Line voltage
Line-Voltage Thermostats
Thermostats that switch electric heaters directly, with their makers' voltage, load and pole ratings side by side.
Baseboard heaters, wall heaters and electric floor heat run at 120 or 240 volts, and the thermostat switches the full heater current itself. That needs a line-voltage thermostat rated for the load: add up the heaters' watts and divide by the voltage. A 24-volt smart thermostat can't do it and can be destroyed.
EIA's 2020 survey counted 7.65 million U.S. homes heated mainly by built-in electric units. Double-pole thermostats break both live legs of a 240-volt circuit and usually have a true off position; single-pole models break one.
Line voltage can kill. Switch the breaker off and confirm it's dead before touching the wiring, and hire a licensed electrician if you're unsure.
What's on your wall now?
Wi-Fi control of baseboard heat
Smart line-voltage thermostats carry the heater load themselves and add an app and schedule.
A simple, reliable baseboard control
Basic and programmable line-voltage models for one room's heaters.
Electric floor heat
Floor-heating thermostats add a floor sensor and ground-fault protection, as the floor maker specifies.
Before you swap it
- Check the load first. Watts divided by volts must be under the thermostat's rating. Run the load checker.
line-voltage thermostat compatibility grid
| Image | Product | Type | Voltage | Max load | Poles | Heating | Wi-Fi | Price on listing |
|---|---|---|---|---|---|---|---|---|
 | Honeywell Home TH115-AF-GA/U Floor Heating Thermostat Honeywell Home | Floor heating | 120 V | 3600 | Not stated | Not stated | Wi-Fi | Check current price |
 | Mysa IN-FLOOR V1-0 Floor Heating Thermostat Mysa | Floor heating | 240 V | 3800 W | Not stated | works with 120-240V electric in-floor heating systems and includes a built-in Class A GFCI | Wi-Fi | Check current price |
 | Nuheat nVent AC0056 Floor Heating Thermostat Nuheat | Floor heating | 120 volts, 240 volts | Not stated | Not stated | Not stated | RF | Check current price |
 | Schluter DHERT102/BW Floor Heating Thermostat Schluter | Floor heating | 240 V | Not stated | Not stated | Not stated | QR Code | Check current price |
 | SunTouch 81020606 Floor Heating Thermostat SunTouch | Floor heating | 120 V | Not stated | Not stated | Not stated | Wi-Fi | Check current price |
 | Schluter DHERT104/BW Floor Heating Thermostat Schluter | Floor heating | 240 V | max load of 15 amps | Not stated | Not stated | Wi-Fi | Check current price |
 | Cadet BTF1W Line-Voltage Thermostat Cadet | Line-voltage | 240 V AC | Not stated | single pole | Not stated | Electric | Check current price |
 | Stelpro SWT1F Line-Voltage Thermostat Stelpro | Line-voltage | 240 V | Not stated | Single Pole | Not stated | Wired | Check current price |
 | Cadet T521-W Line-Voltage Thermostat Cadet | Line-voltage | 240 V | 24 W | single pole | Not stated | Wired | Check current price |
 | Honeywell Home CT410B Line-Voltage Thermostat Honeywell Home | Line-voltage | 120 V | 5263 W | Not stated | Compatible with electric baseboards, convectors and non-inductive rated fan-forced heaters | Wi-Fi | Check current price |
 | Cadet T522-W Line-Voltage Thermostat Cadet | Line-voltage | 240 V | 5280 W | double pole | Not stated | Wired | Check current price |
 | Honeywell Home T410A1013 Line-Voltage Thermostat Honeywell Home | Line-voltage | 230 V | Not stated | Not stated | Not stated | Wired | Check current price |
 | Honeywell Home RLV3120A1005 Line-Voltage Thermostat Honeywell Home | Line-voltage | 240 V | 2000 W | Not stated | Not stated | Wired | Check current price |
 | Cadet 8734 Line-Voltage Thermostat Cadet | Line-voltage | 240 V AC | Not stated | single pole | Not stated | Wired | Check current price |
 | LUX ELV4 Line-Voltage Thermostat LUX | Line-voltage | 120 V AC, 240 V AC | 2 W | Not stated | Not stated | Wired | Check current price |
 | Honeywell Home RLV3150A1004/E Line-Voltage Thermostat Honeywell Home | Line-voltage | 120 V | 3000 W | Not stated | Not stated | Wi-Fi | Check current price |
 | Fahrenheat FTA2A Line-Voltage Thermostat Fahrenheat | Line-voltage | 120 V | Not stated | Double-pole | Not stated | Not stated | Check current price |
 | Honeywell Home YRLV4300A1014 Line-Voltage Thermostat Honeywell Home | Line-voltage | 120 volts, 240 volts | 1749 W | Not stated | Not stated | Not stated | Check current price |
 | Honeywell Home RLV4305A1000/E1 Line-Voltage Thermostat Honeywell Home | Line-voltage | 240 V | 3500 W | Not stated | Not stated | Wired | Check current price |
 | Aube TH106 Line-Voltage Thermostat Aube | Line-voltage | 240 V | 2000 W | Not stated | Compatible with electric baseboard, convector and fan-forced heaters | Wi-Fi | Check current price |
 | Aube TH115-A-120S Line-Voltage Thermostat Aube | Line-voltage | 120 V | Not stated | Not stated | Not stated | Wi-Fi | Check current price |
 | King Electric ES230-R Line-Voltage Thermostat King Electric | Line-voltage | 240 V | 5280 W | Single pole | Not stated | Wired | Check current price |
 | meross MTS215 Smart Line-Voltage Thermostat meross | Smart line-voltage | 120 V | Not stated | Not stated | Not stated | Matter, Wi-Fi | Check current price |
 | meross MTS200 Smart Line-Voltage Thermostat meross | Smart line-voltage | 120 V | 1920W at 120V | Not stated | compatible with the Electric Baseboard, Convector, Fan-Forced Heater and In-Ceiling Radiant | Wi-Fi | Check current price |
 | Mysa BB V2-0-L Smart Line-Voltage Thermostat Mysa | Smart line-voltage | 240 V AC | 3800 W | single-pole | Not stated | Bluetooth, Wi-Fi | Check current price |
 | Mysa BB.2.0.01.NA Smart Line-Voltage Thermostat Mysa | Smart line-voltage | 240 V | 3800 W | Not stated | works with 120-240V electric baseboards and electric fan-forced heaters and requires one neutral or second live wire | WiFi, NFC | Check current price |
 | King Electric K902-DB-W Smart Line-Voltage Thermostat King Electric | Smart line-voltage | 240 V | Not stated | Double Pole | Not stated | Wi-Fi | Check current price |
No products match that filter.
Figures are the makers' own, quoted with their conditions on each product page. Prices change; each product page links to the current price.