This 4 Heat 2 Cool (4H 2C) thermostat is engineered to interface seamlessly with Carrier Venstar HVAC systems, supporting complex configurations such as multi stage heat pumps, gas electric dual fuel setups, and hydronic
US$ 85.00
US$ 101.50
US$ 172.00
