ProLine® Master 40-Gallon Short Electric Water Heater

Model HNS-40
4.4 out of 5 Customer Rating
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Capacity (Gallons)
Limited Tank Warranty
Height Classification
Blanket
First Hour Rating
  • Delivers 55-gallon first hour rating
  • Long-lasting upper and lower 4,500-watt Incoloy™ heating elements deliver reliable and efficient hot water
  • Advanced stainless steel Coregard™ anode rod provides additional protection against tank corrosion
Product Details
  • Delivers 55-gallon first hour rating
  • Long-lasting upper and lower 4,500-watt Incoloy™ heating elements deliver reliable and efficient hot water
  • Advanced stainless steel Coregard™ anode rod provides additional protection against tank corrosion
  • Patented Blue Diamond® glass tank lining protects against corrosion
  • DynaClean™ automatic cleaning system protects against sediment build-up
  • Commercial-grade brass drain valve for durable and easy operation
  • CSA Certified and ASME Rated T&P Relief Valve, Factory-Installed
  • HUD compliant, approved for mobile homes/manufactured housing
  • 8-year limited tank and parts warranty

  • The ProLine® Master Electric water heater with Top Water Connections is the reliable choice when you want to maximize hot water output and energy savings. With a 40-gallon (nominal) tank and dual 4,500 watt elements, the HNS-40 delivers a first hour rating of 55 gallons at a highly efficient 0.95 Uniform Energy Factor rating. Environmentally-friendly insulation and factory-installed heat trap nipples reduce heat loss for maximum energy savings. This ProLine® Master 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 8-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
40 Gallons
Rated Storage Volume
37 Gallons
UEF
0.92
Power Source
ELECTRIC
Limited Tank Warranty
8 Years
Limited Parts Warranty
8 Years
T&P Relief Valve
TRUE
Water Connection Location
TOP
Emissions
Low NOx
First Hour Rating
55 Gallons
ASME Certified
No
Blanket Included
No
Destination Country
US
Installation Type
INDOOR
Max Wattage
4,500
Number of Elements
2
Application
RESIDENTIAL
Product Tier
ProLine® Master
Shipping Height 
53.5
Shipping Length 
23.69
Shipping Width 
21.5
Side Loop
No
Voltage
240
Dimension & Venting
Type
Water Heater
Diameter
20.5 in."
Shipping Weight
98lbs
Maintenance & Troubleshooting
Maintenance

ProLine® Electric Adjusting the Thermostat

ProLine® Electric Checking and Replacing Lower Heating Element.

ProLine® Electric Checking and Replacing Upper Heating Element.

Troubleshooting

ProLine® Electric Tripped ECO

All Reviews for ProLine® Master Standard Electric (110 series)
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