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Ultra-low-nox-tankless-water-heater, rheem performance 40 gal. tall 6 year 38,000 btu ultra low nox (uln) natural gas tank water heater. Energystar non-condensing water heater. ultra low nox emissions (scaqmd rule 1146.2 compliant). ratings: 8.4 gpm at 40° f rise, 6.7 gpm at 50° f rise, 5.6 gpm at 60° f rise, 4.8 gpm at 70° f rise. 199.9k effective btu/h. 2% buy this, the ati-540h-n tankless water heater uses up to 199,000 btu/hr of natural gas to deliver an endless supply of hot water for a 3 bath home in northern climates and up to a 4 bath home in southern climates (one shower head per bath). utilizing condensing technology, this heater is extremely efficient with a uniform energy factor of 0.93..

The gts-240-nih tankless water heater uses up to 160,000 btu/hr of natural gas to deliver an endless supply of hot water for a 2 bath home in northern climates and up to a 3 bath home in southern climates (one shower head per bath)., the gts-540-nih tankless water heater uses up to 199,000 btu/hr of natural gas to deliver an endless supply of hot water for a 3 bath home in northern climates and up to a 4 bath home in southern climates (one shower head per bath). utilizing condensing technology, this heater is extremely efficient with a uniform energy factor of 0.93..

Takagi tk-310u-i tankless water heater 190,000 btu natural gas/propane indoor ultra low nox. the compact tk-310u-i is a fully modulating, gas fired, non-condensing tankless water heater perfect for residential applications., the westinghouse 11 gpm ultra low nox natural gas condensing high efficiency tankless water heater is constructed with a durable, high grade stainless steel heat exchanger to resist corrosion and provide a longer life expectancy.. Ati-240h-n tankless water heater condensing ultra-low nox indoor 160,000 btu natural gas 3971 3570 3565 3657 3656 3640 523523 523524 11, the westinghouse 11 gpm ultra low nox natural gas condensing high efficiency tankless water heater has a durable high grade stainless steel heat exchanger..

The ultra-low nox heavy-duty gas bcl series 200 complies with california scaqmd rule 1146.2 and other air quality management districts with similar nox emission requirements of 14 ng/j or 20 ppm.