Price: $44.95
Availability: In Stock - Usually ships in 1 to 2 days.

This has been replaced by the Surestat TS110 thermostat. Click here to view the updated version.

This thermostat has a weatherproof enclosure making them an excellent option for wet environments. The single stage thermostat can be used to automatically control ventilation fans or heaters. This thermostat was developed with the harsh greenhouse environment in mind. Temperature coil is stainless steel to prevent corrosion. SPDT switch. Wiring required.

SureStat Thermostat Features

  • Wide temperature range: 30° to 110° F
  • Fixed 3 degree temperature differential
  • Can be used with millivolt, 12, 24 and 120 volt appliances
  • Can handle 16 full load amps @120V
  • Weatherproof enclosure
  • Can be wired for heating or cooling

Thermostat placement in a greenhouse: To get the desired temperature, thermostats should be located at plant height near the center of the greenhouse where they are not influenced by drafts or the temperature of an exterior wall. It is best if both heating and cooling thermostats are located together and protected from direct contact with sunlight and water. One simple way to accomplish this would be to mount the thermostat(s) to a piece of wood (or other nonconductive material) with a top on it like in the picture to the left. Wood should be painted white to shade it from the sun.

What is a Differential? The difference between on and off setpoints on a control. For temperature, it is the difference in degrees between the thermostat's on and off setting. If you set a heating thermostat with a 3 degree differential to 71°, it will supply power at any temperature below 71° and cut off at 74° (3 degrees above the setpoint). A cooling thermostat would cut on above 71° and off at 68°.

Product Manuals, Tips, Specs, & Guides

SureStat Instruction Manual
Overall Customer Rating of 9 Reviews:
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New York

SureStat T110 Weatherproof Heating / Cooling Thermostat

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This was a replacement for one that went back. Easy installation and works great. Had to also order the replacement cord as the original cord also went bad.

Catawba, NC

An easy update

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Inherited an old greenhouse on a property we purchased in 2013 - never used the greenhouse until now. Had the same model thermostat but, given years of neglect/nonuse, decided to replace it with an identical model. Installation was done by our electrician but I can say it's been up and running, with excellent thermostatic control.

Decatur, AL

Greenhouse fan thermostat

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I have purchased this thermostat to replace one that no longer would work. The piece came to my house quickly and was exactly what I needed to replace the thermostat that did not work. The instructions were accurate and easily understood and the repair was made in less than a half hour.

Works perfectly

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I've just built a new greenhouse that's very heavy duty compared to my previous greenhouse and I just ordered this again to replace my old controller to start over as I already had the fan kit I ordered from ACF several years ago. This thermostat works perfectly and is very accurate.


Perfect simple weather proof Tstat

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Great design. Simple weather proof mechanical thermostat that does not require power for it to operate. Can be used with line voltage or low voltage. Three screw type with a common and one normally closed and one normally open contact so it can be used for heating or cooling. Has a good seal on the plastic hinged door to keep moisture out. Door is clear plastic so temperature setting can be viewed with door closed.