Variable Fire (VF) Circulating Water Heaters VWH

Features

• Venturi-mixing gas/air ratio system works with variable speed blower to precisely mix gas and air throughout firing range
• 4:1 turndown fully modulating capability prevents energy stealing short cycling and provides smooth system operation with higher overall system efficiencies
• Advanced electronic control changes temperature, operates the pump and provides a large amount of operational data
• Compact, low-profile design which is ideal for boiler rooms with limited access
• Factory start-up included
• 5 year limited tank warranty and 1 year limited parts warranty