The Most Efficient Hot Water Heating System For 2023
By, Holly BeckerUpdated
Summary
1. Best Overall: EcoSmart ECO 18 Electric Tankless Water Heater
The EcoSmart ECO Series Electric Tankless Water Heater is a highly efficient and stylish option for heating water in your home. With up to 70% lower energy consumption compared to tank-type water heaters and a lifetime warranty, the EcoSmart ECO Series is an economical choice for every household. Read Review
2. Runner Up: Rinnai V75iP Non-Condensing Propane Tankless Water Heater
From the design to the professional installation and materials, Rinnai is a company of professionals. With this in mind, we have created our perfect product for you. The water heater with its original design will never run out of hot water and offers a sleek, durable design that will last for years. More importantly, it can be installed both inside and outside your home without any issues. Read Review
3. Best Eco Friendly: Stiebel Eltron Tankless Water Heater
The Stiebel Eltron Tankless Water Heater is designed to work with low water pressure, which means it can be used in any home or office. The tankless water heater is also a space-saving alternative to large stand-alone models. With tankless technology, there is no need for a storage tank for water and, as a result, no need for a replacement unit. This model also includes electronic switch activation, so the hot water heater activates automatically when called upon. Read Review
4. Best Convenient: Bosch Electric Mini-Tank Water Heater
Bosch Electric Mini-Tank Water Heaters provide hot water from a reliable source. These compact and easily installed units are easy to install and can be mounted on the wall or vertically or horizontally. This handy water heater has its own thermostat so no need for an external one. Read Review
5. Easiest To Install: CAMPLUX ENJOY OUTDOOR LIFE Tankless Water Heaters Outdoor
Whether you're in the market for a new home or office, or just want to enjoy an outdoor shower after a hard day at work, Tankless Water Heaters Outdoor is a perfect choice. Not only are these units safe to handle and easy to install, but they feature a lightweight, compact and portable design that is versatile for various applications. Read Review
The efficiency of your hot water heating system is essential to saving money and reducing greenhouse gas emissions. The more efficient your system, the less energy it will require and the lower your monthly utility bill will be. Depending on your home and the size of your family, you might only need a minor upgrade in order to have the most efficient hot water heating system possible.
In this article, we’ll give you an overview of what type of system is easiest to upgrade and how much you can expect to save. The best way to determine which type of system works best for you is by asking yourself a few questions: Do I plan on moving in the future? How warm do I need my water? Do I have access to natural sunlight? These questions will help you determine if installing a tankless or a traditional central boiler is right for you.
After spending 21 hours researching and assessing, We have identified the most efficient hot water heating system is EcoSmart ECO 18 Electric Tankless Water Heater. We've put up a buying guide as well as additional good alternatives to help you find the perfect one.
Our Top Picks
- Manufactured in China
- 75 A
- Lifetime warranty for residential use
- The product works and is compatible with 2 X 40 AMP (DP) breakers and 2 X 8 AWG wire
- Digital temperature control in 1-degree increments gives users complete control of hot water
- Save up to 60% on your water heating costs with the most advanced, self modulating technology available
- The product is highly durable
- The product is easy to use
- Save up to 12 cubic feet of storage space.
- Amperage (amps): 75. Activation flow: 0. 3 GPM. Flow Rate @ 35 F Rise (gallons/min): 3. 51 gal (US)/min
- 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
- 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 RE180iP model
- 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
- Never Run Out of Hot Water with this Compact Propane 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)
- 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)
- CONTINUOUS FLOW – Advanced Flow Control patented technology invented by Stiebel Eltron, automatically maintains water temperature for constant comfort. It’ll reduce flow slightly if hot water demand exceeds capacity. Hot showers will never be interrupted again
- SPACE & ENERGY SAVER – Its small, sleek white design saves space yet still provides endless hot water for your whole house, and no venting is required. Eco friendly unit saves energy with auto-modulation and the ability to electronically control water flow. Savings monitor even shows how much you save on energy costs
- TEMPRA 20 PLUS – This specific model is 19.2kW, 240V, requires a min recommended electric service of 125 A, and offers an output water temperature of 68° to 140°F. Check our guides below to compare features of our various Trend and Plus models, each available in different kW levels
- WARRANTIES INCLUDED – Stiebel Eltron’s top-rated electric tankless water heaters perform with the highest standards for comfort and reliability. Our 7-Year Leakage and 3-Year Parts Warranties are included with purchase
- EASY OPERATION – Electronic switch activates the hot water heater and it’s noise free while in use. Has a digital temperature display and preset temperature and memory buttons, while the interior solid copper heating system does all the power work
- 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
- 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
- RELIABLE WATER SOURCE: Easily hard-wire the 7-gallon model to provide the on-demand reliable water source your home or office needs
- 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
- Installation Instruction & Package Content: This Camplux BD158N heater comes with 1-year guarantee, 5 feet premium on/off shower head, 5 feet gas regulator, 1 set US-standard garden hose, and 1 installation hardware pack. Setting up this propane water heater simply takes 10 minutes.
