The High Efficiency Tankless Water Heater For 2023

Sherry Peterson By, Sherry Peterson
Updated
Rinnai V75eN Non-Condensing Natural Gas Tankless Water Heater
Image credit: Amazon.com

Summary

1. Best Overall: Rinnai V75eN Non-Condensing Natural Gas Tankless Water Heater

The Rinnai V75eN is our new model of tankless water heater that offers a professional installation option. It uses natural gas for fuel and is designed to produce hot water quickly and efficiently. This tankless water heater can operate without the need for a storage tank, so there's never an issue with the warm or cold water running out. The Rinnai V75eN offers an innovative design that combines a durable body with smart digital controls. Read Review

2. Runner Up: Takagi T-H3S-DV-P Condensing High Efficiency Propane Indoor Tankless Water Heater

The Takagi T-H3S-DV-P Condensing High-Efficiency Propane Indoor Tankless Water Heater meets the needs of any household. With on-demand usage, endless hot water, and energy conservation, this appliance is a perfect fit for your home. The Takagi T-H3S-DV-P can use propane or natural gas as its heat source and utilizes computerized safety features to ensure it is properly installed and used. Read Review

3. Best Technology: EZ Ultra HE Natural Gas Indoor Condensing Tankless Water Heater

EZ Ultra HE Natural Gas Indoor Condensing Tankless Water Heater is the easiest way to make your home more energy efficient. With an outdoor-to-indoor heat exchanger that can be vented horizontally or vertically, this heater also boasts a built-in backdraft prevention device and stainless steel horizontal vent pipe. With its condensing technology, it uses exhaust gas to preheat incoming water for added efficiency. Read Review

4. Best Smart: Rinnai RSC199iN Smart-Circ Condensing Gas Tankless Water Heater

Rinnai RSC199iN Smart-Circ Condensing Gas Tankless Water Heater is a professional installation-recommended water heater that circulates hot water continuously, never running out of hot water with this compact tankless gas water heater. Its intelligent recirculation system keeps the hottest water at the faucet and uses less energy than a traditional tank-type heater. It's made with a durable design for long-lasting performance. Read Review

5. Best Space Savings: Rheem Prestige Condensing Tankless Indoor Natural Gas Water Heater

Rheem Prestige Tankless Indoor Natural Gas Water Heaters are the perfect solution for low-maintenance and high-efficiency hot water heating. They offer a warm water supply as soon as they start and include our patented flow meter so you can easily adjust your hot water temperature to your needs. With a compact, space-saving design, these tankless systems offer all the benefits of natural gas without the mess. Read Review

To conserve water in your home, you should turn to a tankless water heater instead of an existing one. Tankless water heaters can save you money and reduce your carbon footprint while providing you with hot water more quickly than older models. They’re also safer: because they don’t store hot water in a water tank, they are less likely to overflow and spill out chemicals when not in use.

Instead of storing hot water for later use during peak times, a tankless heater heats up water as it’s needed for a given household. These appliances operate by transferring heat from the hot water source (for example, an electric or gas-powered shower) into the appliance itself. In some cases, you may have both a tankless and traditional hot-water heater in your home or business; the difference between the two is that with a tankless model, there is no storage tank or inner workings; this means it can be installed almost anywhere without needing further space or plumbing connections. The only requirement is to have an exterior wall where the device will be placed onto.

After nearly 17 hours of research, We think the high efficiency tankless water heater is Rinnai V75eN Non-Condensing Natural Gas Tankless Water Heater. Or you can check the Takagi T-H3S-DV-P Condensing High Efficiency Propane Indoor Tankless Water Heater as the other great option, even if the first option didn't meet all of your requirements.

Our Top Picks

Professional Installation Recommended: Visit the Find a Rinnai PRO page on our website to locate a qualified technician in your area to install your tankless water heater; We do not recommend installing a water heater without a technician

Never Run Out of Hot Water with this Compact Tankless Gas Water Heater: Non-condensing tankless hot water heater from Rinnai is only the size of a small suitcase and fits in a wide variety of spaces, but provides up to 7.5 GPM (5 fixtures at once)

Find Your Rinnai: See our product guides, manuals, energy guide, warranty information, videos, and tables to find the right tankless water heater for your home; Check our Ground Water Temperature Map to see if this heater is optimal for your region

Original Design: Tankless hot water heater only heats when necessary to conserve energy; For the latest in non-condensing technology and a cleaner layout that speeds up service and installation, check out our new RE180eN model

