Description
The Johnson Controls A28AA-81 Temperature Control is an HVAC controller which is used to control temperature in various applications. The device uses a 2-stage control output with two SPDT switches to measure the surrounding temperature ranging from -30°F to 100°F. By this control, one is ensured of accurate temperature hence recommended for use in places such as; commercial building, hospitals and industrial facilities which require sophisticated systems of air control. Because of the dual-stage feature, fine tuning of the temperatures may be done with better accuracy, enhancing comfort and efficiency in using energy.
