AQ250 AQUATROL boiler controls for single temperature, residential hydronic heating systems ensure ample supply of hot water for space heating and domestic uses. Convert single zone heating systems or upgrade relay-logic zoning systems.

• Use with AQ1000 two-wire communicating thermostats, or most dry contact digital thermostats
• Offers zoning control for up to four zones and controls up to two stages of heat from a single thermostat
• Can expand up to 16 zones with AQ255 or AQ257 or up to 64 zones with AQ254 Add-A-Temp panels
• Line or low-voltage output for zoning equipment, including pumps or valves
• Features zone synchronization through the zone or Greatest Demand control
• Includes domestic hot water priority, priority override protection and boiler short cycling protection
• Automated test feature for quick start-up and simplified troublshooting