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AO Smith®
AO Smith® ProLine® Master 100274239 HWR-40 Gas Water Heater, 40000 Btu/hr Heating, 40 gallon Tank, Natural Gas Fuel, Atmospheric Vent, 42 gph at 90 deg F Rise Recovery, Tall
AO Smith®

AO Smith® ProLine® Master 100274239 HWR-40 Gas Water Heater, 40000 Btu/hr Heating, 40 gallon Tank, Natural Gas Fuel, Atmospheric Vent, 42 gph at 90 deg F Rise Recovery, Tall

BrandAO Smith®
MFR Part NoHWR-40
TSCO Part Number553537

Warranty Length

  • 8 Years Limited Tank and Parts

Features

  • Intelligent control logic - The internal microprocessor provides enhanced operating parameters and tighter differentials for precise sensing and faster heating response to optimize performance
  • Uses a thermopile to generate the power needed to operate the electronic gas control without requiring an external power source
  • The electronic gas control incorporates and LED status indicator that monitors system operation and service diagnostics
  • DynaClean™ diffuser dip tube - Reduces lime and sediment buildup and maximizes hot water output
  • Made from long-lasting PEX cross-linked polymer
  • Green Choice® gas burner - Patented eco-friendly burner design reduces NOx emissions by up to 33% and complies with Low-NOx emission requirements of less than 40 ng/J
  • Coregard™ anode rod - Our anode rods have a stainless steel core that extends the life of the anode rod allowing superior tank protection far longer than standard anode rod
  • ProLine® master products have increased anode protection with either longer or multiple anodes depending on model
  • Push button piezo igniter makes lighting the pilot fast and easy with one hand
  • Heat trap nipple - Factory installed for faster installation
  • Blue Diamond® glass coating - Provides superior corrosion resistance compared to the industry standard glass lining
  • Blue Diamond® glass coating blend is formulated in the same lab that creates the protection for our industry-leading commercial product line
  • Enhanced-flow brass drain valve - Our residential water heaters have a solid brass, tamper resistant, enhanced flow, ball type, drain valve
  • Uses a standard female hose fitting that allows for fast and easy draining during maintenance
  • Designed for easy operation, this valve includes an integral screwdriver slot that features a 1/4 turn (open/close) radius, which not only permits full straight-through water flow but also a quick and positive shut off
  • High uniform energy factor - Eco-Friendly non-CFC foam insulation, external heat traps and specially designed combustion chamber combine to produce a high UEF for maximum savings on operating costs
  • All models approved for installation from sea level to 10100 ft elevation

Standard Approvals

  • CSA Certified and ASME Specified T&P Relief Valve
  • Federal Energy Conservation Standards with Energy Policy Conservation Act (EPCA)
  • Green Choice™
  • Listed according to ANSI Z21.10.1-CSA 4.1 Standards Governing Storage Tank-Type Gas Water Heater
  • Thermal Efficiency and Standby Loss Requirements of The U.S. Department of Energy and Current Edition of ASHRAE/IES 90.1
  • UBC/CEC and HUD National Code