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The ATI-540H-P is a versatile propane-powered tankless water heater designed for both residential and commercial applications. With a gas input range from 13,000 to 199,000 BTU/h, this high-performance unit can deliver approximately 10 GPM at a 35°F temperature rise, 9 GPM at 45°F, and 5.5 GPM at 70°F. Its compact design, measuring 17-3/4 inches wide, 23-5/8 inches high, and 11-1/4 inches deep, makes it suitable for installations where space is limited. Weighing approximately 71 pounds, the ATI-540H-P provides an efficient on-demand hot water solution for applications requiring dependable performance, flexible installation, and continuous hot water without the need for a traditional storage tank.