The Power-Fin® line of commercial water heaters and boilers has been expanded. These new models feature digital temperature control; 87% thermal efficiency ratings; expanded firing ranges from 50% to 100%; three Btu sizes, 1.5-, 1.7-, and 2-million; and more flexible venting than the original line, up to 50 ft. The digital control system includes 16 LED readouts and thermostat accuracy at ±1°F.