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Excluding HI, AK & Canada, and products marked Special Handling, Free Shipping on qualified orders over $599! *Some Items Excluded*
Excluding HI, AK & Canada, and products marked Special Handling, Free Shipping on qualified orders over $599! *Some Items Excluded*

Controls

  • Z-one Relay Three Zone Valve Control

    Caleffi
    Original price $166.58 - Original price $166.58
    Original price
    $166.58
    $166.58 - $166.58
    Current price $166.58
    In stock

    SKU ZVR103

    Interfaces with low voltage thermostats or any other low voltage controllers having a switching action. Controls from 3 to 6 zones (model dependent...

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    Original price $166.58 - Original price $166.58
    Original price
    $166.58
    $166.58 - $166.58
    Current price $166.58
  • Z-one Relay Four Zone Valve Control

    Caleffi
    Original price $197.37 - Original price $197.37
    Original price
    $197.37
    $197.37 - $197.37
    Current price $197.37
    In stock

    SKU ZVR104

    Interfaces with low voltage thermostats or any other low voltage controllers having a switching action. Controls from 3 to 6 zones (model dependent...

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    Original price $197.37 - Original price $197.37
    Original price
    $197.37
    $197.37 - $197.37
    Current price $197.37
  • Z-one Relay Six Zone Valve Control

    Caleffi North America, Inc
    Original price $256.58 - Original price $256.58
    Original price
    $256.58
    $256.58 - $256.58
    Current price $256.58
    In stock

    SKU ZVR106

    Relay (multi-zone)The ZVR series is a multi-zone valve relay and boiler operating control for multiple zone hydronic heating systems. The ZVR serie...

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    Original price $256.58 - Original price $256.58
    Original price
    $256.58
    $256.58 - $256.58
    Current price $256.58
  • 3 Zone Pump Control

    Caleffi
    Original price $219.47 - Original price $219.47
    Original price
    $219.47
    $219.47 - $219.47
    Current price $219.47
    In stock

    SKU ZSR103

    The ZSR series is multi-zone pump and boiler operating control for multiple zone hydronic heating systems. The ZSR series interfaces with low volta...

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    Original price $219.47 - Original price $219.47
    Original price
    $219.47
    $219.47 - $219.47
    Current price $219.47
  • 4 Zone Pump Control

    Caleffi
    Original price $256.58 - Original price $256.58
    Original price
    $256.58
    $256.58 - $256.58
    Current price $256.58
    In stock

    SKU ZSR104

    The ZSR series is multi-zone pump and boiler operating control for multiple zone hydronic heating systems. The ZSR series interfaces with low volta...

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    Original price $256.58 - Original price $256.58
    Original price
    $256.58
    $256.58 - $256.58
    Current price $256.58
  • 6 Zone Pump Control

    Caleffi
    Original price $314.21 - Original price $314.21
    Original price
    $314.21
    $314.21 - $314.21
    Current price $314.21
    In stock

    SKU ZSR106

    The ZSR series is multi-zone pump and boiler operating control for multiple zone hydronic heating systems. The ZSR series interfaces with low volta...

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    Original price $314.21 - Original price $314.21
    Original price
    $314.21
    $314.21 - $314.21
    Current price $314.21
  • Caleffi Single Zone Relay

    Caleffi North America, Inc
    Original price $92.37 - Original price $92.37
    Original price
    $92.37
    $92.37 - $92.37
    Current price $92.37
    In stock

    SKU ZSR101

    Single zone relayReplaceable fuses: Type 2AG, 5A slow blow.Transformer voltage: 24 VACMaximum transformer load: 12 VAElectrical switch rating: 10A...

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    Original price $92.37 - Original price $92.37
    Original price
    $92.37
    $92.37 - $92.37
    Current price $92.37
  • 24V ACTUATOR W/END SWITCH

    Oventrop, Corp
    Original price $77.51 - Original price $77.51
    Original price
    $77.51
    $77.51 - $77.51
    Current price $77.51
    Out of stock

    SKU 101 24 96

    Used for heating, ventilation and air conditioning. The actuators serve to control the room temperature and can, for instance, be used with convent...

