Johnson Controls W43A-14C Humidistat

The Johnson Controls W43A-14C Humidistat is a precise humidity control device designed for reliable climate management. The W43A-14C Humidistat uses SPDT action to throttle humidity from 0 to 70% RH, delivering steady performance in HVAC and environmental control applications.

Designed for durability, this unit supports 120/208/240 VAC and carries UL and CSA listings for compliant operation. It measures a compact 2.96 in W x 2.94 in D x 4.71 in H and offers vertical or horizontal mounting for flexible installation.

• SPDT snap-acting switch in a dust-protected enclosure
• Throttling range: 0–70% RH for precise humidity control
• Voltage rating: 120/208/240 VAC for versatile wiring
• Sensing element: human hair for sensitive humidity detection
• Beige thermoplastic cover over a 0.05 in cold rolled steel base

Whether used in commercial HVAC or environmental equipment, the W43A-14C Humidistat provides reliable, low-maintenance humidity control with durable construction and versatile mounting options.