Best Tankless Water Heater for Your Home

woman having a shower using the best tankless water heater

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Most Americans are fine when it comes to the traditional tank water heaters. I mean, it gets the job done of providing hot water on demand.

Stiebel Eltron Tankless Heater – Tempra 36 Plus – Electric, On...

image via Amazon

However, many home owners are surprised that there’s actually an alternative to the traditional tank water heaters. One that is more energy efficient and will help them save hundreds of dollars every year.

We are, of course, talking about tankless water heaters.

According to the Department of Energy, the best tankless water heater can provide 27%–50% of energy savings and can help a typical family save $100 or more per year. True enough, switching from a traditional hot water tank to a tankless water heater is one of the best ways to save money from your utility bills.

For this post, we shortlisted some of the best tankless heaters that you can buy from the market.

How We Choose Our Ratings

EcoSmart ECO 27 Electric Tankless Water Heater, 27 KW at 240 Volts,...

image via Amazon

We pride ourselves as the authority when it comes to heating and cooling solutions. Thus, we are committed to helping our readers make the best purchase decisions. The online marketplace offers a plethora of choices when it comes to heating and cooling products. So, we understand that it can be downright overwhelming to wade through such vast options.

When recommending the best products to our users, we always try to be informative, accurate, and above all, honest. So, we exhaustively research and test our recommended products to ensure that we can come up with a finely curated list that will help readers avoid the dreaded buyer’s remorse.

While on the process of making this list, we considered several key factors like quality, performance, features, and price. Thus, you can trust that it’s hard to go wrong with any of these recommendations.

Let’s jump right to it!

TOP 7 Best Tankless Water Heater

EcoSmart ECO 27 Electric Tankless Water Heater, 27 KW at 240 Volts,...
  • Savings of up to 50% on water heating costs. Dimensions :17H x 17W x 3.625D inches ;Pipes fittings :3/4 inch NPT
  • Digital temperature control in 1-degree increments allows control of hot water; Activation Flow: 0.3 GPM
  • Copper and stainless components designed for efficiency, durability and easy replacement.



​13.75 lbs


​3.62 x 17 x 17 inches



Temp. Range

80°F – 140°F

Max Amperage


Key Features

Key Features

​Digital temperature control, Copper and stainless components, Compact size, Save up to 50% in water heating costs, Limited lifetime warranty

The EcoSmart ECO 27 Electric Tankless Water Heater is a definite bang for the buck as it can help you save up to 50% in water heating costs.

This tankless heater features a flowrate of 3GPM but can jump up to 6GPM when the weather is warmer. So, you can have hot water on demand even if you run two showers simultaneously. The copper and stainless-steel components ensure that the heater is efficient, durable, and can be easily replaced.

The compact size and lightweight design mean that the EcoSmart ECO 27 will not be taking any significant space. It also doesn’t hurt that it features a rather sleek appearance so it’s not a bad thing at all if you can’t conceal the whole thing. Try doing that with a traditional tank heater.

This is a true, self-modulating unit that will surely help you save on utility bills.

Stiebel Eltron Tankless Heater – Tempra 36 Plus – Electric, On...
  • On-demand, continuous and unlimited supply of hot water
  • Sleek design saves space and no venting required
  • Electronic switch activated for virtually silent operation. Phase- single 60 Hz. Voltage- 208 V. Wattage- 27 kW



​19 lbs


​4.62 x 16.62 x 14.5 inches



Temp. Range

​86°F - 140°F

Max Amperage


​Key Features

​Sleek design, Virtually silent operation, Copper sheathed heating element housed in a copper cylinder, 7 Years leakage and 3 years parts complete warranty

The Stiebel Eltron Tempra Plus Tankless Electric Water Heater is an excellent unit if you’re looking for something a bit more powerful.

The Tempra Plus is widely recognized as the best tankless water heater and for good reasons. It features a flowrate of 4GPM with the ability to raise the temperature 50F. This is a beast of a water heater but still manages to be quite affordable.

