Large Capacity Water Heaters

Large Capacity Water Heaters

Below are three large capacity water heaters available to local consumers through a local plumber or a home improvement store. They both meet the Department of Energy’s most recent requirements for large capacity water heaters. Incentives are available for installing water heaters on off-peak.

Please call our energy management department at 800.248.3292 for current incentives.

Marathon Heavy Duty

Available sizes: 105 gallons

Warranty: 6-year parts warranty and lifetime tank warranty when owned by original purchaser with proof of purchase (online registration required). 15 year tank warranty if no proof of purchase or not original owner.

Tank material: Seamless, blow molded polybutene; multiple layers of filament wound fiberglass; polyurethane insulation.

Availability: Local plumbers, Menards or Home Depot. Members may also try Northwest Pipe Supply in Fargo for parts..


Model number Capacity Height (in) Diameter (in)
MRG105245 105 70.75 30.25


Capacity: 105 gal.

Height: 70.75"

Diameter: 30.25"

Marathon heavy duty water heater


Available sizes: 100 and 115 gallons

Warranty: 6-year parts warranty and lifetime tank warranty (online registration required).

Tank material: Laser welded through a concentrated heat source producing high quality, long lasting, 316L stainless steel tank; lightweight; no anode rods needed.

Availability: Local plumbers and online through Menards and Home Depot.


Model number Capacity Height (in) Diameter (in)
WEG100C2X045H 100 61 27
WEG115C2X045H 115 70.5 27


Capacity: 100 gal.

Height: 61"

Diameter: 27"


Capacity: 115 gal.

Height: 70.5"

Diameter: 27"

Westinghouse light commercial water heater

Vaughn V-Grid/Featherweight

Available sizes: 119 gallons

Warranty: 15-year tank warranty. Lifetime warranty optional.

Tank material: Thermoplastic vessel construction with three inches of non-CFC, spray-in foam insulation.

Availability: Local plumbers and contractors.

Model number Capacity Height (in) Diameter (in)
P120F 119 80.5 30


Capacity: 119 gal.

Height: 80.5"

Diameter: 30"

Vaughn V-Grid water heater