We are an authorized distributor for Honeywell and other leading thermostat manufacturers.

Line voltage thermostats are typically used for electric radiant, convection or resistance heaters such as baseboard, cove and wall heaters.
Low voltage thermostats are used with central heating systems including furnaces, boilers, air conditioning, heat pumps and split systems. The wires aren’t as thick as you’ll find on line-voltage stats.

If you’re replacing a thermostat you can check which one you need by looking at your wiring. Line-voltage thermostats have two or four thick wires coming out of the back that are attached with wire nuts to wires in the wall. The wires are much larger than the wires on low-voltage thermostats.

Click on a sub-category below or scroll past them to see all the products in this category. You may also use the filters on the left to sort the products in this category.

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HOME AC0056 Touchscreen Thermostat
Nuheat Programmable 120/240V Dual-Voltage Thermostat - 3.5" 320x480 pixel color Screen - 7-day programmability - Built-in Class A GFCI - Compatible with any electric floor heating system using a 10K Ohm sensor-incl.sensor-15A - Part #: AC0056

NUHEAT10296
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HW120 120V Hydronic Thermostat
King Electric 120 Volt HW (Hot Water) Series Electronic Line Voltage Hydronic System Thermostat - 2 Circuit - 12.5 Amp - LCD display with temperature - Push button temperature settings - control a circuit pump and fan on a hydronic coil heating system

KINGELECTRIC19048
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K101-C Line Voltage Cooling Thermostat
King Electric 120, 208, 240, 277 volt Resistive Load / 22 amps - For line voltage cooling applications only - Single Pole, Operates 41 - 90F - Mounts directly to a 2x4 inch vertical electrical outlet box

KINGELECTRIC20631
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K702E-2 Thermostat 41-95F 120/208/240V
King Electric Electronic Theromstat - Programmable Presets, Line Voltage - 3328/3840 Watt - 120, 208, 240 volts / 16 amps - Double Pole - 16 Amp - Simplstat - No Programming needed. 3 Personalized Presets. Oversized Buttons - Range: 41F to 95F

KINGELECTRIC10393
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KT0110 SPST Cool only Thermostat
TPI Corp. (Markel/Raywall/Fostoria) KTO Series Thermostats - SPST Cool only Thermostat - Catalog #: 05343602

MARKEL534369
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L08Y01 Thermostat with 8ft Capillary
TPI Corp. (Markel/Raywall/Fostoria) 0-90F Temperature Range Industrial Thermostat - 8 Foot Capillary Bulb - Rugged steel cage - SPDT for Heat or Cool - 25 Amp resistive - Rated differential of 6F

MARKEL534277
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M21SP Wall Thermostat 120/208/240/277V
Robertshaw Climate/Mears Non Programmable Wall Mount Line Voltage Thermostat - Deluxe Model - Single Pole-3 wire - With Heat Anticipator - 45 to 75 Degrees F - Ivory Color

MEARS10004
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M600MTP Tstat
M600MTP Tstat

QMARK98319841575
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M600S Two Circuit Ivory Thermostat
Line Voltage Wall Mount Thermostat - Simultaneous switching (double circuit) - 45F to 75F - Accuracy Within 3F of setpoint - Simultaneous control of two heating loads.

QMARK98319841582
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M601 SP Thermostat Ivory/Almond
Mears Line Voltage SPST Wall Mount Thermostat - 45F to 75F - 22 amps @ 120, 208 or 240 Volts - 18 amps @ 277 Volts - Ivory/Beige Color - Pigtail Leads UL - CSA - Single Pole

MEARS10005
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M601W Single Pole Thermostat White
Qmark/Marley SPST wall mount thermostat, 45°F to 75°F, 22 amp 120V

QMARK98319841483
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M601W-WT SP Thermostat White
Mears Line Voltage Wall Mount Thermostat with Thermometer - Single Pole - SPST - 45F to 75F - 22 amps @ 120, 208 or 240 Volts - 18 amps @ 277 Volts - White Color - Pigtail Leads UL - CSA

MEARS10010
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M602 DP Thermostat Ivory/Almond
Mears Line Voltage DPST Wall Mount Thermostat - 45F to 75F - 22 amps @ 120, 208 or 240 Volts - 18 amps @ 277 Volts - Ivory/Beige Color - Pigtail Leads UL - CSA - Double Pole - Off Position - Double Pole