The Tempra Plus has a feature called advanced flow control that allows you to limit the amount of flow. So you can simply set the limit when the heater is not used that often, resulting in even more savings. Think of this feature like an Eco Mode for your heater.

The compact design and decent weight make this unit a breeze to install. Once it’s set up, it runs 100% silent with no mechanical switches. If you don’t mind spending the extra bucks for a very powerful heater, look no further.

Rheem RTEX-18 18kW 240V Electric Tankless Water Heater, small, Gray
  • External digital thermostatic control with LED display (+/1 degree accuracy)
  • Most advanced self-modulation, adjust power to meet hot water demand
  • Durable Copper immersion two heating elements, field Serviceable. Flow Rate- up to 4.4 GPM



​8.5 lbs


​4 x 15 x 19 inches



Temp. Range


Max Amperage


​Key Features

​Instant, continuous hot water, Electronic temperature control, Easy to maintain, Easy installation, Advanced self-modulation

Rheem is another industry leader when it comes to water heaters. The Rheem RTEX-18 Tankless Water Heater is a testament to the brand’s commitment to quality and reliability.

The company claims that this unit is capable of 4.4 GPM of hot water flow but in many real world tests with cold incoming water, it’s fair to expect a performance of 3.0 – 3.5 GPM. That in itself is a solid performance and is more than enough to supply hot water to any room of the house with 2 showers and 2 faucets.

The unit is a self-modulated one which means that it only heats up water when needed, adding more to your savings. Speaking of savings, this heater will help you save up to 50% when compared to a traditional tank water heater. The unit itself looks sleek with the digital temperature display.



​6.75 lbs


14.3 x 12.8 x 4.4 inches



Temp. Range


Max Amperage


​Key Features

​Superior Heating Efficiency, No Venting Required, No Maintenance required, No Corrosion, No Calcium Deposits, Quick & Easy Installation

The Sio Green IR260 POU Electric Tankless Water Heater is for home owners who want more than just a water heater.

The main selling point of this water heater is that it also keeps your water clean. If you are living in an area with particularly hard water, this innovative heater might just be your best choice. The heater is made up of non-metallic and recyclable materials which means that limescale and calcium will not build up inside the unit. This is a significant advantage since it practically makes the heater maintenance free.

The heater uses an infrared quartz element for heating which also prevents that metallic takes that are common with most steel and copper heaters. This can only translate to purer tasting water which is good if you’re particularly sensitive to the metallic taste. The infrared quartz element also helps in preventing corrosion.

It’s not exactly the most powerful heater available but it serves the purpose of a cleaner water.

Takagi T-KJr2-IN-NG Indoor Tankless Water Heater, Natural Gas
  • 140,000 BTU. Voltage: AC 120V
  • 6.6 GPM max flow rate. Water connection location- bottom
  • 4-Inch category III stainless steel venting required



​37 lbs


​6.7 x 13.8 x 20.3 inches



Temp. Range


Max Amperage


​Key Features

​140,000 BTU, 6.6 GPM max flow rate, Cost-efficient and environment
friendly, Can be converted into a direct-vent unit

If you are in the market for a “middle of the road” tankless water heater, it’s hard to go wrong with Takagi T-KJr2-IN-NG Indoor Tankless Water Heater.

This tankless water heater boasts a 140,000 BTU power, making it one of the more powerful units on this list. The inlet and outlet thermistors enable the heater to get a consistent temperature at all times. This model is capable of generating a maximum of 6.6 GPM which is unbelievable for a sub water heater.

The quality of the product definitely leans on the durable side. The design itself is quite minimalistic and should easily blend with any space.

However, there’s one significant limitation to this tankless water heater, it requires a 4-Inch category III stainless steel venting. If you are not familiar with the installation process, you will end up hiring a certified professional which
drives up the price.

Despite the installation woes, this is a solid natural gas tankless water heater that offers an above-average performance.

