Thinking about your next home improvement project? If you’re looking for a simple upgrade that can boost energy efficiency and lower utility costs, insulating your water heater is a great place to start. It’s a quick and budget-friendly project that can make a real difference, especially for older tanks. In this guide, we’ll show you how to do it right, step by step.
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Why Insulate a Water Heater
Just as insulating your pipes, walls, or roof can improve their energy efficiency and lower your monthly bills, adding insulation to your water heater tank can also enhance its efficiency and reduce your monthly expenses. Most newer water heaters come pre-insulated. If you have an older unit, check to see if it’s insulated and has an R-value of at least 24. The R-value measures how well insulation resists heat loss; the higher the number, the better it keeps heat from escaping.
If your water heater tank does not have an R-value of 24 or higher, it is not sufficiently insulated. Insulating the tank can reduce standby heat losses by up to 45%, resulting in savings of up to 16% in heating costs for both gas and electric water heaters. Insulation blankets are far easier to install than foam insulation, foil tape, or other extra insulation for hot water pipes can also help.
Once a homeowner insulates their water tank, they recoup their money within 12 months, even less if you have a large family that takes a lot of showers. Insulating your water heater doesn’t have to break the bank. It’s one of the easiest and most affordable ways to save energy and reduce your energy bills. For as little as $20, you can find water heater insulation blankets or pre-cut fiberglass jackets that are easy to install, improving the energy efficiency of your hot water tank and allowing you to start realizing energy savings immediately.
Do you know the R-value of your water heater? If not, touch the tank. Suppose it’s warm when you feel it. In that case, it needs more installation. Since installing additional insulation can be an extremely doable project that many homeowners could undertake, looking into water tank insulation is worthwhile.
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Before You Get Started
Before you start your DIY project, follow these steps:
● Call your utility company to see if they offer rebates or provide water heater insulating blankets at a low price. Some utility companies will install them for you at little to no cost. Otherwise, you can find water heater jackets, reflective insulation, insulation jackets, fiberglass insulation, or water heater blankets on Amazon or other retailers.
● Check your water heater to ensure it’s not leaking. If it’s leaking, you probably need to replace the unit.
● Identify the type of water heater system you have: gas, electric, or tankless. Insulation may not work on a gas or tankless water heater.
● If you have an electric model, add a bottom board underneath the water heater as well. Adding a rigid piece of insulation or a bottom board under the unit can stop heat loss underneath the water heater, saving up to an additional 9 percent of water heating energy, according to the U.S. Department of Energy. You should install the bottom board when you install a new unit.
● To install the blanket, you will need: 1) a helper, 2) scissors, 3) a marker, 4) a tape measure, 5) gloves, 6) a dust mask, 7) electrical tape, and 8) a water heater insulating blanket kit.
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Step-by-Step Instructions
Step 1: Turn off the water heater.
Step 2: Measure the height of the water heater, and then cut the blanket to fit. Select a blanket with a rating of R-11 or higher. Ensure the top of the water heater is left open; do not block the vent or flue at the top of the tank for a gas water heater.
Step 3: Wrap the blanket around the unit and secure it in place with tape. We recommend positioning the blanket so the ends do not cover the access panels located at the side of the tank.
Step 4: Use the marker to mark the locations of the controls so you can cut them out. Leave plenty of room below the valve and burner areas. When you make the opening, cut it at least 1″ wider than the valve and burner area. Mind the locations of specific parts on the tank. Ensure you leave sufficient room when cutting insulation for items such as the gas valve, faucet, and especially any heating elements. You should also mark the location of the pressure relief valve and pipe. If you’re not sure what this is, it’s the pipe that protrudes from the side of the unit.
Step 5: Align the cutout areas carefully, then secure the blanket in place with tape.
Step 6: Turn your water heater back on. If you have an electric model, don’t let the thermostat exceed 130°F, as it will be prone to overheating.
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If Installing Water Heater Insulation On Gas Water Heaters
It’s important to note that applying water heater insulation to the top of the tank is not recommended for gas water heaters. Properly inspect all venting areas on your water heater to ensure insulation is not blocking or obstructing any of these areas, allowing airflow into the burner area. Since gas water heaters have combustion air flow to the burner located at the bottom, not just the top of the tank, ensure the insulation does not come within 2” of the floor.
Water Heater Maintenance
Water heater insulation isn’t the only way to create an energy-efficient and cost-effective water heater for your home. If you properly maintain your system and proactively address any issues, your water heater can last a long time.
Some everyday water heater issues to watch out for include loss of hot water, low water pressure, discoloration in the water, unusual noises coming from your system, or a visible leak. As a homeowner, you can help mitigate some of these issues by performing a water heater flush annually. Flushing the system cleans out any sediment or dirty water and replaces it with fresh water. Installing a new water heater dip tube in your system is another solution to some of the common problems listed above.
Professional Insulation Services
The best way to ensure a healthy water heater system is to have it serviced and inspected once every couple of years by a licensed professional plumber. These types of inspections include examining the system for any signs of rust, leaks, or other common water heater issues. A-1 Sewer & Septic Service trains its plumbers to inspect all water heaters.
In complex installations, such as those located in tight crawl spaces or homes with heat pump systems, professional insulation services make a significant difference. Insulating pipes and tanks in these confined areas requires specialized insulation materials and techniques, such as pipe wrap or pipe insulation, to prevent heat loss and protect water lines from freezing during colder months.
High-performance insulation options are often available only through professionals who understand the R-values and can recommend materials that exceed standard blankets or jackets. Regular inspections and maintenance ensure your tank water heater maintains an optimal water temperature for extended periods, reducing energy costs while preventing the risk of overheating or inefficiencies.
Another significant benefit is that professionals can conduct comprehensive energy audits during their service visits. These audits identify all potential heat loss points—whether it’s the tank itself, exposed plumbing pipes, or insufficient insulation beneath the unit—and recommend upgrades that maximize your water heater’s overall efficiency.
Ultimately, code compliance is crucial for ensuring safety and meeting insurance requirements. Professionals ensure that any insulation work meets local building codes and manufacturer guidelines. For example, they avoid covering vents on gas water heaters and placing insulation too close to the floor, thereby maintaining proper airflow and reducing fire hazards.
When you choose professional water heater insulation services, trained technicians complete the job safely and efficiently, extend the life of your water heater, and help you save money on monthly energy bills.
Need Help? Call Now
If you need a professional Kansas City plumber to assist you with a water heater issue, please contact A-1 Sewer & Septic Service Inc. to schedule a service call! When it comes to reducing your water heating costs, choosing the best water heater for your home, or installing a new one, it is almost always safer and recommended to work with a professional plumber for the best long-lasting results.