State Water Heaters’ series of concentric-venting, non-condensing tankless water heaters is designed make installations simple and flexible through a gas convertible combustion system. The models come in three sizes and are designed to easily convert from natural gas to propane with all necessary components already in the box. ULN-certified and available in 140,000, 190,000 and 199,000 Btu versions, the series scores a 0.82 EF rating. These new models also come equipped with integrated controls that make temperature adjustment and diagnostic review easier. The GTS-310C-NI tankless water heater uses up to 190,000 Btu of natural gas or liquid propane to deliver a max flow rate of 8 gpm. This model meets Ultra-Low NOx emission requirements and has a 15-year limited warranty on the heat exchanger in residential applications.

State Water Heaters.