Rinnai RUC98iN Ultra Series Indoor Natural Gas Tankless Water Heater,...
  • INDOOR installation only. Fuel Type: NATURAL GAS.
  • Concentric or PVC venting option
  • Up to 0.96 Energy Factor/Up to 0.92 Uniform Energy Factor



​82 lbs


​10 x 18.5 x 26 inches



Temp. Range

​98° F to 140° F

Max Amperage


​Key Features

​Concentric or PVC venting option, Up to 0.96 Energy Factor/Up to 0.92 Uniform Energy Factor, Space-saving design, Ultra low NOx emissions, 199,000 max BTU, 9.6 gallons per minute water flow rate

The Rinnai RUC98iN Ultra Series Natural Gas Tankless Water Heater is the Ferrari of tankless water heaters.

This Rinnai model is gas powered and it boasts the highest energy efficiency rating we have seen. It features a thermal efficiency of 95% with an Energy Star certificate thrown in. Plus, it also comes with an Energy Factor rating of up to 0.96. We’d go as far as saying that this is the best tankless water heater as far as efficiency goes.

In addition, it has a staggering max water flow rate of 9.8 GPM which just stomps the other model in this list. This also means that it’s more than capable of providing hot water to the largest of households. This is the unit to get if your home has 4 to 5 bathrooms.

With premium performance comes a premium price. This is not a cheap tankless water heater. However, the initial price is dwarfed when compared to the savings that you’ll make over the years.

Eccotemp i12-LP Water Heater, 4 GPM, Black
  • Whole home indoor, gas powered tankless water heater, rated at 4 GPM that activates only on demand and no pilot light...
  • Sleek, modern design with black tempered glass front panel featuring an easy to use LED display controls
  • Features fully automatic temperature controls with an energy saving mode and child lock technology



​29 lbs


​15 x 24 x 4 inches



Temp. Range


Max Amperage


​Key Features

​Sleek, modern design, Safe electronic ignition system, Fully automatic temperature controls, Easy to use LED display controls, Horizontal stainless steel vent kit included

The Eccotemp i12-LP Liquid Propane Indoor Tankless Water Heater is our recommendation for small homes and RVs.

One of the first things that will catch your eye is the sleek design. Seriously, it looks like a tablet with its black tempered glass front panel and the beautiful LED display. In terms of performance, the heater is rated at 3 GPM  which should be more than enough for a small home, apartment, or RV.

What I like about this model are the fully automatic temperature controls which mean a more convenient, hands-free operation. There’s also an energy saving mode to help you save more on utility expenses. There’s also a handy child lock technology in case you have some rowdy children at home.

Overall, it’s a great indoor water heater that’s attractive, easy to use, and delivers good value.

Comparison Table

Go Tankless!

That concludes our list of the top-rated tankless water heaters that you can buy.

Hopefully, this quick guide has helped you find the best tankless water heater for your home. All of these water heaters will likely provide you with great performance and value. Plus, they all have an overall positive rating on Amazon.

If you have any questions about the aforementioned products or about tankless water heaters in general, feel free to use the comment section below.

Oil Furnace Repair: When to Call a Professional

Many homes across the country rely on an oil furnace for warmth during the colder months of the year, and many also make use of an oil furnace for hot water. When your home’s oil furnace is not functioning, you may consider troubleshooting your furnace issues yourself before calling a professional to service it. There are times when basic troubleshooting can resolve your furnace issues and can help you to avoid paying money for professional repairs needlessly. However, many oil furnace issues do require the skills, tools and expertise of a professional technician.

Troubleshooting Your Furnace

One of the easiest steps you can take before calling a professional to repair your oil furnace is to simply press the “reset” button on the furnace. Every model of oil furnace will have this button, and simply pushing this button is often the only thing required to repair the issues for you. Keep in mind that you only want to push the reset button a time or two at most. This fills a chamber with fuel, and you don’t want too much fuel sitting in this chamber if it does finally ignite. You can also consider checking your circuit breaker to ensure a fuse was not tripped.

Do you really need to call an oil furnace repair professional?

