What is the most efficient hot water boiler?

20, May. 2024

 

Super-Efficient Water Heater

Visit Ask the Experts for more information on when you should replace your water heater.

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Backed by ENERGY STAR

Not only are today’s super-efficient models quieter and more efficient than before – they are backed by decades of research and innovation. Models that have earned the ENERGY STAR are independently certified and come with a minimum 6-year manufacturer warranty for added peace of mind.

Super-Efficient in All Climates

Heat pump water heaters use a hybrid system that reliably and efficiently produces hot water in both warm and cold climates.

Visit Ask the Experts to learn how heat pump water heaters work in cold climates.

Cleaner and Safer for Your Home

ENERGY STAR electric water heaters generate hot water without burning fuel inside the home. They are easy to install and safer to operate with dramatically lower total carbon emissions. If your current water heater runs on gas, oil, or propane, switching to an electric heat pump removes a potential source of carbon monoxide (CO) and nitrogen dioxide (NO2) from your home. It can even help reduce ground-level ozone, a common environmental problem in many metropolitan areas.

Convenient User Controls

Unlike standard electric water heaters, heat pump water heaters include a convenient control panel which allows you to adjust temperature settings and select between various operating modes. Heat pump water heaters are intelligent and easy to use.

Ready to find the right heat pump water heater for your home? The ENERGY STAR Heat Pump Water Heater Installer Finder can help!

Contact us to discuss your requirements of Home Hot Water Boiler. Our experienced sales team can help you identify the options that best suit your needs.

What's the Most Energy-Efficient Water Heater?

Teasing out the costs

Updating your water heater is easy and highly cost-effective in the long run. Of the several types of HPWHs now available from respected brands like A.O. Smith, Bradford White, and Rheem, the models marketed as hybrids are the most popular. In addition to compressors that warm water by trapping heat from the environment, they’re equipped with auxiliary immersion heating units. These components are set to activate automatically during periods of high demand, offering reassurance that the hot water won’t run out, even when the house is full of guests. It’s true that the initial cost of investing in new HPWH technology (from $1,100 before incentives) is higher than what you’d expect to pay for a conventional water heater (from $300). But that additional cost will be more than offset by savings accrued over the lifetime of the appliance—in some cases, within just two to three years. 

The Inflation Reduction Act’s federal tax credits make the HPWH an even sweeter deal. Specifically, the Energy Efficient Home Improvement [Tax] Credit will refund you up to $2,000 per year for these appliances (among other carbon-saving equipment), whether you’re a homeowner or a renter. These funds will be returned to you when you file your federal taxes. And by early 2024, there will be additional incentives from the federal government to electrify water heating and other home equipment, offering rebates of up to $1,750 for low- and moderate-income homeowners to install HPWHs. Some state and local governments and utility companies also offer mail-in rebates at the time of purchase ($1,000 from both New York’s Con Edison and Southern California Edison, for example). 

How to choose the right model

Unless you’re a skilled plumber (and possess the permit required by many municipalities), you’ll probably need to rely on a licensed contractor to buy and install a new heater. Plan to speak to several plumbers in your area to identify those who have experience with HPWHs. Since they currently account for just 1 percent of the water heating market, HPWHs will be unfamiliar territory to many contractors, who may even try to steer you away from energy-efficient options simply because they are more familiar with standard heaters. A qualified professional can also advise you on the right appliance to buy for your home; many municipal utilities list local qualified contractors on their websites.

As a rule of thumb, you may want to choose a heater with a water tank that is larger than the one typically recommended for the size of your household, which will help you to avoid using the hybrid unit’s less-efficient high-demand auxiliary feature. A larger tank that fills with hot water overnight, for instance, will prevent a shortage during bathroom rush hour the next morning. Considering the long-term value of an HPWH, going bigger is worth the additional cost. Water heaters with smart thermostats that initiate heating during off-peak hours (when there is less demand for electricity use) have the added benefit of allowing you to take advantage of clean energy at a lower cost, while still delivering plenty of hot water when you need it most. They essentially act as “batteries” for storing clean energy.

Evolving technology: The space heater that also does air-conditioning

In addition to heating water, heat pump technology can also be used to heat and cool air as an energy-efficient alternative to standard air conditioners (ACs) and furnaces. Just like HPWHs, heat pump space heaters simply move heat from a cool space to a warm space instead of burning fuel to generate heat, thereby reducing emissions and lowering your utility bill. One of the biggest advantages to owning a heat pump is that it’s a two-in-one system—you get both heating and cooling for the price of one.

Right now, only 16 percent of homes in the United States use heat pumps for space heating and cooling. It is the job of policymakers to provide the right incentives to help consumers and installers get more familiar with and excited about these advanced, healthy, climate-friendly technologies. If this technology became the standard for people installing new ACs within the next three years, we could see them in every home by 2050.

This story was originally published on December 11, 2020 and has been updated with new information and links.

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