Prewired Line Voltage Thermostat | 30°F-110°F

(10 customer reviews)


  • 8 foot cord
  • UL listed
  • SPDT
  • Can handle 5 full load amps @ 120V
  • 30°F to 110°F temp. range with ±2° accuracy, 3° differential
  • Weatherproof NEMA 4X Enclosure
  • Made in USA


Our prewired line voltage thermostat is great for direct control of heaters, fans, air conditioners and more. Great for both heating and cooling applications commonly found in greenhouses and other agricultural settings where NEMA 4X is preferred.

They are as simple as plugging the thermostat into a standard wall socket (110/120 volt outlet). Then, plug any 110/120 volt appliance (heating or cooling) into the outlet on the plug of the thermostat. Set your desired temperature to turn the appliance on!

These thermostat controllers are commonly found in barns, greenhouses, garages, vacation homes, construction sites, RV’s, basements, computer rooms and more. They aren’t effected by surges, lightning strikes or power outages like a digital thermostat. It can be used anywhere you have a 120 volt outlet as the clear cover protects from weather and damage.

This portable thermostat will handle almost any 120 volt heater with no problem or an 8-10,000 BTU air conditioner. Check your appliances ratings first!

Capillary controlled component gives accurate ± 2° accuracy.

Additional information

Weight 32 oz
Dimensions 9 × 7 × 6 in

10 reviews for Prewired Line Voltage Thermostat | 30°F-110°F

  1. Mark (verified owner)

    Product works great and is reliable. Have used these thermostats in my greenhouse for several years. Staff are very helpful and service is fast.

  2. Anonymous (verified owner)

  3. Joseph Nunes (verified owner)

    Shipped quickly and works as expected

  4. Maitreya Z. (verified owner)

    Thermostats arrived packaged well and in a timely manner. I didn’t get right away that they could be set to both heat and cool. They were set to heat so after I read a little more in the directions I changed them to cool and they work fantastic. Very happy with this purchase.

  5. Mo (verified owner)

    Great way to control a small ceramic space heater. Use it in my utility room as a backup so room does not freeze if main heat fails. I have K-Control set so that heater kicks on if room temp drops below 40f, have been using them for ten plus years

  6. John Dieman

    I’ve had two of these devices for decades. When I was in the carpet cleaning business I kept one in my truck attached to a 1500 watt resistance heater to keep my equipment from freezing during the winter. It never failed. I now keep one in my home water treatment shed during the winter attached to a 200 watt neater. I’m buying one more so that I can use two, attached to 1500 watt heaters as backup for my home heating system during the winter whenever we’re away on vacation.

  7. countrytool jim suhr (verified owner)


  8. Jeffrey Hoover (verified owner)

    calibration is off. set at 30, but kicks on just above 40, can’t set it any lower

  9. Michael Callaghan (verified owner)

    great product!

  10. Bob S. (verified owner)

    I thought it was pre-wired for cooling, it was wired for heating, had to switch the wires. Works well.

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