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    Original price $77.51 - Original price $77.51
    Original price
    $77.51
    $77.51 - $77.51
    Current price $77.51
    Sold out
  • Powerhead, V: 0-10VDC

    Viega LLC
    Original price $58.81 - Original price $58.81
    Original price
    $58.81
    $58.81 - $58.81
    Current price $58.81
    In stock

    SKU 15068

      For use in Heating and Cooling applications Suitable for Manifold Model 2804, Manifold Model 2879 Model 2877.8

    Original price $58.81 - Original price $58.81
    Original price
    $58.81
    $58.81 - $58.81
    Current price $58.81
  • Viega Powerhead for Stainless Manifold, 2-Wire, 24 V - Replaces part # 15061

    Viega LLC
    Original price $60.75 - Original price $60.75
    Original price
    $60.75
    $60.75 - $60.75
    Current price $60.75
    In stock

    SKU 15070

      For use in Heating and Cooling applications Suitable for Digital thermostat Model 2874.5US, Zone control Model 2874.7US, Thermostat Model 2878....

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    Original price $60.75 - Original price $60.75
    Original price
    $60.75
    $60.75 - $60.75
    Current price $60.75
  • Powerhead, Wire: 4, V: 24 VAC

    Viega LLC
    Original price $64.53 - Original price $64.53
    Original price
    $64.53
    $64.53 - $64.53
    Current price $64.53
    In stock

    SKU 15069

      For use in Heating and Cooling applications Suitable for Digital thermostat Model 2874.5US, Zone control Model 2874.7US, Thermostat Model 2878....

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    Original price $64.53 - Original price $64.53
    Original price
    $64.53
    $64.53 - $64.53
    Current price $64.53
  • Viega Zone control, Zones: 4

    Viega LLC
    Original price $218.24 - Original price $218.24
    Original price
    $218.24
    $218.24 - $218.24
    Current price $218.24
    In stock

    SKU 18060

    For use with thermostats, powerheads, and zone valves Suitable for Zone valve Model 2837.1US, Zone valve Model 2837.2US, Zone valve Model 2837.3US...

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    Original price $218.24 - Original price $218.24
    Original price
    $218.24
    $218.24 - $218.24
    Current price $218.24
  • Viega pump & boiler relay- single zone

    Viega LLC
    Original price $89.59 - Original price $89.59
    Original price
    $89.59
    $89.59 - $89.59
    Current price $89.59
    In stock

    SKU 18033

    For circulator activation using a thermostat or end switch Components 120 VAC supply, 24 VAC transformer, control pump and boiler contact output...

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    Original price $89.59 - Original price $89.59
    Original price
    $89.59
    $89.59 - $89.59
    Current price $89.59
  • Viega Basic heating control

    Viega LLC
    Original price $596.20 - Original price $596.20
    Original price
    $596.20
    $596.20 - $596.20
    Current price $596.20
    In stock

    SKU 16015

    For controlling system water temperature based on outdoor reset Suitable for Indoor sensor Model 2871.2US Modulating mixing valve control, boiler ...

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    Original price $596.20 - Original price $596.20
    Original price
    $596.20
    $596.20 - $596.20
    Current price $596.20
  • TANK TEMP CONTROL 100-240F SPDT, 1/2" WELL

    TanklessWaterHeaters
    Original price $62.99 - Original price $62.99
    Original price
    $62.99
    $62.99 - $62.99
    Current price $62.99
    In stock

    SKU A19ABC-11

    Johnson Controls A19 Series temperature controls are designed to cover a broad range of uses for heating and general purpose requirements. Controls...

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    Original price $62.99 - Original price $62.99
    Original price
    $62.99
    $62.99 - $62.99
    Current price $62.99
  • TANK TEMP CONTROL 100-240F SPST OPN ON RISE, MAN. RESET, 1/2" WELL

    TanklessWaterHeaters
    Original price $107.28 - Original price $107.28
    Original price
    $107.28
    $107.28 - $107.28
    Current price $107.28
    In stock

    SKU A19ADB-2C

    Johnson Controls A19 Series temperature controls are designed to cover a broad range of uses for heating and general purpose requirements. Controls...

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    Original price $107.28 - Original price $107.28
    Original price
    $107.28
    $107.28 - $107.28
    Current price $107.28
  • 120V/240V NEMA 1 ELECTRONIC TEMP CONTROL - Replaces A419ABC-1C

    Supplyhouse.com
    Original price $110.08 - Original price $110.08
    Original price
    $110.08
    $110.08 - $110.08
    Current price $110.08
    In stock

    SKU A421ABC-02C

    Features: Easy to Read Front Panel LCD:Displays the sensed temperature and control function status clearly, custom icons on the display indicate t...

