ProLine® Master 40-Gallon Ultra-Low NOx Atmospheric Vent Tall Natural Gas Water Heater

Model HUC-40
4.5 out of 5 Customer Rating
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Capacity (Gallons)
Height Classification
UEF
Advanced Options
Limited Tank Warranty
Diameter
  • Delivers 83-gallon first hour rating
  • 40,000 BTU input atmospheric vent design delivers up to 0.64 Uniform Energy Factor
  • Ultra-Low NOX Green Choice® Gas Burner, meets or exceeds emission requirements in California & Utah
Product Details
  • Delivers 83-gallon first hour rating
  • 40,000 BTU input atmospheric vent design delivers up to 0.64 Uniform Energy Factor
  • Ultra-Low NOX Green Choice® Gas Burner, meets or exceeds emission requirements in California & Utah
  • Push-button piezo ignitor makes lighting pilot fast & easy
  • Patented Blue Diamond® glass tank lining protects against corrosion
  • DynaClean™ automatic cleaning system protects against sediment build-up
  • Stainless steel Coregard™ anode rod protects against corrosion longer than ordinary anodes
  • 8-year limited tank and parts warranty

  • The ProLine® Ultra-Low NOx gas water heater delivers an efficient, reliable performance and features an innovative design that protects against accidental ignition of flammable vapors. Featuring a 40-gallon (nominal) tank and a 40,000 BTU gas burner, the HUC-40 Standard Vent delivers a first hour rating of 83 gallons and a recovery rate of 41 gallons per hour. It has a 0.64 Uniform Energy Factor. It carries a 8-year limited tank 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® 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. 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
40 Gallons
Rated Storage Volume
38 Gallons
UEF
0.64
Maximum BTUs
40,000
Power Source
GAS
Limited Tank Warranty
8 Years
Limited Parts Warranty
8 Years
T&P Relief Valve
TRUE
Water Connection Location
TOP
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
Installation Type
INDOOR
Application
RESIDENTIAL
Product Tier
ProLine® Master
Shipping Height 
62
Shipping Length 
19
Shipping Width 
22
Side Loop
No
Dimension & Venting
Type
Water Heater
Height
58.25"
Diameter
18 in."
Shipping Weight
125lbs
Vent Type
Atmospheric Vent
All Reviews for ProLine® Master Ultra-Low NOx Atmospheric Vent (450 series)
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