How To Insulate Blanket For Your Tankless Hot Water Heater?

winter seasons in Canada, the USA, and the UK are pretty cold, and without proper precautions, you can’t protect your family from the dull drab chill winter season. Your tankless water heater may damage badly due to cold weather. As we all know, standing water inside your water unit can turn into ice that will create rust in the internal components of your tankless water heaters. To protect your water heater from freezing proper insulation is very important to increase water unit performance and save your energy bills.

Tankless water heater insulation is just like walls or roofs. Insulating your tankless hot water heater is an inexpensive easy and way to improve your water heater performance, life and save your energy bills. If you have a new tankless water heater, you don’t need to insulate it because it is already insulated from the manufacturer. If you have an older hot water unit, then you may need insulation with an R-value of at least 24. 

What Is An Insulation Blanket? 

An insulation blanket, or tankless hot water heater blanket work as its name sounds. It’s a blanket it will save your water heater from seasonal effects, losing heat and work proficiency. To save your water heater from cold winter you just need to wrap or cover around your tankless water heater to keep it safe. Insulation blanket helps your water heater to produce contestant hot water supply without losing its temperature.

                               Types of Insulation Blanket

Insulation blankets are made with multiple materials like foil and fiberglass. Insulation blankets depending upon how much insulation your tankless hot water heater needs. They’re rated on their R-value, which measures thermal resistance. The materials of the blanket affect the R-value, so always prefer its thickness. For a hot water heater in a room, garage or outdoor closet choose a blanket with a higher R-value.

Types Material Applicable Environment Friendly Flammable
Types Material Applicable Environment Friendly Flammable
Batts & Rolls Fibreglass



Plastic Fibers

Natural Fibers

Unfinished Walls

Foundation Walls

Floors & Ceilings

Yes No
Concrete Blocks Insulation Foam Board, Placed on Outside of Wall Unfinished Walls Foundation Walls

New Construction

Walls (insulating concrete blocks)

Yes No
Foam Board


Rigid Foam





Unfinished Walls Foundation Walls

Floors and Ceilings

Unvented Low Slop Roofs

No Yes
Insulating Concrete Foam Polyisocyanurate


Unfinished Walls, Foundation Walls

Floors and Ceilings

Unvented Low Slop Roofs

No Yes

Fibre Insulation

Fiberglass Mineral Ducts in unconditioned spaces

Insulation that can withstand high temperature

Yes No
Structural Insulation Panel Foam board or Liquid Foam Insulation Core

Straw Core Insulation

Unfinished walls, ceiling, floors, news constructed roofs Yes No

Do I Need A Hot Water Heater Blanket?

Water heater installation depends on the age of your tankless hot water heater.

Before installation your water heater you have to consider few things for covering your hot water heater in a blanket, such as;

  • Where is your hot water heater stored?
  • Difference between the water heater temperature and the indoor temperature?
  • How old your water heater is?

If the temperature of your inside home is warm, then probably you don’t need more insulation from the blanket since your home is keeping it warm. If you place your water heater outside the home, where the external temperature is significantly different than the hot water heater temperature then you need insulation for your tankless water heater. A hot water heater blanket is a smart choice to retain the heat of your water heater and reduce the chances of wasted energy.

The difference in temperature between the hot water heater and the indoor temperature will cause a higher amount of heat loss. To keep your water hot water, cover your heater from insulating from the blanket to get constant hot water for your bath and daily house chores.

   Blankets For Gas And Electric Hot Water Heaters

Your water heater insulation depends on whether your hot water heater runs on gas or electricity. precautionary measurement of insulating your water heater.

Gas Hot Water Heaters

  • Don’t smother the flame and any part of the blanket underneath the heater
  • Don’t cover the top of the gas water heater because the exhaust needs a place to exit.

Electric Hot Water Heaters

  • Don’t cover your electric water heater’s heating-element access panels
  • Leave controller, pressure and temperature relief valves uncovered of your electric water heater

   Benefits Of Instigating Blanket  To Your Water Heater

When you are cold in winter, cuddling up with blankets can definitely keep you warm and save you from freezing in the chill winter season. If you use a tankless water heater which needs to be equipped with a water heater blanket. Water heater blankets are quite simple, and can easily, you will not require special skills or equipment to blanket your tankless water heater. Here in this section, you will learn about the benefits of purchasing a blanket or cover for your water heater to protect its outer layer from weather damages.

However, do not be fooled by the simple nature of a water heater blanket. They can save you a great deal of money on your gas bills, as well as reducing your energy consumption. Water heater blankets can even save you time, and money. There are significant advantages of having a water heater blanket installed on your water heater tank.


Covering your tankless water heater with a blanket allows it to retain heat better. In return, it will help you save money on your energy bills. Although putting your water heater blanket acquire costs and also costs time to install. Putting a water heater blanket on your water heater is still money-saving in the long run after the blanket does not retain heat and save your money by constant host water supply.

