Sign In to View Pricing & Availability
- Looking for model-specific repair or replacement parts? Enter the unit’s serial number into the A.O. Smith Parts Finder.
A.O. Smith® Tankless Water Heater, Series: ATI-140H, 120000 Btu/hr Heating, Liquid Propane, 1/2 in NPT Gas Connection, Electronic Ignition, Power Direct Vent, 3 in, 4 in Vent, Condensing/Non Condensing: Condensing, 6.6 gpm, 0.9, 3/4 in NPT Water Connection, 15 to 150 psi, Ultra Low NOx: Yes, Indoor/Outdoor: Indoor, 13-7/8 in W x 10-13/16 in D x 22-7/8 in H, Commercial
- Ultra low NOx condensing technology provides 0.93
- Copper primary heat exchanger, secondary heat exchanger is made of marine grade 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 IV stainless steel venting can also be used
- A built-in temperature controller and advanced diagnostics to simplify troubleshooting
- Complies with California SCAQMD Rule 1146.2 and other air quality management districts with similar NOx emission requirements of 14 NG/J or 20 ppm
- Approved for installation from sea level to 10100 ft elevation
- Commercial / Residential / DualCommercialEnergy Factor0.9Flow Rate6.6 gpmFuel TypeLiquid PropaneHeating Capacity120,000 BTU/hrIndoor / OutdoorIndoorUltra Low NOxYesVent Size3 in, 4 inVent TypePower DirectCondensing / Non-CondensingCondensingDimensions13-7/8 in W x 10-13/16 in D x 22-7/8 in HGas Connection1/2 in NPTIgnition TypeElectronicManufacturerA.O. SmithManufacturer #100123498Pressure Rating15 to 150 psiSeriesATI-140HWater Connection3/4 in NPT