Skip to main content

Installing an Insulation Blanket on an Electric Water Heater

Important Note: Installation of an insulation blanket on gas and oil-fired heaters can be more challenging. Please consult a qualified HVAC contractor for specific instructions.

  1. Cut the top insulation of the blanket to fit around the piping at the top of the water heater tank. After fitting it, use tape to secure the cut section.
  2. Fold the corners of the top insulation downward and tape them to the sides of the tank.
  3. Place the insulating blanket around the tank’s circumference, ensuring that the ends do not overlap directly over the access panels on the tank’s side. Note: Some tanks may have only one access panel.
  4. Use the provided belts to firmly secure the blanket in place. Position the belts not to cover the access panels (Figure 2). The belts should be snug but avoid compressing the blanket by more than 15% to 20% of its thickness. Installing the blanket becomes easier with two people. If working alone, use tape to hold the blanket on top until you can position the belts correctly.
  5. If your water heater has the temperature/pressure relief valve and the overflow pipe on the side of the tank instead of the top, ensure that these items are outside the blanket. Depending on the arrangement and location of the piping, you may need to compress or cut the blanket accordingly.
  6. Identify the four corners of the access panel(s). Make an x-shaped cut in the insulating blanket from one corner to the opposite corner of each access panel.
  7. Fold the triangular flaps created by the cuts underneath the insulating blanket. Repeat steps 6 and 7 for the rating/instruction plate.

Important: Do not install the blanket on a leaking water heater tank.

Please note that these instructions specifically apply to electric water heaters. For gas and oil-fired heaters, seeking guidance from a qualified HVAC contractor is recommended to ensure proper installation.