Bryan Steam indirect water heaters provide large volumes of water for various applications and range from 350,000 to 8 million Btu/hr., with atmospheric gas-fired and forced-draft gas-, oil- or dual-fuel-fired models available. Indirect water heaters require less floor space than most other types of heaters or boilers and feature the exclusive flexible water tube design. The primary water in the heater maintains a constant temperature and recirculates only within the heating vessel. The heat exchanger, placed in the primary water, absorbs heat and transfers it to the water flowing through its copper tubes.
Bryan Steam. www.bryanboilers.com