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 ATO-310U 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.
New, Improved Features
• Heat-resistant copper heat exchanger tubing
• Set up for natural gas from factory, but field convertible from NG to LP with included gas conversion kit
• Recess Box (for outdoor models)