Many of today’s homeowners are finding a Marathon electric water heater to be a great investment. Why? Because we appreciate its energy efficiency. Marathon’s Envirofoam insulation keeps hot water hot, much longer than any other water heater, and it contains no ozone depleting chemicals, so you’re partnering with the environment. Because it has a plastic tank, the Marathon can’t rust or corrode. And its Lifetime Tank Warranty will save you the future expense of buying a replacement heater and having it installed.