The ATO-240HX3-N 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). Our new condensing gas tankless line features X3™ Scale Prevention Technology to last three times longer than other tankless models without X3 Technology. This heater is extremely efficient with a Uniform Energy Factor of 0.94, and complies with Ultra-Low NOx regulations.. With an industry leading 15-year limited warranty, the ATO-240HX3-N tankless water heater provides years of hot water through innovation and quality.

• Emissions: Ultra-Low NOx
• Maximum BTUs: 160,000
• Minimum BTUs: 13,000
• UEF: 0.95
• Limited Heat Exchanger Warranty: 15 Years
• Limited Parts Warranty: 5 Years
• Water Connection Location: Bottom
• Water Connection Size: 3/4"
• Heat Exchanger: Commercial Grade Copper
• Secondary Heat Exchanger: Stainless Steel
• Voltage: 120
• ENERGY STAR® Certified: Yes
• LEED Rating: 1.5
• Remote Control: Yes
• Technology: Condensing
• Type: Space Saving