Written on: February 19, 2026 by ICM
Hydrolevel Co., a manufacturer of temperature and liquid level controls for residential and commercial heating applications, is proud to highlight its HydroZone, a versatile Single Zone Switching Relay designed for HVAC technicians.
HydroZone controls circulator pumps via standard 24V room thermostats, simplifying zone control for heating systems. Equipped with an LED Zone Fault Indicator, HydroZone blinks if a zone call is not satisfied after three hours, alerting technicians to potential issues quickly. The built-in two-second delay Automatic Circulator Short Cycle Protection to help avoid short cycling of zones.
HydroZone includes a resistor, 10VA transformer and C Terminal, powering popular smart thermostats and enhancing energy efficiency. Its user-friendly 2-Option Test Button allows technicians to simulate a call for heat with a press and hold, or enter a two-minute test mode with a double tap, simplifying system diagnostics and troubleshooting.
Installation and maintenance are made easier with Industry Standard Wiring Terminals, helping ensure compatibility with existing systems; a large wiring compartment accommodating various configurations; and an extra L2 Terminal for additional connection options. Two SPDT Relays and Fuse Outputs offer versatile control options while protecting against electrical overloads. The integrated 10VA Transformer powers the Hydrolevel AcuTemp Indirect Water Heater Control, eliminating the need for a separate power source.
HydroZone represents a reliable, cost effective advancement in heating system control technology, according to the company. With features such as LED fault indication, automatic circulator protection and smart thermostat compatibility, HydroZone offers HVAC technicians a powerful tool to enhance system efficiency, simplify installation and streamline maintenance processes.
