The Light Duty High Performance models are available in 25 and 55-gallon capacities. The 25-gallon model offers a powerful 78,000 BTU/Hr. input while the 55-gallon model offers 80,000 BTU/Hr. input. With incredible performance and unprecedented first hour delivery volumes, these High Performance models generate more than enough hot water for mop sinks, wash tubs and large wash sinks in addition to standard commercial duty.