The Giant® 180,000 BTU natural gas instantaneous water heater features a flow rate of 7.5 gal./min, (28.4 L/min) at a 40 °F differential. This model provides an infinite source of hot water. Equipped with a scale detector, its temperature lock function prevents temperature changes. This water heater is intended for residential applications and must be installed by a professional. This product is manufactured in Canada and is covered by a 12-year limited warranty on the heat exchanger and a 5-year limited warranty on parts.