AO Smith ATO-310U-N Outdoor Nat.Gas Ultra-Low NOx 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