Front view of thermostat with wiring diagram instructions showing the fusible Firestat link.
The XXFIRESTAT is adjustable from 50 - 120 degrees Fahrenheit and can be modifier using a flathead screwdriver.
The back of the adjustable thermostat with pre-drilled holes for mounting to a wall or attic rafter.
Side view of firestat with pre-punched opening for wiring to your attic ventilator or exhaust fan.

Adjustable Thermostat with Firestat for Power Attic Ventilators

Regular price$27.99
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This temperature controller features a fusible link which will shut off your electric attic or exhaust fan in unsafe operating conditions exceeding 183° F, and is also used for the daily operation of your fan as a typical thermostat with a bi-metallic switch. This thermostat mounts to a rafter using wood screws and has a wiring diagram provided to complete installation. As a general rule for power attic fans, your normal temperature setting will range from 95 - 115° F depending on average regional temperatures—a setting too low will run the fan continuously, and a setting too high will result in insufficient air turns for proper ventilation.

This thermostat is compatible with Maxx Air, Cool Attic, and Ventamatic roof and gable mount power attic ventilators (excluding solar vents), as well as exhaust fans (IF14 - IF36). Not for use with whole house fans.


Mounts to attic rafter with wood screws


Adjustable temperature from 50 - 120° F. 

Energy Efficiency:

Controls the operation of your power attic ventilator, running the attic fan only when needed


Firestat safety fusible link will cut fan off at 183° F

Other Features:

References: XXADJTSTAT

Controls up to 3 units, not to exceed 10 amps

Primary Color


Secondary Color


Unit Weight

1 lb.

Box Dimensions

4.5 in. H x 4.5 in. W x 2.5 in. D

Alias SKU(s)


Single Product UPC


Other Details

10 Amps, 120 Volts AC

Sold Under

Maxx Air, Cool Attic, Ventamatic

Our products are shipped via Fedex Ground or LTL Carrier depending on the size and weight of the product. Should you have a special requirement for shipping please contact us at or call us to discuss your requirements. You can use the Freight Estimator in the Shopping Cart to determine what the freight cost will be on your item. Freight will be billed at the time of shipment. Due to the nature of the products, we cannot ship via Express or overnight service. Typically orders ship within 5 business days. Upon shipment you will be sent a notification of shipment with the Tracking Number. We reserve the right to recall a shipment for any reason.

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