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    Original price $110.08 - Original price $110.08
    Original price
    $110.08
    $110.08 - $110.08
    Current price $110.08
  • JOHNSON ELEC SINGLE STAGE STAT & SENSOR - Replaces A419GBF-1

    Supplyhouse.com
    Original price $92.55 - Original price $92.55
    Original price
    $92.55
    $92.55 - $92.55
    Current price $92.55
    Out of stock

    SKU A421GBF-02C

    Features: Wide Setpoint range: -30 to 212° F (-34 to 100° C) Adjustable differential from 1 to 30° F (1 to 30° C) Adjustable anti-short cycle dela...

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    Original price $92.55 - Original price $92.55
    Original price
    $92.55
    $92.55 - $92.55
    Current price $92.55
    Sold out
  • PTC SILICON SENSOR W/PVC CABLE

    TanklessWaterHeaters
    Original price $39.50 - Original price $39.50
    Original price
    $39.50
    $39.50 - $39.50
    Current price $39.50
    In stock

    SKU A99BB-200C

    The A421 Series Electronic Temperature Controls are single-stage controls with a single-pole, double-throw (SPDT) output relay. A421 Controls featu...

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    Original price $39.50 - Original price $39.50
    Original price
    $39.50
    $39.50 - $39.50
    Current price $39.50
  • TEMP DISPLAY MODULE

    TanklessWaterHeaters
    Original price $206.77 - Original price $206.77
    Original price
    $206.77
    $206.77 - $206.77
    Current price $206.77
    In stock

    SKU D350AA-1C

    The Johnson Controls D350AA-1C Digital Display Module is used in conjunction with the A350, A350E, A350P, and A350R series temperature controls. A ...

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    Original price $206.77 - Original price $206.77
    Original price
    $206.77
    $206.77 - $206.77
    Current price $206.77
  • Mixing station Enhanced, Alpha + ProPress

    Viega LLC
    Original price $824.53 - Original price $824.53
    Original price
    $824.53
    $824.53 - $824.53
    Current price $824.53
    In stock

    SKU 12152

    Enhanced For supply temperature modulation 7 settings, permanent magnet motor design reduces power consumption by 50% Components Isolation ball...

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    Original price $824.53 - Original price $824.53
    Original price
    $824.53
    $824.53 - $824.53
    Current price $824.53
  • STAGE MODULE

    TanklessWaterHeaters
    Original price $100.25 - Original price $100.25
    Original price
    $100.25
    $100.25 - $100.25
    Current price $100.25
    In stock

    SKU S350AA-1C

    The S350 Stage Module is used in conjunction with the A350, A350E, A350P, and A350R series temperature controls to add multiple stage capability. T...

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    Original price $100.25 - Original price $100.25
    Original price
    $100.25
    $100.25 - $100.25
    Current price $100.25
  • Azel 2 zone switching relay w/ priority protection, 24VAC output terminal

    ATT Mobility
    Original price $146.55 - Original price $146.55
    Original price
    $146.55
    $146.55 - $146.55
    Current price $146.55
    In stock

    SKU SP-82

    The i-Link series 2-zone circulator pump controller is operated by low voltage thermostats or any other low voltage controllers having an SPST swit...

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    Original price $146.55 - Original price $146.55
    Original price
    $146.55
    $146.55 - $146.55
    Current price $146.55
  • 3' CABLE REMOTE MOUNTING

    TanklessWaterHeaters
    Original price $49.61 - Original price $49.61
    Original price
    $49.61
    $49.61 - $49.61
    Current price $49.61
    In stock

    SKU WHA29A-600R

    The WHA29A-600R (3 ft cable) allows the user flexibility in connecting numerous S350s remotely in a staging application and/or remote mounting of a...

