A. O. Smith ATO-310U-N Outdoor Natural Gas Ultral-Low NOx Non-Condensing Tankless Water Heater
190,000 BTU tankless gas water heater for homes with up to three bathrooms.
The 310 Series is A. O. Smith's most popular and versatile tankless model . It features a maximum flow rate of 8 GPM, providing enough hot water for three showers in warm climates, or up to two showers in colder climates at the same time.
• 190,000 BTUs