Low Voltage Thermostats

A low Voltage Thermostats operate on 24 volts of electrical energy using a step-down transformer that reduces the just arrived 120V heat voltage come a level between 12V and 24V. Some types of low voltage thermostats deserve to use voltages the 6 volts and also it have the right to go approximately 30 volts, yet 24 volts is the many used voltage. The benefit of this thermostats is the they use much less power (around 24 Volts) come operate.

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Using short voltage thermostats, you can manage all kinds of heaters from boilers, furnaces, radiant heat, air conditioning, warm pumps, or baseboard heaters. The only disadvantage of these thermostats is that their environment is more difficult unlike heat (high) voltage thermostats because they have much more wires come connect.

These thermostats room the most common and versatile type of thermostats uncovered in homes. If your home only has one main thermostat the is offered for both heating and air conditioning, then you have a Low Voltage mechanism installed in your home.

If you are not sure, look at the wires at the picture!


Voltage: 24V (AC)

There is a lot of popular brands of short Voltage smart thermostat prefer Nest, Ecobee, and also Honeywell i m sorry you’ve most likely heard of before. Short voltage thermostats encompass bimetallic mercury, digital/programmable thermostats, and mechanical contact types.

Low Voltage Thermostats

Thin Wires required2-3 Wires are necessary without cooling4-5 Wires are required with cooling7+ Wires with warm pumps systemsStep under transformer is required


Conventional forced-air gas furnaces, consisting of standing pilot furnaces and eclectic furnaces.Electric required air heatingSingle-phase or multi-phase heat pumps Gas, oil and electric boilers because that radiant heaters or hot water baseboard heatersElectric central air conditioners

What is short Voltage Wiring?

The circuits and also equipment v 50 volts or less are thought about low voltage, and also wiring the is designed to operate and carry less than 50V is thought about low voltage wiring. Most tools or appliances run at a low voltage in between 12V-24V. Step down transformer is forced when we want to usage low voltage equipment. Because of that, the initial price is greater and installation deserve to sometimes be an ext difficult.


The benefits of short voltage wiring are that you have the right to utilize for a most applications such together telephones, Wi-fi networks, and cables. The use of cables in the commercial framework is needed an ext than ever.

Line (High) Voltage Thermostats

A line Voltage Thermostats space supplied directly from a typical 120V or 240V circuit and are greatly used because that electric room heaters, where we encompass a baseboard heater, direct-wired electric furnace, and also other heaters in general.

The line Voltage thermostats convert the electric present from the home (120V or 240V) into heat. They are powered and operate at 120V-240V on average. Most line voltage thermostats typically have solitary pole wiring or dual pole wiring which depends on functions that heater and thermostat have:

Single Pole Thermostat

Single CurrentTwo Wires room connecting the main circuitMust disconnect unit to revolve off

Double Pole Thermostat

Operates on separate CurrentsFour wires room connecting the key circuitCan be conveniently turned off at thermostat

Although we said that most Americans usage Low Voltage heater systems, over there is a mix of heater systems, so we can likewise find heat (high) Voltage solution in millions of homes roughly the world. If you have actually forced-fan heaters or baseboard heaters in your house, climate you will absolutely need a heat Voltage thermostat.

These thermostats room not as sensitive and precise as most low voltage thermostats, and it may take a temperature change of approximately 7 degrees Fahrenheit to do them react. Therefore, greater energy usage is come be expected in any type of heating system regulated by these thermostats.

For heat Voltage thermostats, the wires will be associated like this:


Line Voltage thermostats have between 2 come 4 special wires together it is presented in the picture.

One means to call if you have a line thermostat is come look at the wires. The key wires will certainly be quite thick, 1.5 come 2 mm, choose those plugged into a wall outlet or light switch. On the other hand, the wires of short voltage thermostats are very thin, favor those the doorbells or telephone jacks.

Voltage: 120V or 240V (AC)


Electric baseboard heatersLocalized furnaces (with line thermostat in each room)Oil fired boiler for radiant heaters or hot water baseboards

What is a line Voltage Wiring?

When us talk about Line (High) Voltage wiring, it typically refers to the quantity of volts the circuit has. The voltage the 120V that is walk thru the wire, is taken into consideration as line voltage wiring.


The line voltage has actually the traditional voltage that 120 volts that you can discover in outlets and also junction box in the Canada and United States. Most home items room designed to be used and plugged directly into a socket, therefore they are ready to usage the power straight from the outlet.

The pros of heat Voltage Wiring

Very affordable price and also fixturesVery easy to install and also useLine Voltage wiring doesn’t call for voltage conversionVery huge variety of commodities on market

Which Thermostat execute I Need?


You have the right to choose in between furnaces and heaters. But prior to you decide to choose a thermostat, you need to check what circuit line you have at home. If you have actually a difficulty to recognize what type of line you have, it is finest to asking a certified technician to execute this for you.

NOTE: You need to inspect what type of circuit you have actually at home prior to you take into consideration the kind of thermostat girlfriend need. Short voltage thermostats can’t work-related if you have line voltage wiring.

Here you have the Ultimate guide to smart Thermostats.

How To know If mine Thermostat is 120V or 240V?

To understand at what voltage your thermostat is working, you need to turn turn off the power and also check the wiring. One means is to look right into the gang crate on your existing thermostat. If you have white and also black wires, climate it is probably 120V. If there space red and black wires, then it is more than likely 240V. High voltages are dangerous and also can be fatal.

Final Thoughts

Now that us have described the difference between a line voltage and a low voltage heater system, i hope you have a much better understanding of exactly how it all works and also the services of these 2 systems. Heat (high) voltage operates top top 120 volts and can be uncovered in our house outlets, when a low voltage system commonly operates on 12 or 24 volts and it needs a little transformer to reduced the 120 volts also low voltage.

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According come statistics, 30% of Canadian households and also 10% that American households are making use of Line (high) Voltage heater systems. Back they space not together economical as low voltage, most human being rely on electrical power to warm their homes. If you have extr questions, do not hesitate to call us.