Smart, Durable Design: Enhanced scale detection helps prevent serious, long-term damage to unit; Includes 15-, 5-, and 1-year residential guarantee for heat exchanger, labor, and parts, respectively; See Controlr module for WiFi control (not included)

Endless hot water, On-demand usage, Compact, Space saving, Energy conservation

Satisfies the 2012 SCAQMD Rule 1146.2 for Ultra-Low NOx Emissions

Computerized safety features, No pilot light to have to worry about

TOP Choice #3 EZ Ultra HE Natural Gas Indoor Condensing Tankless Water Heater
Our Score:
9.5
EZ Tankless

FREE SHIPPING

Condensing Technology - The EZ Ultra HE uses exhaust gas to preheat incoming water for added efficiency.

Back-draft prevention device and stainless steel horizontal vent pipe are included.

Capacity Up to 3.4 GPM @ 45F Rise In Ambient Temperature

This heater can be vented horizontally or vertically using 2" Solid Core Schedule 40 PVC/CPVC

Professional Installation Recommended: Visit the Find a Rinnai PRO page on our website to locate a qualified technician in your area to install your tankless water heater; We do not recommend installing a water heater without a technician

Find Your Rinnai: See our product guides, manuals, energy guide, warranty information, videos, and tables to find the right tankless water heater for your home; Check our Ground Water Temperature Map to see if this heater is optimal for your region

Smart-Circ Intelligent Recirculation: This tankless hot water heater features Smart-Circ technology that learns your water usage patterns, then schedules pump and recirucation accordinlgy for superior energy efficiency and convenience

Never Run Out of Hot Water with this Compact Tankless Gas Water Heater: This indoor condensing tankless hot water heater from Rinnai is only the size of a small suitcase, but provides up to 11 GPM (7 fixtures at once)

Smart, Durable Design: With multiple venting options, water heater fits a wide array of spaces; Includes 15-, 5-, and 1-year residential guarantee for heat exchanger, labor, and parts, respectively; See Controlr module for WiFi control (not included)

Hot water without the wait - or the waste

For Indoor use only

Low operating cost - High energy efficiency and water savings setting

Space Savings - Compact, space-saving design. Perfect for a tank replacement.

Water & Gas Leak Detection will shut down unit and provide an error code

Safety features include freeze, overheat, surge protection, and troubleshooting diagnostic codes

Endless hot water, On-demand usage, Compact, Space saving, Energy conservation

Primary heat exchanger utilizes commercial-grade copper alloy for 25 times better heat transfer than stainless steel, Integrated controls and power cord as standard features

Satisfies the 2012 SCAQMD Rule 1146.2 for Ultra-Low NOx Emissions

Computerized safety features, No pilot light to have to worry about

Water & Gas Leak Detection will shut down unit and provide an error code

Auto-Learn Programming - tracks water usage over a period of time and auto-programs to meet hot water needs at peak times

Space Savings - Compact, space-saving design. Perfect for a tank replacement.

Low operating cost - High energy efficiency and water savings setting

Hot water without the wait - or the waste

Low operating cost - High energy efficiency and water savings setting

Water & Gas Leak Detection will shut down unit and provide an error code

Space Savings - Compact, space-saving design. Perfect for a tank replacement.

Hot water without the wait - or the waste

For use indoor only

9 CAMPLUX ENJOY OUTDOOR LIFE Tankless Water Heater Natural Gas
Our Score:
8.4
CAMPLUX ENJOY OUTDOOR LIFE

Outstanding Features- The Camplux tankless gas water heater comes with oxgen-free copper heat exchanger and v-type stainless steel burner,high heating efficiency up to 89.98 %; 90°wind isolation design, this tankless natural gas water heater can anti backflow wind in high floors, the S/S 2.36 ” vent pipe exhaust harmful gases quickly.

Modern Design,Easy Operation -Trendy and modern design with unique white glassy front panel,easy to control the water temperature with LED touchscreen (Fahrenheit and Celsius switch optional).The compact size on demand water heater saves more space than traditional tanks.

Note- The standby electric power of is 2W, working electric power is 42W. Natural gas input pressure is 0.25 psi. There is a pressure relief valve at the water inlet of water heater. It is necessary to manually unscrew the pressure relief valve to drain the water inside the machine in time after using the machine to avoid freezing and blew up when the temperature is lower than 32 ° F in winter.

Convenient, Easy Installation -The tankless water heater uses standard 1/2" BSP water fitting and gas inlet. The water heater comes with1/2 " BSP female to 1/2" NPT male gas connector adapter then you want hook this water heater to natural gas pipe directly.It also comes with 2.3" horizontal vent pipe,ensures efficient power ventilation. You can take Camplux customized wall thimble-WT236 for perfect indoor use.

