Taco SR504-EXP-4 4-Zone Expandable Switching Relay W/Priority

The Taco SR504-EXP-4 4-zone switching relay with priority is designed for managing multiple zones in your HVAC system. It acts like a traffic controller, directing the flow of heating or cooling to different areas based on individual needs and priorities. Each zone gets its own dedicated relay, ensuring independent operation. Imagine having separate thermostats for different rooms. This relay allows you to connect them to a single boiler or furnace, yet prioritize specific zones based on factors like occupancy or temperature. For example, the master bedroom might get priority heating in the morning, while the unused guest room stays cooler. This versatility makes the SR504-EXP-4 ideal for various HVAC systems, including hydronic radiant heating, forced air furnaces, and even geothermal heat pumps.