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Controls

The passage of heat energy into or out of the space or substance is adjusted to achieve a desired temperature.

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Caleffi ZSR series Pump Zone Control-Single Zone Relay
Multi-zone pump and boiler operating control for multiple zone hydronic heating systems.
SKU: ZSR101
Brand: Caleffi
$82.11 each
In Stock
Requires special handling
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Caleffi ZSR series Pump Zone Control-3 zone pump control
Multi-zone pump and boiler operating control for multiple zone hydronic heating systems.
SKU: ZSR103
Brand: Caleffi
$193.42 each
In Stock
Requires special handling
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Caleffi ZSR series Pump Zone Control-4 zone pump control
Multi-zone pump and boiler operating control for multiple zone hydronic heating systems.
SKU: ZSR104
Brand: Caleffi
$226.58 each
In Stock
Requires special handling
Eligible for FREE shipping
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Caleffi ZSR series Pump Zone Control-6 zone pump control
Multi-zone pump and boiler operating control for multiple zone hydronic heating systems.
SKU: ZSR106
Brand: Caleffi
$277.11 each
In Stock
Requires special handling
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Caleffi ZVR Series Valve Zone Control-3 zone valve control
Multi-zone valve relay and boiler operating control for multiple zone hydronic heating systems.
SKU: ZVR103
Brand: Caleffi
$146.84 each
In Stock
Requires special handling
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Caleffi ZVR Series Valve Zone Control-4 zone valve control
Multi-zone valve relay and boiler operating control for multiple zone hydronic heating systems.
SKU: ZVR104
Brand: Caleffi
$174.47 each
In Stock
Requires special handling
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Caleffi ZVR Series Valve Zone Control-6 zone valve control
Multi-zone valve relay and boiler operating control for multiple zone hydronic heating systems.
SKU: ZVR106
Brand: Caleffi
$226.58 each
In Stock
Requires special handling
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Expansion transformer for ZVR
Multi-zone valve relay and boiler operating control for multiple zone hydronic heating systems.
SKU: NA10343
Brand: Caleffi
$47.53 each
In Stock
Requires special handling
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Azel 2 zone switching relay w/ priority protection, 24VAC output terminal
The i-Link series 2 zone hydronic radiant floor heating circulator pump controller is operated by low voltage thermostats or any other low voltage…
SKU: SP-82
$148.81 each
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Requires special handling
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Caleffi Twistop thermoelectric actuator 24V w/ micro switch
Twist the top to manually open and close micro-switch.
SKU: 656354
Brand: Caleffi
$90.30 each
In Stock
Requires special handling
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Viega Basic heating control
Basic heating control
SKU: 16015
Brand: Viega
$512.48 each
In Stock
Requires special handling
Eligible for FREE shipping
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Viega Powerhead
Powerhead
SKU: 15070
Brand: Viega
$52.53 each
In Stock
Requires special handling
Eligible for FREE shipping
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