AO Smith ATO-310U-N Tankless Natural Gas Water Heater, 190,000 BTU, Power Direct Vent, 15 Yr Heat Exchanger/5 Parts Warranty

Ultra Low-Nox Non-Condensing Tankless Water Heaters

Fully modulating, gas fired, tankless water heater with sealed combustion and power vented flue. Indoor and outdoor models available for residential and commercial applications. Supplies hot water to domestic hot water systems and can be used with water storage tanks, recirculation systems, and/or combined domestic & heating applications

FEATURES

Filed Convertible From Natural Gas To Propane

Complies With SCAMQD Rule 1146.2 And Other Air Quality Management Districts With Similar Nox Emission Requirements Of 14 ng/J OR 20PPM

Maximum Flow Rates Up To 10.0GPM

Copper Heat Exchanger

• 25x better heat transfer than stainless steel thus stabilizing outgoing water temperature quicker and reducing pressure drop across the heat exchanger
Indoor And Outdoor Models Available Outdoor Models Include Remote Control As A Standard Featurre Indoor Models Include A Builtin Temperature Controller And A Factory-Installed Power Cord As Standard Features ATI-510U And ATO-510U Can Be Used In Both Residental And Commercial Applications
• Easy-Link up to 4 units (no additional parts or accessories needed)
• Multi-link up to 20 units
Complies With Lead Free Standards Safety Features
• Built-in Freeze Protection
• Manual Reset Hi Limit (Up to 194°F)
• Overheat Cutoff Fuse
• Inlet and Outlet Thermistors for Constant Temperature Monitoring
• Air Fuel Ratio Rod
• Flame Sensor
Venting And Combustion
• 4” Category III Stainless Steel
• 3” Combustion Air Intake
• 60’ Max Length, 6 Elbows max
(90° elbows = 5’ equivalent length)
• Power Vent or Power Direct Vent
• Vertical or Horizontal Installation
• Electronic Ignition - No Pilot Light
Optional Accessories
• Complete Line of Stainless Steel Venting
• Recess Box (outdoor models)
• Pipe Cover
• Isolation Valve Kit
• Backflow Preventer
• Concentric Termination Kits