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The Johnson Controls T-4002-9009 is a high-performance pneumatic thermostat designed for precise temperature regulation in a range of environments, particularly suited for commercial and industrial applications. This thermostat operates efficiently with a horizontal orientation making it versatile for different settings.
This thermostat offers a reverse acting control, which means it activates heating when the temperature falls beneath the threshold, ensuring a stable environment.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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