Air conditioning humidistats are essential devices used to measure and control humidity levels in HVAC systems. Humidistats are typically installed in conjunction with humidifiers or dehumidifiers to ensure precise humidity regulation. These devices monitor the moisture content in the air and send signals to the HVAC system to activate or deactivate humidification or dehumidification processes as needed. Humidistats play a crucial role in maintaining optimal indoor humidity, which is important for comfort, health, and the protection of furniture and belongings. By accurately sensing humidity levels, air conditioning humidistats help create a balanced indoor environment and prevent issues such as excessive dryness or excessive moisture. They are commonly used in residential, commercial, and industrial applications, ensuring consistent and comfortable humidity levels.

    Renowned brands like Aprilaire, Honeywell, Schneider, and Johnson Controls specialize in manufacturing high-quality air conditioning humidistats. These brands offer a variety of humidistat models designed to suit different HVAC systems and user preferences. Aprilaire, Honeywell, Schneider, and Johnson Controls prioritize accuracy, reliability, and user-friendly features in their humidistat designs. For customers in need of air conditioning humidistats, is a trusted supplier that stocks a comprehensive selection of products, including humidistats from reputable brands like Aprilaire, Honeywell, Schneider, and Johnson Controls.


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• SPST, snap-acting, dust-proof switch and are designed for wall or surface duct mounting.
• Positive ON and OFF settings.
• Twelve-inch ribbon of thin, moisture-sensitive nylon ribbon wound around three bobbins effectively gives optimum control for reliable operation under changing ambient conditions.
• Mounts in duct or on wall surface.MANUAL HUMIDISTAT CONTROL

OverviewThe H8908A Humidistat and H8908D Dehumidistat (humidity controllers) provide automatic low voltage control of humidifiers and dehumidifiers or ventilators, respectively, in central heating and air conditioning systems. They have a SPST, snap-acting, dust-
ApplicationProvides humidity control for ducts, greenhouses, computer rooms, printing and photographic laboratories, and other applications where electronic accuracy, as well as remote sensing, is desired.
Dimensions (in.)19 in. high x 11 1/4 in. wide x 9 in. deep
Voltage24 Vac
Dimensions (mm)482.6 mm H x 285.75 mm L x 228.6 mm D
MountingDuct or Remote Mount (up to 20 feet/6 meters)
Temperature Range (C)1.1C-40C
List Price98.95

Product Family

Model NumberDecriptionManufacturerPriceAvail. Qty 
H8908ASPST MANUAL HUMIDISTAT CONTROL Honeywell, Inc. Call for Pricing 0    View More Info

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