Performance The ondemand tankless water heater boasts a heating capacity of 80,000 BTU and a hot water flow rate of 3.6 gallons per minute GPM. It can provide continuous hot water for 23 water supply points, making it sufficient to meet the hot water needs of a households bathroom, kitchen, and bar area. No Waiting Required Unlike traditional tank water heaters, tankless water heaters eliminate the need for a 30minute preheating wait time, allowing you to have unlimited hot water on demand. Provides 4 modes Dish mode100, Fruit mode95, Elderly mode104 and Infant mode107. More convenient for you to use. Save Money The kit already includes the exhaust pipe, so you dont need to spend extra money on purchasing it separately. With an oxygenfree copper water tank, it reduces heat loss and lowers energy consumption. Applied with standard 12 NPT water fitting and gas inlet. Recommendation We strongly advise that all installations of the device adhere to local building and plumbing regulations at the installation location, and should be carried out by licensed professionals.Not recommended for areas over 2,000 feet