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

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.

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  1. HP30 2 Circuit 120/208/240V Thermostat
    King Electric 2 Circuit Programmable Electronic Line Voltage Wall Thermostat -16 Amps per Pole - 40-93 Deg F. Temp. Set Point Range - 5+1+1 Day Programmable - White with Gray Print - Maximum Watts: 7700@240V, 6656@208V, 3840@120V - AA Battery Powered

    KINGELECTRIC19068

    $153.84

    Stock: 4

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  2. 1F80-361 Low Voltage Thermostat
    White-Rodgers 80 Series Single Stage Thermostat - 5+1+1 Day Programmable - For 24 VAC or Millivolt Systems - Hardwired or Battery Powered - Large LCD with backlight - Permanent program retention during power loss - Terminals: RC, RH, C, W, Y, G, O, B

    WR10051

    $49.95

    Stock: 0

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  3. 2A37-1 White Rodgers Thermostat
    Commercial Room Heavy Duty Space T-Stat (Heating and Cooling) - 20 to 90°F Range , 100V -120V/ 25amps, 240V/22amps, 277V/18amps Line Voltage SPST - Open On Rise Thermostat - Coiled Bulb - Adjustable Differential,

    WR10006

    $85.15

    Stock: 2

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  4. 230-22 20-120F SPST Thermostat 8ft Cap
    White Rodgers Heating Thermostat - 20 to 120 Deg. F Range - SPST Switch - 120VAC 25Amp and 240VAC 22 Amp Resistive Load Rating - 8Ft Capillary With A 3/8 Inch Dia x 6.25 Inch Long Bulb - Grey Color - 5.75 Inch High x 2.31 Inch Wide x 2.56 Inch Deep

    WR10004

    $134.04

    Stock: 1

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  5. 1A66-641 WR-66 DPST Thermostat
    White-Rodgers 1A66-641 DPST Thermostat, 40F to 85F, 22 amp 208/240V, 18 amp 277V, Double Pole (D.P.S.T.), wall mount

    WR10002

    $31.29

    Stock: 13

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  6. 1A65-641 WR-65 SPST Thermostat
    1A65-641 SPST Thermostat, 40°F to 85°F, 22 amp 120V, Single Pole, wall mount

    WR10001

    $27.15

    Stock: 13

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  7. STE252NPWB+ Thermostat 240V
    Stelpro STE252NP+ Series 2500W Single Programming Electronic Thermostat - Convectors, electric baseboards & forced-air units - 120/208/240 Volts - 2-wire connection - Backlighted 2500 Watts/240 Volts - (White) 37-86 deg F range

    STELPRO626296267004

    $33.60

    Stock: 13

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  8. SWT2F Thermostat DP 120-277V 22A
    Stelpro SWT Series Line Voltage Mechanical Wall Thermostat - 4-wire connection. 50 to 90 °F - 22 Amps - Electric baseboards or wall fan heaters - Double Pole - Fahrenheit - 120 - 277 Volts - 22A

    STELPRO626296219621

    $16.80

    Stock: 2

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  9. ET120 Stelpro Thermostat
    Stelpro 0-10V Output Electronic Thermostat (ET120). LCD digital screen. 24 Vac 50/50 Hz, "heat", °C , white - Lcd - 0 - 10V Output - 24 Voltsac - "Heat" - °C - White

    STELPRO626296197530

    $103.25

    Stock: 2

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  10. STE302R2W+ Thermostat Relay 3kW/240V
    Stelpro STE302R2+ Series single programming double-pole electronic thermostat. Control electric heating units with or without fans. 150 to 1500 W @ 120 V / 260 to 2600 W @ 208 V / 300 to 3000 W @ 240 V - Relay Backlighted 3000 Watts/240 Volts - (White)

    STELPRO626296187708

    $56.35

    Stock: 4

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  11. STE402PW24 Thermostat 4kW/240V
    Stelpro STE402P+ Series 4000 Watt Multiple Programming Electronic Thermostat - 120/208/240 Volts - 2-wire connection - Compatible with forced-air units - 4000 Watts/240 Volts - (White)

    STELPRO626296179345

    $50.40

    Stock: 0

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  12. EC-TS Electronic 30F to 110F Thermostat
    Raychem (nVent) P000001115 Pipe, Slab or Ambient Sensing Electronic Thermostat with 25 ft thermistor for pipe freeze protection, floor heating & snow melting - NEMA 4X - Wall mounted - 100–277 Vac - Part #: P000001115

    RAYCHEM10151

    $283.41

    Stock: 5

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  13. M601TPW Tamper Resistant Thermostat
    Qmark/Marley Line Voltage Thermostat - 22 Amps at 120/208/240 Volts & 18 Amps at 277 Volts - 1-Pole, White - Snap action - Differential 4 Degrees - 45 to 75 deg F -

