Argo Hydro-Air Zoning Controls Regulate The Function Of Multiple Thermostats And Air Handlers While Using A Single Boiler.
Argo Hydro-Air Zoning Controls feature LED diagnostic readout for long lasting reliability. Efficient design includes built-in air handler freeze protection. Zoning control has plug in connectors to easily expand systems up to 20 zones. Multiple terminals accommodate two-speed air handlers. Strap-on bi-metal aquastat prevents cold air from circulating while in heating mode. 5-year limited warranty. Zones controlled are 1, 2 or 3. Dimensions vary per model.