Tankless Water Heater This natural gas tankless water heater features steady temperature control and multiple safety protections, including a flame failure device, anti-freeze protection, and overheating protection. It operates with just 3.6 PSI of water pressure, delivering up to 4.21 gallons of hot water per minute. With a maximum temperature rise of 167 F, this unit is designed exclusively for use with Natural Gas LNG). Efficient & Energy-Saving With a high-performance output of 68,000 BTU per hour, this 4.21 GPM instant natural gas water heater provides on-demand hot water for 2 3 points of use simultaneously, making it ideal for bathrooms and kitchens. The advanced combustion technology minimizes gas consumption and reduces operational noise for a more efficient and quieter experience. Premium Quality & Durability Crafted with a stainless steel body for superior temperature and corrosion resistance, this natural gas water heater is built to last.