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    Original price $49.61 - Original price $49.61
    Original price
    $49.61
    $49.61 - $49.61
    Current price $49.61
  • HBX Snow Socket & DUD Sensor

    AK Sales, Inc
    Original price $126.03 - Original price $126.03
    Original price
    $126.03
    $126.03 - $126.03
    Current price $126.03
    In stock

    SKU SNO-0111

    For use with SNO-0110 Optical Snow Melt Sensor

    Original price $126.03 - Original price $126.03
    Original price
    $126.03
    $126.03 - $126.03
    Current price $126.03
  • HBX Stand-Alone WiFi Snow Melt Control

    AK Sales, Inc
    Original price $541.86 - Original price $541.86
    Original price
    $541.86
    $541.86 - $541.86
    Current price $541.86
    In stock

    SKU SNO-0550

    Overview Introducing the simplest, most intuitive control available to the industry: the SN0-0550. This unique control uses a new step-by-step inte...

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    Original price $541.86 - Original price $541.86
    Original price
    $541.86
    $541.86 - $541.86
    Current price $541.86
  • HBX Remote Plastic Dipped Sensor

    AK Sales, Inc
    Original price $44.70 - Original price $44.70
    Original price
    $44.70
    $44.70 - $44.70
    Current price $44.70
    In stock

    SKU 029-0049

    A Slab Sensor is commonly used for floor temperature sensing in floor heating applications. This sensor is designed to provide a thermostat with th...

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    Original price $44.70 - Original price $44.70
    Original price
    $44.70
    $44.70 - $44.70
    Current price $44.70
  • Stand-alone/Expansion Module/Zone Control

    AK Sales, Inc
    Original price $326.70 - Original price $326.70
    Original price
    $326.70
    $326.70 - $326.70
    Current price $326.70
    In stock

    SKU ZON-0500

    Overview The ZON-0500 is an intelligent, microprocessor based zone control. Capable of controlling up to 4 zones per control, the ZON-0500 can be u...

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    Original price $326.70 - Original price $326.70
    Original price
    $326.70
    $326.70 - $326.70
    Current price $326.70
  • ThermoLinx Wi-Fi Module

    AK Sales, Inc
    Original price $243.10 - Original price $243.10
    Original price
    $243.10
    $243.10 - $243.10
    Current price $243.10
    In stock

    SKU TMX-0100

    Wi-Fi Zoning System: Used in conjunction with the ZON-0550 Zone Control, THM-0300 Thermostat, and the free HBX Zone App, the user can control their...

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    Original price $243.10 - Original price $243.10
    Original price
    $243.10
    $243.10 - $243.10
    Current price $243.10
  • Salus Universal Gateway c/w USA plug, white

    Braeburn Systems LLC
    Original price $147.26 - Original price $147.26
    Original price
    $147.26
    $147.26 - $147.26
    Current price $147.26
    In stock

    SKU SG888ZBWH

    The SALUS SG888ZB Universal Gateway is the heart of a SALUS Smart Home system that allows SALUS Smart Home devices to interact with one another and...

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    Original price $147.26 - Original price $147.26
    Original price
    $147.26
    $147.26 - $147.26
    Current price $147.26
  • FET Remote control single zone remote control

    Stiebel Eltron
    Original price $129.00 - Original price $129.00
    Original price
    $129.00
    $129.00 - $129.00
    Current price $129.00
    In stock

    SKU 234723

    Original price $129.00 - Original price $129.00
    Original price
    $129.00
    $129.00 - $129.00
    Current price $129.00
  • WPM HP controller required if HSBC is not installed

    Stiebel Eltron
    Original price $429.00 - Original price $429.00
    Original price
    $429.00
    $429.00 - $429.00
    Current price $429.00
    In stock

    SKU 205311

    Original price $429.00 - Original price $429.00
    Original price
    $429.00
    $429.00 - $429.00
    Current price $429.00
  • HBX Stand-Alone Boiler Control

    AK Sales, Inc
    Original price $611.48 - Original price $611.48
    Original price
    $611.48
    $611.48 - $611.48
    Current price $611.48
    In stock

    SKU CPU-0600

    Overview The CPU-0600 is a Wi-Fi enabled boiler control that covers a wide variety of applications from a single unit, reducing the number of diffe...

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    Original price $611.48 - Original price $611.48
    Original price
    $611.48
    $611.48 - $611.48
    Current price $611.48
  • Caleffi UL Mounting Box, all iSolar Controls

    Caleffi North America, Inc
    Original price $35.95 - Original price $35.95
    Original price
    $35.95
    $35.95 - $35.95
    Current price $35.95
    Low stock

    SKU NA10120

    Original price $35.95 - Original price $35.95
    Original price
    $35.95
    $35.95 - $35.95
    Current price $35.95