Save Energy

Your water heater blanket will also reduce the amount of energy. If you are interested to protect the environment, this can be a big bonus, to installing a water heater blanket. By spending few dollars on your water heater blanket will dramatically reduce the number of fossils fuels your home consumes. In contrast, if you do not use a water heater blanket, you will consume energy that is only used to inefficiently heat the outside of your water heater. A water heater blanket can help you to “go green” at home.

Energy Efficiency

When your water heater is running at peak efficiency, it wastes hot water throughout the day. By the time, when you go to take a shower, you are left with freezing cold water. A water heater blanket allows your water heater to work more efficiently, and supply you with hot water at the right time.


A water heater blanket helps to keep your water heater running more efficiently. If your water heater is using less energy to successfully heat the water in its tank, this means that the water will retain heat, this happens only when you will find yourself running out of hot water infrequently.

How To Insulate Your Water Heater?

If you want to insulate your hot water heater, there’s one easy way to insulate it for optimum efficiency and performance. New and advanced tanks don’t need extra insulation, if you want to wrap your hot water heater, check the R-value on your tank’s sticker. This number indicates the material of your tank is made off. The higher the R-value, the better. If the R-value of your water tank is below 24, you should insulate it. If you want to wrap your hot water heater, follow these steps to learn how to insulate your hot water heater. Let’s take look;

Gather Insulation Material

To insulate your hot water heater, you will need certain materials such as;

  • Dust mask
  • Gloves
  • Electrical Tape
  • Scissors
  • Marker

Energy companies sell insulation blankets at a reasonable cost to encourage their users to wrap their hot water heaters. If your energy company doesn’t sell insulation blankets, you can buy them from the local hardware store that will easily fit your hot water tank.

Turn Off Your Water Heater 

You need to turn off the power to your water heater. If you are going to insulation blankets on an electric water heater at first power off the circuit breaker. If you’ve a gas water heater, turn off its gas valve before your insulation blanket.

Wrap A Blanket Around Your Water Tank 

If the blanket doesn’t fit your water heater perfectly, you will need to customize it by yourself. A loose insulation blanket won’t insulate your hot water heater effectively, so wrap the blanket around your water. Do not wrap your tankless gas water heater from the top.

Cut Out Space 

For insulating blanket on your tankless water heater use the marker to trace the locations. Remove the blanket and cut out certain spaces such as; gas valves, burner elements, pressure releases valves, or pipes, so that those parts are exposed and accessible.

Tap Insulation & Turn On The Power Button

When you’ve cut out necessary holes, wrap your water heater and tape it securely. Before you turn the power back on, drain and flush your tankless water heater properly.

Low Down The Temperature Of Your Water Heater

After insulating the water heater, you should change the setting of your water heater and lower the temperature which will reduce your energy bills Once you’ve wrapped your water heater, you don’t need to set the temperature higher than 130°, and 120°, it is perfectly fine for household tankless water heaters.

Five Ways to Improve Water Heater Efficiency 

An average conception of hot water is 20 gallons per day. In this section, I’ll share five smart tips to help your water heater to provide hot water. Before setting your water unit wear gloves to protect your hands, you may want to wear old clothes and where N95 mask to protect yourself.

Adjust the Temperature of Your Water Heater Tank

To increase the life of your hot water tank, adjust its temperature control. You find the dial on the outside of tanks, for this, you need a screwdriver to remove a side panel to locate the dial. According to home specialists, a hotter setting of your tankless water heater doesn’t make your water unit more efficient, infect it will take more cold water to bring back down. You have to adjust your tankless water heater to 120 degrees F that’s an ideal setting for the average water unit to produce hot water constantly.

 Insulate Hot and Cold-Water Pipes 

If you want to keep on enjoying your hot shower and want hot water will remain in the pipes Insulate hot and cold-water pipes. Most people place your hot and cold-water pipe simultaneously then your hot water becomes cool, that’s why you need to insulate all water pipes throughout your home. When you are fixing your water pipes, try your hot and cold-water pipes closest to your water tank, and cover their joints with an elbow or T-shaped pipe insulation. By covering gaps, you can continuously enjoy hot water without any tension.

 Insulate Your Water Heater Tank With An Insulation Blanket 

If your tank feels hot, there is heat loss, so you have to wrap your tank. put insulation at the top if you have an electric water tank, if you have an oil or gas water tank keep insulation away from combustion gases

Ensure Leakage Spot on Your Water Heater Tank

When your hot water tank leaks, you have to mark the place. water heater leakage increases your energy bill. To overcome your leakage problem, you can install a flooded ring or use a caulk to seal it. If you find any leakage in your water heater, shut off the valve until and unless you will fix the leakage problem.

 Consider Eco-friendly Appliances 

For the safety of your love once, always consider eco-friendly and low-flow appliances to overcome any tragedy.


Insulating your water heater will enhance performance and energy bills. If you insulate your water tank, which will reduce standby heat losses from 25%–45% and save you about 7%–16% in water heating costs. Nowadays mostly tankless water heaters have built-in heaters to prevent such issues. Makes sure by pour a water heater plugged in and connected to a reliable power source. Insulating a blanket on your water heater will save you over $1,000 in energy costs over the lifespan of your water heater!

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