The High Efficiency Hot Water Heater For 2023

Summary
1. Best Overall: Bosch Electric Mini-Tank Water Heater Tronic 3000
The Bosch Electric Mini-Tank Water Heater Tronic 3000 can be installed vertically or horizontally. The tank has a maximum capacity of 5 litres and is designed so it can heat water for a long time without any interruption. The water heater also comes with a built-in thermostat, making your home warmer in winter and cooler in summer. Read Review
2. Runner Up: Rinnai RL94eN Non-Condensing Natural Gas Tankless Water Heater
The Rinnai RL94eN Non-Condensing Natural Gas Tankless Water Heater is the perfect solution for a single family or small business. With an affordable price point, this innovative tankless water heater provides consistent, on demand hot water. The Rinnai RL94eN offers a durable design with an original design and professional installation recommended. Read Review
3. Best Compact: Takagi T-H3S-DV-P Condensing High Efficiency Propane Indoor Tankless Water Heater
Stop wasting money on hot water heaters that break down, have to be lit, and require maintenance. Takagi’s indoor tankless water heater offers computerized safety features such as automatic electric cut-off when it gets too hot, no pilot light to have to worry about, endless hot water at the touch of a button and a compact frame that can fit almost anywhere. No more wasted space in your home. Read Review
4. Best Instant Heating: Rinnai RU199iN Condensing Tankless Hot Water Heater
Free up wasted space with the Rinnai RU199iN tankless hot water heater. With its space-saving design, this efficient and cost-effective unit heats only when necessary, so you'll save on energy costs and enjoy quick and easy hot water. A low-flow version is also available for those who want a more environmentally friendly option. Read Review
5. Best Convenient: Camplux High Efficiency Natural Gas Tankless Water Heater
Camplux Tankless Water Heater is a modern and stylish water heater suitable for all kinds of homes. This tankless water heater offers the convenience of instant constant heating when you need it, and with only one moving part, this efficient heater provides outstanding value for money. The Camplux Water Heater is very easy to install and has an on/off switch with a timer to provide the ultimate in convenience. Read Review
Your water heater is your home’s largest energy consumer. Installing an efficient replacement can make a significant difference in your monthly energy bills and decrease the carbon footprint of your home. Hot water storage tanks are one of the most common places where homeowners can save money by upgrading their hot water system.
Efficient hot water storage heaters require much less energy to heat than older models, which means you’ll see savings on your electricity bill each month. An upgrade from an older tank will also raise the temperature of your water as it leaves the tank, resulting in higher temperatures that are more likely to be used for bathing or laundry. You don’t need to live with an inadequate tank any longer.
After doing extensive study and analysis over a considerable time, We think the high efficiency hot water heater is Bosch Electric Mini-Tank Water Heater Tronic 3000. Other options presented here are certainly worthy of your attention, and in order to assist you in making an informed choice, We have compiled the following helpful buying guide.
Our Top Picks

RELIABLE WATER SOURCE: Easily hard-wire the 7-gallon model to provide the on-demand reliable water source your home or office needs
IMPORTANT INFORMATION: Heating capacity of 1440 watts and a temperature range of 65-145°F max. Operating pressure-150 psi. Water fittings-3/4 inch Male NPT. Electrical requirements (Amp 12A/Volts 120)
CONVENIENT HOT WATER HEATER: 7 gallon point-of-use mini-tank fits under your sink to provide hot water right where you need it. Thermal efficiency is 98%. Dimensions : 17.5 W x 17.5 H x 14.5 D Inches
EASILY MOUNTED: Can be shelf or floor mounted. Wall mounting available in vertical orientation only (water connections on top) - bracket included. Simply tap into the cold water line and install the water heater directly at the sink to provide hot water
INSTALLED VERTICALLY OR HORIZONTALLY: This larger model can be mounted vertically (5.1 gal. of water supply) or horizontally (7 gal. of water supply)- vertical orientation is installed with the cold and hot lines on top of the unit

Smart, Durable Design: Includes 12-, 5-, and 1-year residential guarantee and 5-, 5-, and 1-year commercial factory warranty for heat exchanger, labor, and parts, respectively; See Controlr module for WiFi control (not included)
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 9.8 GPM (6 fixtures at once)
Original Design: Tankless hot water heater's Circ-Logic technology offers recirculation patterns that match your habits; For the latest in non-condensing technology that speeds up service and installation, check out our new RE180eN model
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

Satisfies the 2012 SCAQMD Rule 1146.2 for Ultra-Low NOx Emissions
Computerized safety features, No pilot light to have to worry about
Endless hot water, On-demand usage, Compact, Space saving, Energy conservation
Endless Hot Water: Enjoy unlimited hot water flow throughout the house; compact, durable, and easy to install; professional installation recommended
Energy and Space Efficient: Space-saving design conserves energy as it heats only when necessary
Optimal Water Pressure: Up to 11 GPM hot water flow rate for a powerful, constant stream
Guaranteed to Last: 15-, 5-, and 1-year residential for heat exchanger, labor, and parts, respectively. Wifi monitoring.
Instant Heating: Equipped with Circ-Logic - Pair with an external pump to reduce wait time for hot water via scheduled or on-demand recirculation

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.
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.
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.
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.
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.

Best Operating Cost
Rheem Prestige High Efficiency 9.5GPM Indoor Natural Gas Tankless Water Heater
Low operating cost - High energy efficiency and water savings setting
For use indoor only
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.

Best Engergy Saving
Takagi T-H3S-DV-N Condensing High Efficiency Natural Gas Indoor Tankless Water Heater
Satisfies the 2012 SCAQMD Rule 1146.2 for Ultra-Low NOx Emissions
Endless hot water, On-demand usage, Compact, Space saving, Energy conservation
Computerized safety features, No pilot light to have to worry about
Dimension:22.5"H x 17.75"W x 10.75"D
Tankless Gas Water Heaters are cost saving and energy efficient
Easy, Convenient Control –Easily adjust water temperature ranging from 85˚F–140˚F
For use outdoors with freeze protection up to -30 degrees
Continuous Hot Water – never run out of hot water, even with back-to-back showers
Reduces Energy Consumption - Automatically adjusts the amount of energy required to heat the water you need
Computerized safety features, No pilot light to have to worry about
Endless hot water, On-demand usage, Compact, Space saving, Energy conservation
Satisfies the 2012 SCAQMD Rule 1146.2 for Ultra-Low NOx Emissions

Space Savings - Compact, space-saving design. Perfect for a tank replacement.
Water & Gas Leak Detection will shut down unit and provide an error code
Hot water without the wait - or the waste
Low operating cost - High energy efficiency and water savings setting
For use outdoors with freeze protection up to -30 degrees
What Does Our Expert Advice You To Consider For Selecting high efficiency hot water heater?
high efficiency hot water heater is chosen based on a number of parameters. Depending on the product category, the learning process differs. And so, we're here to consult, guide, and address your product-related problems.
Please keep in mind the following points before selecting high efficiency hot water heater:
Gas Or Electric
Digital Displays
Venting Needs
Space
Brass Vs. Plastic Drain Valves
Anti-Scale Devices
Tankless Or Tank
Tank Capacity
Efficiency Rating
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.
FAQs
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 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.
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.
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.
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.
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 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 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.
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 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.
Because we are product consulting professionals with much expertise, we believe the data is credible. Aside from that, the high efficiency hot water heater data is kept up to date, and you may feel confident that the information is up to date and correct.
We can help you in addition to high efficiency hot water heater. If you want to support, please don't hesitate to contact us. Thanks for reading!