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

Model GUF-50 100
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

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    What to Expect from this Model
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    Number of minutes you can enjoy a shower before running out of hot water. Assumes a 2.1 GPM flow rate
    34 minutes
    single shower length
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    Number of back-to-back showers you can take without running out of hot water. Assumes a 2.1 GPM flow rate and an 8 minute shower length
    4.2 showers
    back-to-back
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    Number of showers you can take at the same time without running out of hot water. Assumes a 2.1 GPM flow rate and an 8 minute shower length
    3 showers
    at the same time
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    Biggest tub this water heater will fill without running out of hot water. Assumes a 5.0 GPM flow rate, and a 67% fill level
    83 gallons
    max tub size
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    The estimated annual cost to operate this water heater in your location
    $297/year
    est. energy cost
    Based on location results for Columbus, OH 43215
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    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
    • 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 standards 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
    Yes
    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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