Best for
A greenhouse heating or cooling system designed for 24V thermostat control.
#10 in the buying orderHeatingSystem component
Bootstrap Farmer 24V Greenhouse Thermostat
This is a proper 24V climate-system thermostat, not a universal plug-in controller for any heater or fan.
- Current price
- $115.99
- Checked September 1, 2026
- Review type
- Independent desk review
- Not a physical product test
Skip if
You are trying to plug a normal 120V appliance directly into it. That is not what this thermostat is for.
Hidden cost
Transformer, relay or contactor, wiring, enclosure, and professional electrical work may be required.
Why it made the list
The buyer case
The seller states the control voltage and operating range clearly, which exposes the compatibility question before purchase.
Compatibility comes first
Requires a compatible 24V system and correct wiring. Confirm the controlled equipment, transformer, amperage, and installation method.
Installation boundary
Treat it as a control component in a designed system. Do not improvise mains-voltage switching through a 24V thermostat.
Our verdict
A useful component for the right system and an expensive wrong purchase for everyone else. Compatibility is the whole decision.
Primary sources
Product facts come from these direct sources. They are kept separate from the purchase button, and none is rewritten through an affiliate redirect.
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Check a current US distributor
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- Best for
- Small North American greenhouses needing frost protection on a correctly sized circuit.
- Skip if
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- Best for
- Owners of a 6x8 to 8x12 greenhouse who need frost protection or a modest overnight hold on a single GFCI-protected 120 V circuit.
- Skip if
- Your heat-loss math needs more than about 5,000 BTU per hour, you have single glass in a cold climate, or you cannot give it a GFCI-protected outlet of its own.
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$299.99 at biogreen-products.com, down from $329.99
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- Best for
- A 10x12 or 12x16 twin-wall greenhouse, or a smaller single-glass house, where the heat-loss number lands between 5,000 and 9,500 BTU per hour.
- Skip if
- You do not have, and will not install, a 240 V circuit in the greenhouse. On 120 V this heater does not exist as an option.