Caleffi ZSR104 4 Zone Expandable Switching Relay with Priority voomi_id_3501 The Lennox 17L63 Heat Exchanger

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

Construction: Durable materials suited for continuous use

Manufacturer: SnapOn

simplifying maintenance and extending the valve's lifespan

Its robust construction makes it suitable for both residential and commercial applications

Caleffi ZSR104 4 Zone Expandable Switching Relay with Priority voomi_id_3501 The Lennox 17L63 Heat ExchangerProduct 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