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AO Smith®
AO Smith® 100123378 ATI-540H Tankless Water Heater, Natural Gas Fuel, 199000 Btu/hr Heating, Indoor, Condensing, 10 gpm Flow Rate, Direct/Power Vent, 3 in, 4 in Vent, 0.95, Commercial/Residential
AO Smith®

AO Smith® 100123378 ATI-540H Tankless Water Heater, Natural Gas Fuel, 199000 Btu/hr Heating, Indoor, Condensing, 10 gpm Flow Rate, Direct/Power Vent, 3 in, 4 in Vent, 0.95, Commercial/Residential

BrandAO Smith®
MFR Part No100123378
TSCO Part Number101933

Warranty Length

  • 15 Years Limited on Heat Exchanger in Residential, 6 Years Limited on Heat Exchanger in Commercial, 5 Years on all Parts

Features

  • Ultra low NOx emissions
  • Primary heat exchanger is constructed of a commercial grade copper that is more resilient to erosion
  • Copper is 25x better at heat transfer than stainless steel thus stabilizing outgoing water temperatures quicken
  • Secondary heat exchanger is made of type 316L stainless steel to protect against corrosion
  • Air-fuel ratio (AFR) sensor, exhaust and water temperature safety control, overheat cut-off fuse
  • Exhaust, 3 in PVC venting up to 70 ft or 4 in PVC venting up to 100 ft
  • Provides flexible venting with PVC, CPVC or ABS pipe for intake and exhaust (solid core only)
  • Category III or IV venting can be used
  • Certified from sea level to 10100 ft elevation
  • Indoor model - Built-in temperature controller and advanced diagnostics to simplify troubleshooting

Standard Approvals

  • AHRI Certified
  • cCSAus Listed
  • ENERGY STAR® Qualified
  • NSF Approved
  • UPC Listed