- Flow Rate & Temperature Specification: The temperature raise is 114.8℉ (46℃) at its highest point and 46.4℉ (8℃) is at its lowest point of 1.58 GPM. Also, 1.58 gallons of hot water can be produced per minute at the flow rate of 1.58 GPM.
- Lightweight, Compact & Portable Design: The 14 pounds lightweight portable water heater's folding handle keeps it out of the way and enables easy setup outside.
- 6-in-1 Protection & CSA Safety Approved: This tankless water heater is CSA Approved with anti-freezing protection, over-heating protection, low water flow protection, dry combustion protection, high water pressure protection and flame failure device.
- Versatile Applications: The lowest water pressure at beginning for the water heater is 3.0 PSI. For off-grid and rural areas, this hot water generator powered by two size D batteries is ideal. No more chilly outdoor shower anymore.
- Safety Tip: To avoid gas leakage caused by improper sealing of the water heater, DO NOT TWINE TEFLON TAPE between gas regulator and gas inlet pipe. Read the directions before installation check for gas leaks at all times before operating.
- Warm Maintenance Tips: It must be properly drained if the water heater stored in cold climate, Freeze damage can occur in the heat exchanger or water valves. To drain the device properly, please open the drain stern located at the bottom right of the water heater . You can do so by turning in a counter clockwise direction. Please disconnect all incoming and outgoing water lines to ensure proper drainage from the water heater. When not in use, fully disconnect gas, incoming and outgoing waterlines. Store in a warm dray place.
- Self-modulating power control
- 24kW Model Flow Rate: up to 5.9 GPM for RTEX-24
- ON/OFF Dial Control with adjustable digital temperature display
- On demand, consistent and continuous hot water
- Bottom 3/4" NPT water connections
- 【EASY TO INSTALL & USE】 Started with 2.5 PSI low water pressure, this tankless water heater propane is good for RV camping, outdoor trip and washing pets. No electricity required, ignition of the propane water heater is with 2 pieces D cell batteries(not included). With the LED display, you can easily adjust the temperature to meet your need.
- 【100% SATISFACTION】 This on demand propane water heater is the real deal! We aim to ensure that every customer have a happy and worry-free purchase experience. If you have further query please feel free to contact us.
- 【5 SAFETY PROTECTIONS】 Designed with oxygen depletion safety shut-off protection, over-heating protection, anti- freezing protection(a drain plug to discharge residual water), flame failure device and dry combustion protection, the camping propane water heater aims to keep you and your family safe all the time.
- 【FULLY EQUIPPED】 No need to look around for accessories! This portable tankless water heater comes with a CSA gas regulator, a high pressure shower head with a 5-foot(1.5 meters) stainless steel hose, an US universal gas connector(fitted already), 2 garden hose adapters, wrenches and fitting kits.
- 【LIGHTWEIGHT & INSTANT HOT WATER】 Only weighing 9 lbs and energy-saving, this portable propane water heater is perfect companion for your journey. With maximum power output 34,000 BTU/HR, you can get 1.32 gallons endless hot water easily wherever you are. No need to preheat before operating the propane hot water heater. As soon as you turn on the tap, you will get water at the temperature you desire.
