In addition to providing low cost electricity, Delaware County Electric Cooperative sells efficient electric hot water heaters.


Some things you don't see right away - like its tough but lightweight polyethylene outer shell. Others don't become apparent until you've owned a Marathon for a while - like the fact that it is incredibly energy efficient - or the value of your Marathon water heater being warranted not to leak for as long as you own your home. Sounds Good - and it is.



Delaware Electric Co-op's Marathon Water Heater Size List:

Marathon Heater
30 Gallon
50 Gallon Short
50 Gallon Regular
75 Gallon*
85 Gallon*
105 Gallon*

* Marathon MHD series heaters larger than 55 gallons are designed for light duty commercial applications.

Note: DCEC members may be eligible for a $50 discount on Marathons provided they are converting from Fossil fuel (propane/oil), at least a 30 Gallon, use load control, and meet the minimum monthly usage requirements of 350 kWh. Please call (607) 746-9284 to learn more about the $50 member only discount. Please note all above prices subject to change.

Frequently Asked Questions:

How much more is the Marathon than a conventional water heater?

The Marathon will cost approximately 2 to 3 times more than a basic steel water heater. That is not a real comparison as you are comparing a lifetime warranty product that is super insulated against a 5 or 6 year warranty product with minimal insulation. Installation for the Marathon is no more and sometimes less than for steel units.


Is it worth more than a conventional water heater?

Yes. The Marathon will save you energy after year and after five years it won't have to be replaced. The cost of the water heater is usually only half your cost. Installation is the other cost and you won't have to pay for that and another water heater in five years The other thing people often overlook is the damage to their floor and belongings when their cheaper water heater fails.


Why should I bother, my last water heater lasted 22 years?

That's impressive but not uncommon for older water heaters. Older water heaters had much thicker steel and more porcelain than today's units. Because manufacturers have cut so many costs from the manufacturing process, most steel water heaters made today will not last much longer than their warranty.


Can I install it myself?

We do recommend you have a professional do the installation, but if you are experienced, you can. The Marathon comes with a clear installation guide - just note that there are a couple of small but important differences between installing the Marathon and a standard tank.


I am building a new house, wouldn't gas be cheaper?

Not necessarily. Although gas may be slightly cheaper, gas water heaters are more expensive than electric units and the venting now required for safety can be quite expensive. The thing to remember is that electric water heaters are nearly 100% efficient, as all of the heat generated stays in the unit instead of some going up the flue. Also, the Marathon is like a Thermos® in that it keeps the water hot once you have made it. It's the most efficient water heater made.

Many people are now building tighter, more efficient homes than they used to and indoor air quality is becoming a concern. Any fossil fuel water heater can be a problem with carbon monoxide, NOX, and other pollutants needing to be vented. You can eliminate this issue entirely, however, with the energy-efficient, electric Marathon.


What size do I need?

We carry several Marathon sizes: the 30, 50, 75, 85, and 105 gallon models. How many people do you have in your family? Any other large hot water uses in your home?

# people


(or water heater under control)


Tank Size




* Marathon MHD series heaters larger than 55 gallons are designed for light duty commercial applications.
* Click HERE for Limited Warranty

For more information about Marathon heaters, contact us at or click here.