50 Gal, ProLine XE Effex High-Efficiency Atmospheric Vent Water Heater (NG), 6-Yr Wrty

AO Smith

Brand: AO Smith

Mfr Part#: GAHH-50

Usually ships: within 20-24 business days
Qty Price
$1,375.95 / each & Free Shipping
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AO Smith ProLine XE, Effex series GAHH-50 model is a 50-gallon, natural gas (NG) high-efficiency fan-assisted atmospheric vent residential water heater with 6-year warranty. Energy Star qualified.


  • Energy Star qualified;
  • Category 1, fan-assisted appliance with 10ft power cord (120VAC) and pressurized combustion system deliver high energy efficiency;
  • Non-sacrificial (non-depleting) powered anode rod automatically adjusts operation to match water conditions;
  • LCD user interface;
  • Dynaclean diffuser dip tube reduces sediment build-up and improves long-term efficiency;
  • Easily replaces existing atmoshperic vent water heaters and connects to existing B-Vent.

Technical Specifications:

  • Fuel: Natural Gas (NG);
  • Nominal Capacity (Gallons): 50;
  • Rated Storage Volume (Gallons): 48;
  • Input (BTU): 40,000;
  • Uniform Energy Factor: 0.72;
  • 1st Hour Rating (Gallons): 80;
  • Recovery @ 90°F Rise (GPH): 43;
  • Anode: Powered;
  • NOx Emissions: less than 40ng/J;
  • Water Connections: 3/4" NPT;
  • Water Connections Location: Side;
  • Max Working Pressure: 150 PSI;
  • Ignition Type: Electronic;
  • Vent Type: Atmospheric (Standard);
  • Venting Size: 3" or 4";
  • Vent Material: B-Vent;
  • Max Vent Run: 180ft;
  • Elevation: 10,100 ft;
  • Power Supply: 110/120V, power cord included (10 ft);
  • LEED Rating: 1;
  • Foam thickness: 2";
  • Weight (lbs): 171.


6-Year Limited Tank Warranty / 6-Year Limited Parts Warranty
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