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Dual Thermostat/Humidistat Control for Power Attic Ventilators

Quick Overview


Reduce both moisture and excess heat in your attic with this Duostat to avoid mold and mildew issues, prolong the life of your roofing components, and reduce your energy costs when paired with your attic fan. This control mounts to a rafter using wood screws and has a wiring diagram provided to complete installation. As a general rule for power attic vents, your normal temperature setting will range from 95 - 115° F and humidistat setting from 60 - 70% depending on average regional temperatures and local humidity levels—a setting too low will run the fan continuously, and a setting too high will result in inadequate ventilation.

This control is compatible with our roof and gable mount power attic ventilators (excluding solar vents). Not for use with whole house fans.

  • Adjustable temperature from 60 - 120° F. Controls up to 3 units, not to exceed 10 amps.
  • Adjustable humidistat setting from 50 - 90%
  • Limited lifetime warranty
Primary Color Mill
Secondary Color Other
Unit Weight 1 lb.
Box Dimensions 8.25 in. x 5.25 in. x 3 in.
Warranty Limited Lifetime
Listings UL Listed
Associated Brands Cool Attic, Ventamatic
Single Product UPC 047242153835
Country of Origin - Assembly Not Available at this Time
Other Details 10 Amps, 120 Volts AC

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XXDUOSTAT - Dual Thermostat/Humidistat Control for Power Attic Ventilators is rated 5.0 out of 5 by 1.
Rated 5 out of 5 by from It Works Installed today for 2 attic fans. DuoStat "can control multiple Power Attic [or other brand] Ventilators (up to 3) or a single unit not to exceed 15 amps, 125 volts AC." Check the amperage draw if controlling multiple fans or your power circuit is already relatively full. Wiring is very simple: power in, power out, neutral and ground. I'm an amateur and I wired with a 3-way switch in order to have a manual override in case the wife cooks...ahem.... (Disclaimer: I ordered from a third party.)
Date published: 2019-09-05
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Are You Troubleshooting this Unit?

Check out our KnowledgeBase with helpful tips, tricks, and articles to answer any questions you may have. Access it using this link: Click Here to Visit Our KnowledgeBase

Are You Ordering a Replacement Part?

If you are ordering a replacement part and are unsure about your part number please call our Customer Service Department toll-free at 800-433-1626 to speak with our friendly customer service representatives who can assist you in purchasing the correct item.

Please note that replacement parts are only intended for use with products manufactured by Ventamatic, Ltd. Use or installation of parts outside of Ventamatic products are at the customer's discretion and may void any warranty extended on the part. Ventamatic is not responsible for issues arising from parts used or installed outside of Ventamatic products. 

Improperly ordered items are subject to a 25% restocking fee.

Are You Seeking Further Information about this Product?

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Because of our ongoing commitment to the development and manufacture of high quality products, product specifications and appearance are subject to change without notice.