40-Gallon Tall Ultra-Low NOx Natural Gas Water Heater - 6 Year Warranty - 6 40 UNBCT 450

Model 6-40-UNBCT 450
Capacity (Gallons)
Height Classification
UEF
Advanced Options
Limited Tank Warranty
Diameter

  • 6-year limited tank & parts warranty, 1-year labor warranty
  • 83-gallon first hour rating
  • Flammable vapor ignition-resistant design

    • 40-Gallon Tall Ultra-Low NOx Natural Gas Water Heater - 6 Year Warranty - 6 40 UNBCT 450
    Model 6-40-UNBCT 450
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    Product Details
    • 6-year limited tank & parts warranty, 1-year labor warranty
    • 83-gallon first hour rating
    • Flammable vapor ignition-resistant design
    • Flexible 3” or 4” venting option
    • All models meet South Coast Air Quality Management District Ultra Low NOx emission requirements
    • Enhanced combustion system
    • Smooth, efficient, and quiet operation

      • The 6-40-UNBCT 40-Gallon Tall Ultra-Low NOx Natural Gas Water Heater delivers ideal hot water for households with 4 people when sized appropriately. The environmentally friendly 40,000 BTU Ultra Low NOx gas burner delivers 83 gallons in the first hour.

      An electronic gas valve provides precise temperature control for optimum hot water delivery. The self-diagnostic electronic gas control monitors and reports on system status via an LED status indicator. A built-in safety system reduces the risk of accidental flammable vapor ignitions.

    Specifications
    Tech Specs
    Nominal Gallon Capacity
    40 Gallons
    Rated Storage Volume
    38 Gallons
    UEF
    0.64
    Maximum BTUs
    40,000
    Power Source
    GAS
    Limited Tank Warranty
    6 Years
    Limited Parts Warranty
    6 Years
    T&P Relief Valve
    Yes
    Water Connection Location
    TOP
    Water Connection Size
    0.75"
    Emissions
    Ultra-Low NOx
    First Hour Rating
    83 Gallons
    ASME Certified
    No
    Blanket Included
    No
    Destination Country
    US
    Flue Diameter
    4.00
    Fuel Source
    NATURAL
    Height to T&P
    51.75
    Ignition Type
    Pilot with Piezo Igniter
    Installation Type
    INDOOR
    Application
    RESIDENTIAL
    Shipping Height 
    62.31
    Shipping Length 
    24
    Shipping Width 
    21
    Side Loop
    No
    Dimension & Venting
    Type
    Water Heater
    Height
    58.25"
    Diameter
    20 in."
    Shipping Weight
    146 lbs
    Vent Type
    Atmospheric Vent
    Height to Gas Valve
    11"
    Maintenance & Troubleshooting Videos
    Maintenance

    Residential Series Atmospheric Vent Lighting the Pilot

    Troubleshooting

    Residential Series Atmospheric Vent Draft Test

    Residential Series Atmospheric Vent No Hot Water

    Residential Series Atmospheric Vent Status Code 1 Flash

    Residential Series Atmospheric Vent Status Code 2 Flash

    Residential Series Atmospheric Vent Status Code 4 Flash

    Residential Series Atmospheric Vent Status Code 5 Flash

    Residential Series Atmospheric Vent Status Code 7 Flash

    Residential Series Atmospheric Vent Status Code 8 Flash

    Residential Series Atmospheric Vent Status Code Light Continuous

    Marketing Videos
    Residential Series Atmospheric Vent Application and Installation
    Residential Series Atmospheric Vent Features and Benefits
    Residential Series Atmospheric Vent How It Works