A.O. Smith ProMax XL Gas Water Heater
The ProMax(r) XL Circulating Loop Heat Exchanger from A.O. Smith Water Products Co. is designed for installation with ProMax SL residential gas water heaters to provide domestic hot water plus an isolated source of hot water for radiant floor heating and other closed-loop applications. Offered in 28,000 or 52,000 Btu output models.