    QMARK98319841490

    $37.87

    Stock: 5

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  14. WR661 Tstat Ctls Line Voltage Tstat
    Qmark/Marley Electric Heating Products WR661 Tstat Ctls Line Voltage Tstat

    QMARK98319408518

    $60.09

    Stock: 0

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  15. WR651 Tstat Ctls Line Voltage Tstat
    Qmark/Marley Electric Heating Products WR651 Tstat Ctls Line Voltage Tstat

    QMARK98319408501

    $64.09

    Stock: 0

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  16. 801-22 M601WT SP Thermostat Ivory
    Robertshaw Climate/Mears Line Voltage Wall Mount Thermostat - Single Pole - With Thermometer - Ivory/Beige

    MEARS10019

    $15.64

    Stock: 6

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  17. M600SW Two Circuit White Thermostat
    Robertshaw Climate/Mears Line Voltage Wall Mount Thermostat - Two Circuit - Each Switch 22 AMPS - Simultaneous switching control of two heating loads (double circuit) - 45F to 75F - Accuracy Within 3F of setpoint

    MEARS10018

    $28.00

    Stock: 11

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  18. M602-25 DP Thermostat Ivory
    Robertshaw Climate/Mears Line Voltage DPST wall mount thermostat, 45°F to 75°F, 25 amp 208/240V. Heavy Duty - Off Position - 25 AMP Switches (2 Switches, Each switch is 25 AMPS) Ivory/Beige - Double Pole

    MEARS10015

    $57.92

    Stock: 4

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

    MEARS10013

    $28.00

    Stock: 8

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  20. M21SP Wall Thermostat
    Robertshaw Climate/Mears Line Voltage Wall Mount Thermostat - Deluxe Model - Single Pole-3 wire - With Heat Anticapator

    MEARS10004

    $28.77

    Stock: 29

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  21. M600M Line Voltage 2 Stage Thermostat
    Robertshaw Climate/Mears Line Voltage Wall Mount Thermostat - Two stage - Each Switch 22 Amps - Ivory/Beige

    MEARS10003

    $28.00

    Stock: 3

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  22. M21DP Wall Thermostat
    Robertshaw Climate/Mears Line Voltage Wall Mount Thermostat - Deluxe Model - Double Pole - With Built in Anticipator

    MEARS10002

    $37.85

    Stock: 17

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  23. TG1 Plastic Stat Guard
    TPI Corp. (Markel/Raywall/Fostoria) TG Series Thermostat Guard - Plastic Stat Guard/ 6.25 Inch x 3.625 Inch x 3.25 Inch Opening - Catalog #: 05891202

    MARKEL589123

    $22.55

    Stock: 0

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  24. EPETD8S SPDT Explosion Proof Thermostat
    TPI Corp. (Markel/Raywall/Fostoria) Hazardous Location Thermostat - Single Phase, Bi-Metal, 22 Amps, 120-277V Supply Voltage, 50-90F - Class Group I C & D - Catalog #: 05381002

    MARKEL538107

    $229.35

    Stock: 2

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  25. EPETD8D DPDT Ex Proof Thermostat
    TPI Corp. (Markel/Raywall/Fostoria) Explosion Proof Thermostat - 50-90F, 22 amp 125-277 vac, Class Group I C & D - Catalog #: 05380702

    MARKEL538077

    $229.35

    Stock: 4

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  26. KTO121 120V Cooling Thermostat
    TPI Corp. (Markel/Raywall/Fostoria) Bi-Metal Thermostat -10-110F - 6 Foot cord and plug - SPST Cool Only - Catalog #: 05342102

    MARKEL534215

    $34.10

    Stock: 16

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  27. KTD110 Thermostat 22 Amp -10-100F
    TPI Corp. (Markel/Raywall/Fostoria) -10 to 100degF Range - Wire leads - SPDT - 6 Inch Leads - Temperature Scale: Cooler to Warmer - Catalog #: 05341702

    MARKEL534178

    $30.80

    Stock: 4

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  28. KT110 SPST 125-250V Thermostat Heat Only
    TPI Corp. (Markel/Raywall/Fostoria) Bi-Metal Industrial Series - Rugged steel case - 6 Inch Leads, Bi-Metal T-stat, UPC# 534086 - Range: -10-110F - Wire Leads - C&F - Hardwired model rated for 22A resistive @125-250 VAC - Catalog #: 05340802

    MARKEL534086

    $30.80

    Stock: 7

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  29. CKTD110 Thermostat PCN:534048
    TPI Corp. (Markel/Raywall/Fostoria) Columbus Electric SPDT Bulb and Capillary Thermostat - 22 Amp - 2 Degree Diff. - 40-110 Degrees F - Heat/Cool - Catalog #: 05340402

    MARKEL534048

    $72.60

    Stock: 1

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  30. EPETP8D DPDT Ex Proof Stat
    TPI Corp. (Markel/Raywall/Fostoria) EPET Series Hazardous Location - Catalog #: 05280702

    MARKEL528078

    $229.35

    Stock: 1

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