Photo Courtesy of Ian Broyles via Flickr

Calling a Professional

If these basic troubleshooting steps do not resolve your oil furnace issues, you should consider calling a professional to diagnose and repair your system. The fact is that an oil furnace is a complex piece of machinery, and it does make use of highly flammable oil. Some homeowners who have attempted to make repairs to their own furnace have actually made a small problem more expensive to repair. Others have unintentionally started a fire in their home. A professional oil furnace repair technician has the knowledge, skills, parts and tools necessary to accurately diagnose your furnace issues and to safely repair those issues. Nobody wants to be without hot water in their home or a functioning furnace during the cold months of the year. After putting basic troubleshooting tips to use, consider scheduling an appointment with a professional furnace repair company today.

Standard Furnace Repair Needs

Avoid the headache; attend to standard furnace repair needs before the next cold season bites

Photo Courtesy of jronaldlee via Flickr

Common Furnace Repair and Maintenance Needs

Few things can cause a headache for a homeowner than a faulty furnace. A heating system in need of repair or maintenance can be especially troublesome if it happens in a cold part of the country in the middle of the winter. Nobody wants to think about how cold a house can get without a working furnace, but fortunately repairing and maintaining such a unit doesn’t have to be as difficult as it may seem. All it usually takes is some preventative maintenance and the ability to recognize and fix some of the more common furnace repair needs.

Preventative Maintenance

Like most complicated machinery, a furnace will remain in good working order as long as you take the time to perform regular maintenance on it. Simply scheduling a tune-up with an HVAC technician can help cut down on your energy costs by five to ten percent in addition to catching potential problems before they arise. You can also help to avoid a lot of problems simply by changing your furnace’s air filters regularly. Technicians report that as many as half of all repair calls they receive are caused by filters not being changed, so it is always best to stay on top of this.

Check the Pilot Light

Gas furnaces need to have a pilot light lit in order to work properly. If a furnace is not generating heat, it is often because the pilot light has gone out. Lighting the pilot light is usually a simple matter. Read the instructions of your furnace to learn how to do this.

Make Sure the Vents Aren’t Blocked

One of the more common problems that can befall a furnace is that it simply doesn’t generate enough heat. While this can be because the heat needs to be turned up, sometimes the problem can also be caused by vents being blocked by furniture or curtains. Make sure the vents are kept clear before you call a technician.

These are some of the more common problems that can occur with a furnace. They aren’t generally difficult to fix, but they should be considered before any more costly repair calls are made or before they become more serious problems.

Heating and Air Conditioning Systems

As long as your home stays warm in the winter months and cool in the summer months, you may not think twice about your home’s heating and air conditioning system. Many homeowners do not consider calling a heating and air conditioning company for service on a well-functioning system. It is common to simply run a system until it begins to show signs of breaking down. However, with regular maintenance on your system, you can enjoy several key benefits.

It pays to properly maintain heating and air conditioning systems to avoid malfunctions especially when you badly need them.

Photo Courtesy of Ran Yaniv Hartstein via Flickr

Improved Energy Efficiency

The various components of a heating and air conditioning system can be become dirty over time. The components can also slowly wear out and become less functional. With regular service on your system each year, the system can be restored to like-new condition. Parts that are showing signs of wear and tear can be replaced, and other components can be cleaned as necessary. Ultimately, these steps help to improve the energy efficiency of your system. This relates to cost savings for you throughout the year.

Minimized Repairs

Some homeowners may see a regular maintenance service on a heating and air conditioning system as an unnecessary cost. Why not just allow the parts to wear out and replace them then? The fact is that through regular maintenance, your system can actually require less repairs over time. A well-maintained system operates with peak performance to reduce energy consumption, and it also is one that is less likely to break down on you in the middle of the warmest or coldest months of the year. The cost of repairs can be expensive, and maintenance service can help you to avoid paying for unexpected repair work to your heating and air conditioning system.

If your home’s heating and air conditioning system has not received its annual maintenance recently, there is no better time than the present to schedule this service. Many experts recommend scheduling service to a heating system in the early fall months and service to a cooling system in the early spring months. However, this is a service that can provide you with benefits any time of the year.

