Available in both natural gas and propane, 199,000 BTU Model C199 produces endless supply of hot water for businesses of all sizes. Condensing tankless water heater with heat exchanger is capable of temperatures from 98–185°F without additional controller. Unit can be installed individually and comes standard on multi-unit freestanding or wall mount Tankless Rack System. Venting options, such as room air common venting and sidewall intake, both have vertical exhaust.