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The T-4000-201 Series Pneumatic Room Thermostat by Johnson Controls is designed to offer precise temperature control for heating and cooling applications across various environments. These thermostats utilize a proportional output signal, enabling them to smoothly adjust connected devices according to changes in the space’s load. This intelligent modulation minimizes the strain on mechanical heating and cooling systems, optimizing their efficiency. Experience enhanced control and improved energy management with the T-4000 Series Pneumatic Room Thermostats.