Caleffi ZSR104 4 Zone Expandable Switching Relay with Priority voomi_id_3501 making it suitable for various

making it suitable for various applications requiring efficient fluid control

The Lennox 17L63 Heat Exchanger is designed to enhance efficiency in heating and cooling systems by facilitating optimal heat transfer

Control Type: Coiled Bulb

Designed for reliability across a broad range of operational conditions

Valve Size: 6 inches [150]

Caleffi ZSR104 4 Zone Expandable Switching Relay with Priority voomi_id_3501 making it suitable for variousProduct Description The Caleffi ZSR104 is an expandable switching relay designed to control up to four hydronic heating zones with additional priority zoning capabilities. This module is ideal for simplified zoning applications where multiple zones require individual control. Integrates with low voltage thermostats or controllers. Features high capacity transformer options and multiple zone control. Fully equipped with LED indicators for system