Best Places to Find Furnace Parts

Many homeowners want to do what they can to minimize the costs associated with calling repair professionals to their home. When your furnace breaks, you certainly want to get your repairs done quickly. A furnace is typically the main or only source of heat for a home, and it may even provide your home with heat used for hot water as well. If you have identified the parts needed to repair your furnace, you may be able to save money by replacing those parts on your own. So where is the best place to find furnace parts?

Learn where to find the best places to find furnace parts to fix a broken furnace

Photo Courtesy of photofarmer via Flickr

Local Stores

If you are interested in repairing your furnace today, your best option for getting the parts you need is to visit a local home improvement store. Some parts may be difficult to find, so it is advisable to call a store directly before driving around town in search of a specific part. Different chains and locally owned stores will carry different parts and may charge different prices for the parts in stock. So consider shopping around to several different stores before you purchase the parts you need.

Online Shopping

There are some benefits to shopping online. For one, you can save yourself the time needed to call numerous local stores in search of your parts. You can also more easily compare prices, return policies and shipping costs by ordering online. If you do not need your parts immediately or cannot find the parts you need in local stores, consider the convenience of shopping online for your furnace parts.

Before you spend too much time searching for the parts you need to repair your furnace, you may consider researching installation instructions for those parts. The fact is that some parts require the use of highly specialized tools in order to install them properly. Some may need to be installed with precision and care to ensure the safe operation of your furnace. In some cases, it actually is more affordable to pay a professional to do the job for you. In many cases, it is faster and safer to have a skilled professional repair your furnace. While nobody wants to pay for unexpected repair work to their home, some tasks are best completed by a professional.

Solar Heating Options

You can heat your home using the heat of the sun

Photo Courtesy of Les_Stockton via Flickr

Solar Heating Options for Your Home

Most people are familiar with solar power but few have heard of solar heat. You really can heat your home using the heat of the sun, however, and more and more homeowners are doing just that. Some of the options for solar heating include solar convection heaters, greenhouses, and passive solar design.

Solar Convection Heaters

Solar convection heaters are powered by the sun itself and can be used to heat any building that gets sufficient sunlight during the winter. You can buy them ready-made or construct them yourself out of readily available materials, such as spare lumber and Plexiglas. These heaters pull air into one side, warm it gradually as it passes through a convection chamber, and then release the air into the house. A backup heater may be necessary in really cold climates on cloudy days.


An attached greenhouse is another great way to heat your home during the winter. The glass walls trap heat inside the greenhouse; it can be hot and balmy inside while there is snow on the ground. Heating your house becomes as simple as opening the doors to the greenhouse; the heat will move inside of its own accord. The house can also be heated at night using this method if the greenhouse contains sufficient thermal mass, such as tanks of water or a floor made of stone. These materials absorb heat during the day and release it slowly during the night.

Passive Solar Design

Finally, if you are about to build a new house, you can incorporate solar heating options right from the start. If you orient your house towards the south and adjust the windows and overhangs so that the winter sun will shine inside, you can easily take advantage of free heat from the sun using the greenhouse effect. The effect can be increased by using flooring materials and furnishing with a high thermal mass.

Using solar heat to warm your home in the winter is a viable option. It does not matter how old your house is or how it is designed; as long as you get enough sun during the winter, there is a solar heating option that will work for you.

Energy Efficiency Heating

For energy efficiency heating, have a pro clean the coils and replace filterOne of the greatest expenses for homeowners can be the cost of heating their home during the winter season. This why smart homeowners look for ways to get the maximum use out of their heating dollar. There are many places you can look in your home to find these savings, from the HVAC system to the house itself.


Sealing Cracks

If you are going to hold onto in the heat your money is paying for, you will have to check your home for leaks and seal them. Air infiltration can cost you a huge part of your heating dollars. Start with the attic and work your way down through the entire house.

1. Seal small cracks with caulking

2. Seal larger cracks or gaps around incoming pipes or vents with cans of expanding foam.

3. Also check the foundation seal plate for a gap and fill this with foam as well.



Aside from heat that you lose through cracks and gaps, you can also lose heat directly through the walls if you have little or no insulation.