3.18 GPM Instant Constant Water Heater -Camplux 3.18 GPM tankless water heater natural gas delivers 3.18 gallons per minute of on-demand endless hot water ensures constant comfortable instant hot water for 2-3 persons whole house. 3.18-GPM heater is activated by water flow rather than water pressure; Minimum activation water capacity rate: 0.65 GPM-4.8 GPM; Maximum input rating: 82,000 BTUs; Water connection location/size: Bottom/0.5-inch NPT.

6-In-1 Protection Ensure Your Safety- Dry combustion,flame failure device, anti-freezing protection, over heating protection to ensure your safety. Fully automatic temperature controls with an energy saving mode and child lock technology.

For use outdoors with freeze protection up to -30 degrees

Low operating cost - High energy efficiency and water savings setting

Hot water without the wait - or the waste

Water & Gas Leak Detection will shut down unit and provide an error code

Space Savings - Compact, space-saving design. Perfect for a tank replacement.

Product Images, Product Titles, Product Highlights from Amazon Product Advertising API

What to Look for When Selecting high efficiency tankless water heater?

There are numerous factors for customers to consider whenever they decide to buy a high efficiency tankless water heater. Simultaneously, it comes with many product types and brands, which makes it difficult for you to choose yourself. Thus, we are here to give you support, guidance, and solutions to these problems. Our buying guide will highlight some most outstanding features related to the high efficiency tankless water heater of 2023.

Nowadays, the number of technology sale networks, especially websites, sale forums, or even the online space for customers’ comments, has been dramatically increased. So, you can quickly obtain information on high efficiency tankless water heater available on these sources. 

Along with reading the update of high efficiency tankless water heater on famous websites, you are also expected to go through some needed things below to make a great decision.

Space

A lowboy, or shorter water heater might be the best option if you don't have a lot to heat. They are smaller than average and can be used in small homes. You could also consider mini-tank or tankless water heaters. Although gas water heaters are bulky and heavy, it's possible to get smaller models. The size of electric water heaters is generally smaller. If you have limited space, tankless electric water heaters will be the most suitable option.

Venting Needs

Electric water heaters do not require venting, so they can be placed in any place in your home. When they heat up, gas hot water heaters emit carbon monoxide and other harmful gases. These heaters use a ventilation system made up of pipes and conduits that removes these byproducts. Gas heaters require venting, take up more space, and are less suitable for homes than electric water heaters.

Gas Or Electric

There are many factors that influence the choice of electric or gas-powered water heaters. These include local utility costs and personal preferences. People who want to save money upfront and those who don't have natural gas in their homes prefer electric water heaters. Gas heaters can be more costly upfront, but they will save you many hundreds of dollars per year depending on the energy cost in your region.

Brass Vs. Plastic Drain Valves

A tank water heater has a drain valve located at the bottom that allows for the proper drainage of the tank. The valves can be used with standard garden hoses and made from brass or polyvinyl chloride (PVC). A brass drain valve is better than using plastic for hot water heaters, as brass is more resilient than plastic.

Digital Displays

Modern water heaters have digital controls, which allow homeowners to set up the heater to turn off when they are away from home. Although a digital display can increase the initial price of the heater, it also increases the heat efficiency, which ultimately saves money.

Efficiency Rating

Efficiency ratings are a measure of how efficient water heaters actually heat water. An efficiency rating of.70 for hot water heaters means that 70% of energy used by them heat water.
The difference between electricity and gas rates means that this rating doesn't give a good indication of the cost you could expect to pay for the unit. A gas heater with a lower efficiency rating will be more efficient than one that uses electricity. However, gas heaters are mucher than electric ones.
Because they don't have to run constantly to heat water, tankless heaters are significantlyer than storage tanks heaters. A tankless water heater can cut down on your energy bills by up to 40% depending on how much hot water you use. To determine the impact on your budget, it is better to calculate the annual operating cost for the hot water heater.

Anti-Scale Devices

Some companies advertise that they can reduce mineral scale buildup by swirling water. Although scale may reduce the heater's life expectancy, it doesn't mean you have to spend a lot on fancy options. Look for one that comes with a 122023 warranty. This usually includes an element of a greater or lesser thickness.

