Kenmore 55940  40 gal. 9-Year Tall Natural Gas Ultra Low NOx Water Heater (Select California Markets)

Kenmore 55940 40 gal. 9-Year Tall Natural Gas Ultra Low NOx Water Heater (Select California Markets)

Item # 04255940000P Model # 55940
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The Kenmore 55940 40-gallon residential natural gas water heater is energy-efficient, with foam insulation, and has a cobalt blue glass-lined tank with a large anode rod to protect the tank from corrosion.

A 40-gallon natural gas water heater is the minimum recommended size for a 2- to 4-person household with typical water use.

  • 9-year warranty on tank and parts
  • 1 inch of energy-efficient foam insulation
  • Self-cleaning cold water inlet tube
  • Cobalt blue, ultra-coat, glass-lined tank with anode for corrosion protection
  • Factory-installed temperature and pressure relief valve


Parts Warranty 9 year limited
Tank Warranty 9 year limited
Tank Insulation Thickness 1 in.
Tank Diameter (In.) 17.75
Tank Height (In.) 58.5
Height to Water Connection (In.) 60.5
Water Inlet/Outlet Size 3/4 in.
Height to Vent Hood (In.) 62
Gas Inlet Size 3/4 in.
Height to Gas Connection (In.) 13
Product Overview:
Unit Location Indoor
Materials & Finishes:
Drain Valve Plastic
Tank Lining Glass
Heating Range (deg F.) 55 - 155
Tank Nominal Capacity 40 gal.
Size Category - Gallons 31 gallons to 40 gallons
Rated Storage Volume (gal.) 38
Uniform Energy Factor (UEF) 0.54
Flow Rate:
Recovery at 90 Degree Rise (gph.) 41
First Hour Rating (gal.) 66
Control Type Digital
Power Source:
Fuel Type Natural gas
Product Includes:
Power Cord Included No
Relief Valve Included Temperature and Pressure
Appliance Features:
Number of Anode Rods 1
Heat Trap Fittings Yes
Tank Style Tall
Low NOx Burner Yes
Heavy Duty Anode Rod Yes
Self Cleaning Yes
Venting Atmospheric (standard)
Power & Performance:
Gas Input (btu/hr) 40000
Maximum Operating Pressure (psi.) 150
Certifications & Ratings:
Altitude Rating (ft.) 5400
Required Vent Size 3 in. or 4 in.
Color Family Gray


SoldBy Sears
ItemPNO 04255940000
MfgPartNumber 55940
BrandName Kenmore

SSIN : 04255940000P

UID : 5e19116c-7ff6-4b05-b32a-e5df40ab5718

ProductURL /kenmore-55940-40-gal-9-year-short-natural
FulfilledBy Sears