1. Check your attic insulation and make sure it meets the Department of Energy requirements for the zone you are in. You can use either rolled or loose fill insulation.

2. Check the insulation in your walls by either removing an outlet plate or by cutting a small hole you will later cover. If you need wall insulation, a contractor can blow in loose fill or expanding foam.


HVAC Maintenance

A few simple maintenance tasks can make your heating system much more efficient.

1. Replace the filter in your central air system every month or two.

2. If you use a heat pump for heating, have a professional clean the coils on the compressor, since dirt and dust can reduce its efficiency.


Making sure your heating system is working properly makes your home more comfortable and saves you money. It even helps to protect the environment, since it means your home will have a smaller carbon footprint.

What is Central Air Conditioning? Central Air Explained

The typical residential central air conditioning system has an evaporator coil in the main duct of a forced air furnace

Photo Courtesy of Ben Cooper via Flickr

The typical residential central air conditioning system has an evaporator coil in the main duct of a forced air furnace. The furnace blows hot air throughout the home in the winter. The same blower is used to force air over the cold evaporator coils of the air conditioning system to cool the air and extract humidity in the summer.

Parts and Function of the Central AC System

The evaporator coil of the central AC unit is inside the home. These coils are cold, and warm household air flows over them to get cooled. Outside the home is the rest of the air conditioning system. It is a metal or plastic housing with a large fan and the condenser coil along with the compressor. The compressor pumps refrigerant through pipes that are sized to cycle the refrigerant back and forth between a liquid state and a gaseous state as it is passed through small and large fittings under pressure from the compressor. A copper pipe makes a circuit from the outside part of the central air unit to the inside evaporator coil and back. Refrigerant at the evaporator coil is cold. It absorbs heat in the air blowing over it, taking it outside to be dissipated by the condenser coil and fan before traveling back into the house.

Other AC Systems

Window units combine both coils into one housing that fits a window. The hot condenser coils are on the back and the cold evaporator coils are on the front. For homes without a forced air heating system that do not want window units, there are component units that connect the inside and outside parts through the wall. Inside the evaporator and blower, housing is attached to a wall with a small hole for pipes running outside to the condenser, fan and compressor.

There is a solution to fit any home with an AC unit that will keep the home cool during the hottest summers. Central air is the easiest and best answer because it can equally distribute cool air to each room that has a duct running to it.

Solving Air Conditioning Problems

Learning some air conditioning troubleshooting skills will come in handy when your HVAC acts up.

Photo Courtesy of Wootang01 via Flickr

In the heat of the summer, you will definitely want your central air conditioning system to be working properly. Aside from the fact that it will help keep you and your family comfortable, it will also save you money and even protect your health. If your air conditioning system is not cooling your home as it should, there are a number of things you can look at when trying to pin down the cause.

Ductwork Leaks

The government estimates that in the average home in the United States around 20 percent of the conditioned air being pumped through ductwork is lost because of leaks. This means that the rooms will not be as comfortable as they should, and your bills will be unnecessarily high. You (or a professional) can check for leaks all along the ductwork by holding burning incense along the connections. Any movement in the smoke indicates a leak that should be sealed with mastic.


The filters in central air conditioning systems should be replaced or cleaned, depending on the type you use, every month or two. Otherwise, the airflow through your system can be reduced.

Return Air Ducts

If you find that the upper floors are not cooling sufficiently, it may be that your return air ducts are not functioning properly. The air return ducts carry the hot air from the second floor back down so it can be cooled. Make sure that they are installed in the correct location, which is near the ceiling. Ensure that nothing is blocking them.

Compressor Maintenance

There are several things that can go wrong with the outside compressor unit that might make your system less effective. However, most of these problems are best handled by a professional. For example, dirty coils or lower refrigerant pressure could both reduce the effectiveness of your system.

Finding the reason why your central air conditioning system is not performing as well as you would like usually requires a careful examination of the entire system. However, this is often the only way to zero in on the problem or problems.