Tankless Or Tank

A tank water heater stores a set amount of hot water and is ready to be sent to several appliances simultaneously. The tankless heaters heat the water quickly and require less space than water heaters with tanks. One unit might not heat enough water for multiple fixtures simultaneously, so it is possible to purchase multiple water heaters.

Tank Capacity

You should make sure your tank heater has enough hot water storage to provide heat for your entire family. Although tank heaters are capable of heating water at multiple locations simultaneously, they will require more time to heat the water. This could lead to unexpectedly cold showers.

FAQs

How Often Should I Replace My Water Heater?

According to professionals, your water heater should be replaced every 10 years. A water heater cannot be guaranteed for this long. It is possible that your water heater will need to be replaced sooner than expected.

Gas Vs Electric Water Heaters: Which Is Right For You?

It's not cheap to install a water heater in your house. This is why it's important that you take some time thinking about how to charge your appliances. First, electric heaters offer the most sustainable option for the environment. If you choose one, it will be a better choice for your planet. Although electric water heaters work better, the price of electricity is higher than that of traditional gas options. You can still use your gas heater even if there is no power, so you have less to worry about during a crisis.

How Do You Drain A Water Heater?

First, drain the hot water heater by flushing it with water at full pressure. After connecting the drain line, open the drain valve and close it again. The valve will dislodge any sediment, allowing the system to drain faster.
Then, disconnect your water heater from either the electric or gas power supply and shut down the main water supply. Next, disconnect the drain hose from the quick flush and open the drain valve. Once you let air in the tank, water will not flow out. You will need to remove the hot water pipe from the top of the water heater, and then move the pipe to the side. You will see the tank begin to drain.

Can You Still Shower If Your Water Heater Is Leaking?

You can still take a hot shower even if your water heater is leaking. You can shower even if the leak becomes severe. It will just mean that you won't get hot water.

What Is A Water Heater?

A boiler is often confused with a water heater. What is the difference between a boiler and a water heater? A water heater heats water to be used for showering, cooking, cleaning, or other purposes. The water heater heats cold water coming from the water supply pipe. It then gives you hot water ready to use for washing your clothes or running a faucet. Water heaters use water that's suitable for cleaning and cooking (potable). A boiler, on the other hand is designed to heat your home and heat water from the taps.

How Do Water Heaters Work?

A tank-style water heater uses a dip tube that has an outlet in the bottom to heat the cold water. The tank's temperature is monitored by an internal thermostat which activates either a heating element, or a burner that warms water to the desired temperature.
Dual heating elements are used in electric water heaters to heat the water. The bottom heating element heats the coldest water faster, while the top one warms the water if it becomes too hot.
A pilot light, or electronic ignition system for gas water heaters ignites the gas that is flowing to a burner. Before shutting off, the burner heats water in the tank until it reaches a desired temperature. The exhaust is then vented outside.
Water heaters that are tankless don't keep water. They heat the water by using either electric or gas heating elements. The temperature of the hot water is a factor in how fast it flows, however most units are capable of providing hot water at a flow rate between 2 and 7 GPM.

What Are The Signs Your Hot Water Heater Is Going Out?

A failing water heater can be identified by a series of telltale symptoms, such as banging sounds inside the tank and a decrease in temperature.

Can Water Heaters Explode?

Electric and gas hot water heaters are susceptible to explosions. Explosions are rare, but can be caused by increased pressure in the heater, poor installation or maintenance, failure to set the temperature and relief valve (T & P), gas heaters, flammable liquids, or gas leaks.

How Long Does A Water Heater Last?

Although water heaters come with varying lifespan expectations, many can last for between 8-12 years. Some water heaters can last up to 20 years. Your water quality can make a difference in how long your heater will last. Over time, corrosion can occur from heavy minerals or sediment.
Depending on which model you select, the manufacturer may offer different warranty terms. The most common warranty period is usually between 6 and 9 years.

What Is The Best Compact Water Heater For Saving Space?

Mini-tank or tankless water heaters are compact and light, which makes them great for small homes that have less space.

As mentioned above, all of our information is drawn from actual research, so the accuracy level is reliable. Furthermore, high efficiency tankless water heater of 2023 will be updated regularly to add new data. You should keep a close eye on our websites for any updates or additions.

After all, we are always available to support and assist you with any problems related to high efficiency tankless water heater. Please feel free to contact us as soon as possible. Thank you!


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About Sherry Peterson

Sherry Peterson
Sherry Peterson is an editor for Sanford. She has a passion for home gadgets and beautiful design and loves to share her finds with others. Sherry has been working in the publishing industry for over 10 years and is excited to bring her expertise to Sanford's readers.

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