ProLine® XE 50-Gallon Ultra-Low Nox Atmospheric Vent Natural Gas Water Heater

Model GUF-50
3.3 out of 5 Customer Rating
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Capacity (Gallons)
  • Delivers 83-gallon first hour rating
  • 40,000 BTU input atmospheric vent design delivers up to 0.70 Uniform Energy Factor
Product Details
  • Delivers 83-gallon first hour rating
  • 40,000 BTU input atmospheric vent design delivers up to 0.70 Uniform Energy Factor
  • Automatic flue damper design increases efficiency as it automatically opens and closes to reduce heat loss in standby mode
  • Automatic flue damper design increases efficiency as it automatically opens and closes to reduce heat loss in standby mode
  • Ultra-Low NOX Green Choice® Gas Burner, meets or exceeds emission requirements in California & Utah
  • Automatic pilot relight system shuts reduces gas consumption and eliminates nuisance pilot outages
  • Patented Blue Diamond® glass tank lining protects against corrosion
  • DynaClean™ automatic cleaning system protects against sediment build-up
  • 6-year limited tank and parts warranty

  • The ProLine® XE 50-Gallon Ultra-Low Nox Atmospheric Vent Natural Gas Water Heater offers highly optimized performance and increased efficiency thanks its automatic flue damper and electronic gas control. The automatic flue damper increases efficiency as it automatically opens and closes to reduce heat loss in the standby mode. While the intelligent control logic provides enhanced operating parameters and tighter differentials for precise sensing and faster heating response to optimize performance. Featuring a 50-gallon (nominal) tank and a 40,000 BTU gas burner, the GUF-50 standard vent delivers a first hour rating of 83 gallons and a recovery rate of 42 gallons per hour. With an 0.70 Uniform Energy Factor, this model carries a 6-year limited warranty, and meets Ultra-Low NOx emission requirements. Environmentally-friendly insulation and factory-installed heat trap nipples reduce heat loss for maximum energy savings. This ProLine® XE water heater is designed with A. O. Smith's superior commercial-grade tank protection. Advanced tank features include stainless steel Coregard™ anode rod, Blue Diamond® glass lining and DynaClean™ automatic sediment-cleaning system, all designed to help protect the tank from the corrosive effects of water and extend the life of the water heater. All of these features are accompanied by a 6-year limited tank warranty. A. O. Smith’s ProLine® water heaters are residential products built to commercial-grade standard and are only available for purchase through professional wholesalers and contractors.

Specifications
Tech Specs
Nominal Gallon Capacity
50 Gallons
Rated Storage Volume
48 Gallons
UEF
0.7
Maximum BTUs
40,000
Power Source
GAS
Limited Tank Warranty
6 Years
Limited Parts Warranty
6 Years
T&P Relief Valve
TRUE
Water Connection Size
0.75"
Emissions
Ultra-Low NOx
First Hour Rating
83 Gallons
ASME Certified
No
LEED Rating
1.00
Blanket Included
No
Destination Country
US
Flue Diameter
4.00
Fuel Source
NATURAL
Height to Gas Valve
12.50
Height to T&P
50.50
Ignition Type
Electronic Hot Surface Igniter
Installation Type
INDOOR
Application
RESIDENTIAL
Product Tier
ProLine® XE
Shipping Height 
63.69
Shipping Length 
29
Shipping Width 
23.13
Side Loop
No
Dimension & Venting
Type
Water Heater
Height
57.25"
Diameter
22 in."
Shipping Weight
164lbs
Vent Type
Atmospheric Vent
All Reviews for ProLine® XE Flue Damper Ultra-Low Nox (100 series)
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