Ventamatic XXFIRESTAT 10-Amp Adjustable Programmable Thermostat with Firestat for Power Attic Ventilators, Replacement Thermostat , White

Timely shipping. 110 volt power to the thermostat and then the device is temperature controlled and can be adjusted with a Screwdriver on the thermostat. I installed it to cut on a vent fan when the attic temp ecceeded 95 degrees. I installed a switch so the power to the thermostat and ultimately the fan can be can be turned off regardless of the temperature if the building is not used.

I ordered this in Aug 2020, and it has worked well the entire time.I recommend this as it has a fire safety switch.SHUTS OFF POWER in case of FIRE.!I'm about to replace the motor, I may just install a new switch as well.

This type thermostat had been installed in a Sun City garage--vitally necessary in the excessively hot summer to cool things down when a hot engine is confined with the garage door down. I found this one which seems to be an exact replacement of the original, which had failed after 20 years or more. So I opted for this as the installation was a simple remove and replace rather than reconfigure and rewire with something digital. Installed and working fine. I would definitely recommend, but a couple puzzling comments: 1) most such devices advertise a turn-on or a turn-off temp setting. The adjustable dial shows the temp setting but no idea and none in the very brief literature about whether it is the turn-on or turn-off temp. 2) The heading calls this an "adjustable, programmable". I would remove the word programmable. It clearly is adjustable but in no way is programmable, as the term is usually applied to a digital device--and this device is wholly analog as near as I can tell. All in all, a good replacement and working fine.

The thermostat worked as expected. When the set point is exceeded my attic exhaust fan turns on. When the attic temperature is a few degrees below the set point the fan turns off. The unit I received must be “updated” since the “Fan Off Temperature” on the label has been replaced by “Temperature Setting”. The only complaint I have is that the thermostat temperature markings are inaccurate. I had to set the unit to above 115 degrees F to have it operate at 110 degrees F. Before installing I recommend connecting the two black leads to an ohm meter, then measure the thermostat case temperature. Slowly rotate the setting to find the “ON” point by rotation from full counter-clockwise toward full clockwise and then the “OFF” point in the opposite manner. That will bracket the room temperature. Half way between these readings is a good guess at the setting for the room temperature which you can use as a "correction factor" from the markings on the unit. Even so, you might also need to use trial and error if you are unsure what setting works best in your environment.

The attic fan thermostat stopped working. I switched the thermostat with this one. Works like a charm.

This product worked great.

I added this to a Vortex Replacement Vent Fan that was a major upgrade in our trailer's bathroom. https://www.amazon.com/Hengs-90043-CR-Replacement-Vortex-Fan/dp/B002N1J5IM/ref=sr_1_2?s=automotive&ie=UTF8&qid=1532359723&sr=1-2&keywords=Vortex+Replacement+Vent+FanJust wire the two black wires across the existing switch of the vent fan, and set your temperature. The vent fan will still work with the manual switch as before, except will now automatically run when the temp in the RV gets too high.That helps tremendously with reducing stress on the RV fridge. (we leave our fridge on 24/7 and use it for extra cold storage)I put the XXFIRESTAT in the closet next to the bathroom in our trailer, facing in a way so that I can get to the temp dial easily. Now, instead of running 24/7, the vent fan turns itself on when it heats up outside. Now, with the RV parked in the driveway, I have it set to 85 degrees. When we camp, I can drop it to 65 or 70 so it will turn off at night while we're in bed and it cools down, and turn itself back on as the sun comes up and it begins to get warm. All while we're still laying in bed. The factory switch allows the fan to be used when showering etc. with A/C on and too cool to be run by the XXFIRESTAT.

Easy to install and controls temperature fairly accurately. Installed on an exhaust fan.