MEARS10008
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M602TPW Tstat
M602TPW Tstat

QMARK98319841520
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M602W Double Pole White Stat
Qmark/Marley/Mears/Eaton DPST wall mount thermostat, 45F to 75F, 22 amp 208/240V, 18 amp 277V

QMARK98319841513
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M602W DP White Thermostat
Mears Line Voltage DPST Wall Mount Thermostat - 45F to 75F - 22 amps @ 120, 208 or 240 Volts - 18 amps @ 277 Volts - White Color - Pigtail Leads UL - CSA - Double Pole

MEARS10009
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M602W-WT DP T-stat w/thermometer
Mears Line Voltage Wall Mount Thermostat - Double Pole - With Thermometer - Off Position - White

MEARS10012
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R8222D1014 24 Volt DPDT Relay
Honeywell 24 Volt General Purpose Relay with quick-connect coil terminals - DPDT switching. General purpose switching Relay With 24 Volt AC Coil

HNYWLTST10027
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R8229A1005/U 24 Volt Relay
Honeywell 24 V Electric Heater Relay w/ DPST Switching - Normally Closed Relays And Contactors For Load Control Systems - Operate directly from a pilot duty rated relay in the load control system.

HNYWLTST10037
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R8229A1021/U 24 Volt Relay
Honeywell 24 V Electric Heater Relay w/ DPST Switching - Normally Closed Relays And Contactors For Load Control Systems - Operate directly from a pilot duty rated relay in the load control system - Includes extra mounting hardware

HNYWLTST10038
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R841C1151 Stelpro STELPRO R841 Series
Stelpro Low Voltage Electromechanical Relay (R841). Can be installed in an external junction box and may or may not be installed in the junction box of the heating unit - W/Transformer 600/24 Volts

STELPRO085267128667
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R841C1169 Relay for 2-wire 24 Volt Tstat
Honeywell 208/240V Electric Heater Relay W. SPST Switching - Use with two-wire, 24 Vac thermostat to control electric heating equipment such as baseboard, ceiling cable and duct heaters - switches up to a 5,000 W load.

HNYWLTST10036
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R841C1227 Relay for 2-wire 24 Volt Tstat
Honeywell 24 V Electric Heater Relay switches up to a 5,000 Watt load with SPST switching. Use with two-wire, 24 Vac thermostat to control electric heating equipment such as baseboard, ceiling cable and duct heaters

HNYWLTST10023
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R841D1036 Mech. Relay No Transformer 24V
Stelpro Low Voltage Electromechanical Relay (R841). Can be installed in an external junction box and may or may not be installed in the junction box of the heating unit - No Transformer 24 Volts

STELPRO626296188101
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RC840/U Electromechanical Relay
Honeywell (Aube Technologies) Electric Heating relay without transformer. Instant activation. Compatible with 2-and 3-wire 24V thermostats. For 120 / 208 / 240 / 277 / 347 Volt applications

AUBE10043
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RC840T-240 Electromechanical Relay
Honeywell (Aube Technologies) 5280W 240V 22A or 4575 W @ 208 V 22A Resistive. Electromechanical relay with 24 V- 208/240 V transformer. Compatible with 2- and 3-wire thermostat, this all-in-one relay includes a built-in 24 V transformer

AUBE10023
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RC840T-277 Electromechanical Relay
Honeywell International (Aube Technologies) 5260 W @ 277 V, 19 A. Electromechanical relay with transformer

AUBE10057
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RC840T-347 Electromechanical Relay
Honeywell International (Aube Technologies) Electromechanical relay with transformer

AUBE10080
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RE153 Triac Electric Rel. 120-347V 15A
Stelpro Triac Low Voltage Smaller Sized Electronic Relay 120 - 347 Volts - 15A

STELPRO626296105917
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RE153T Stelpro RE153 Series
Stelpro Triac Low Voltage Smaller Sized Electronic Relay W/Trans 208 - 347 Volts - 15A

STELPRO626296105931

Line & Low Voltage Thermostats, Relays & Transformers, Industrial/Commercial Space Thermostats, Plug In Inline Thermostats, Thermostat Wire