Power of Community - Pedernales Electric Cooperative

Insulate your electric water heater tank

Nov 16, 2016

If you're looking for a simple do-it-yourself project that will help you use less energy and lower your electric bill, consider adding a blanket of insulation to your water heater.

Insulate water heater tank to save energy

You'll need a few simple tools, including scissors, duct tape and a water heater blanket, which you can find at your local hardware store.

  1. First, turn off the electric water heater at the breaker panel.
  2. Measure the height of the water heater and cut the blanket to fit, if necessary.
  3. Don't cover the top of the water heater with insulation.
  4. Wrap the blanket around the water heater and temporarily tape it in place. Position the blanket so the ends do not come together over the access panels on the side of the tank.
  5. Mark the areas, then cut holes where controls are located. For electric water heaters, there will be two panels on the side of the tank. Mark the area where the pressure relief valve and pipe are located. This will be a pipe that protrudes from the side of the water heater.
  6. Safety note: Don't set the thermostat above 130°F on an electric water heater with an insulating jacket or blanket – the wiring may overheat.

  7. Adhere the blanket. Be careful to line up the cut out areas and then tape the blanket in place.
  8. Turn the water heater back on.

— U.S. Department of Energy

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