- Before purchase and installation, Please verify that this EEM24018 is the correct size for your hot water needs.Rated Pressure: 25psi minimum; 150psi maximum
- Compact size saves valuable storage space; Resistant and stylish with digital temperature control in increments of 1°F ranging from 80°F to 140°F
- Tankless water heaters provide a continuous Supply of hot water and only heats the water you need, when you need it
- The most advanced, self-modulating technology available, meaning the unit will adjust how much energy needs to be input based on how much hot water is needed
- Instant, consistent and endless hot water
- 🍏【FULLY EQUIPPED】No need to look around for accessories, this tankless water heater comes with CSA approval Gas Regulator, high pressure Shower Head with 59in(1.5m) extended Long Stainless Steel Hose and Shower Holder, Wrenches, US Universal Gas Connector(Fixed already), Garden Hose Connectors, Teflon Tape, and Fixing Kits
- 🍏【7 MORE USAGE SCENARIOS】Perfect heater shower for before and after swimming in your pool or lake. Your dog will love the spa-like experience. No more cold outdoor baths with the hose - you can use the detachable shower head to easily wash your pets with warm water they will appreciate. Perfect for Outdoor Shower, Portable Hot Water Sink, Portable Pet Shower, RV/SUV/MPV, Beach Bathing Boxes, Campsites, Hunting Cabins, Boats, Kid Pools, or just around your house
- 🍏【6-IN-1 MULTIPLE PROTECTION】Passed UL-307B Safety Test and FDA Food Contact Article Test, ensure home safety, Oxygen depletion safety shut-off protection, Over-heating protection, Anti-freezing protection, Flameout protection, Thermal protection, Strong wind protection device and it can withstand wind speeds of up to 3 meters per second outdoors.
- 🍏【LOVE ENDLESS HOT SHOWERS】Other tankless water heater on the market have limited support and poor quality. This outdoor tankless water heater is the real deal! And if you have any questions, concerns or issues, our friendly and helpful support team can be reached at phone call and mail.
- 🍏【EASY TO INSTALL LOW PRESSURE STARTUP】Just need 3.6PSI of water pressure, No electricity needed, the ignition is with 2 pieces D cell batteries(not included). Connect gas supply water supply, now you and your lovely family lovely pet can enjoy endless hot water anywhere anytime.
- [Save Money and Space] - Self-modulating technology regulating the amount of energy required to heat water only when you need it with 99.8% efficient, saving up to 60% on water heating cost comparing to traditional tank water heater. Wall mounted compact size with no water tank, convenient for any spaces, saving floor space and fitting into tight spaces.
- [Easy Installation & Safety Protection] - ETL certified with overheating protection, auto stop heating when detecting no water, quality workmanship for leakage protection
- [Instant Unlimited Hot Water] - REQUIRE 2 x Double-pole 40AMP Breakers to Achieve 240V for this On demand tankless electric water heater, providing hot water in 3 seconds when you need it and as long as you need, eliminating wait time, never run out of hot water again and No More cold shower
- NOTE - Make sure this water heater is the correct size for your hot water need: 18kW at 240V draw max 76amp; Required breaker 2 x Double-POLE 40AMP; Wire gauge 2 x 8AWG; Unit size 17.12" x 13.12" x 3.12"; Water connection 3/4" NPT. 2-year limite warranty and 24/7 customer support services.
- [Smart Operation] - Auto adjusting energy consumption basing on income water temperature and flow, ensuring maximum efficiency, continuous stable temperature and optimal power usage. Digital temperature display allowing adjustment in 1° increment from 80°F to 140°F. Heating element separated from water tube significantly reducing scale, corrosion and mineral buildup on the element, achieving better performance and low maintenance.
How Can You Choose The most efficient hot water heating system Among Numerous Products From Different Brands?
It can take you much time to research the outcome of most efficient hot water heating system. It doesn't mean you can’t get the best one for yourself. We are the experts specializing in studying market and products. We will help you with your most efficient hot water heating system issues, no matter what time it is!
Please have a closer look at the things below to evaluate and then choose the right most efficient hot water heating system for your need:
Brass Vs. Plastic Drain Valves
Digital Displays
Tankless Or Tank
Gas Or Electric
Tank Capacity
Anti-Scale Devices
Venting Needs
Space
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
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.
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 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.
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.
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.
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.
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.
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.
We suppose that these descriptions above are accurate and objective since experts give them. The most efficient hot water heating system information, in other words, is continuously updated. Thus, don’t worry about the out-of-date data. Rest assured!
If you have any questions, let inform us. We will make all our effort to solve your problems, and please feel free to do that. Thank you!
About Holly Becker
