Takagi Tankless Water Heater, Series: 540P, 199000 Btu/hr Heating, Natural Gas, 3/4 in NPT Gas Connection, Electronic Spark Ignition, Direct Vent, 3 in and 4 in Vent, Condensing/Non condensing: Condensing, 10 gpm, Energy Factor: 0.94, 3/4 in NPT Water Connection, 4 to 10-1/2 in WC Gas/15 to 150 psi Water, 120 to 140 deg F, Ultra Low Nox: Yes, 316L Stainless Steel/Copper, Indoor/Outdoor: Indoor, 17-3/4 in W x 11-1/4 in D, Commercial/Residential/Dual: Residential
TK-540P-NIH series integrates a recirculation pump to provide instant hot water in residential applications with dedicated recirculation lines. The pump is easily controlled with a simple user interface and multiple pump settings allow you to customize pump operation to meet your needs while maximizing heater efficiency. Number of showers this unit can handle, depending on ground water temperature.