The Best Tankless Water Heater 2018-02-16T21:34:05+00:00

What is the Best Tankless Water Heater

Welcome to Top Tankless Water Heater You are on this page because you are looking of the best tankless water heater. We have conducted extensive market research on the best tankless water heater brands and we know tankless water heaters inside and out.  We have selected the top 3 best tankless water heaters on the market and compared energy factors, pricing, quality components, performance output, simplicity and value to bring you what we believe is the best tankless gas water heater currently seen in the tankless heater market.

When you are considering a tankless water heater, there are several points that must be considered. The most important consideration is whether you decide on a gas versus electric tankless water heater. Usually, these points will come down to your individual circumstances, however, if you have the option of installing either a gas or electric tankless water heater, the advantages and disadvantages need to be weighed up. If you would like to further investigate electric tankless water heaters, click here. If you are interested in gas tankless water heaters, click here. If you would like to read our top 3 best tankless water heaters, continue reading!

The results are in….

Continue reading to discover our top 3 best tankless water heaters!

best tankless water heater

Navien NPE-240a Tankless Tankless Water Heater

Navien NPE-240a Premium Tankless Tankless Water Heater

Coming in at first place is the Navien NPE 240A. This model brings you the latest in innovative tankless water heater technology and design with cutting edge energy efficiency. The Navien Tankless Heater has developed state of the art condensing technology where more BTUs are produced resulting in higher flow rates than comparable units. One of its highlight features is the two stainless steel heat exchangers; giving you a longer life expectancy and far more durability as stainless steel is resistant to corrosion and erosion in comparison to copper heat exchangers.

The Navien Water Heater produces low NOx emissions which is considerably kinder to the environment and in compliance with SCAQMD 1146.2 – the standard put in place to reduce NOx emissions from natural gas fired water heaters. Additionally, the metal fiber burner is designed to deliver a consistent air/gas mixture to improve combustion efficiency.

The Navien tankless water heater employs superior preheating technology and intelligently recognizes hot water usage patterns to provide hot water when required. The NPE model can also be converted from natural gas to propane.

A stand-out feature of the Navien On Demand Hot Water Heater is the sophisticated Front Panel Command Center. Consisting of a user friendly interface with soft touch pad, it provides self-diagnostics allowing you to swiftly identify any problems and can display the water temperature in either °F  °C.

With an energy factor of 0.99, the NPE240a has one of the highest energy factors currently seen in the tankless heater market and the benefit to you means lower operating costs, leaving more money in your pocket.

The Navien 240A is compatible with existing 1/2 “ gas lines which are typically used for traditional water tanks, so if you are looking for an upgrade or replacement water heater option, Navien is the smart choice as installation will be quicker, easier and less trouble. Navien Inc suggest that installation times can be as quick as 4 hours. Check out the youtube clip below to view a Navien tankless water heater installation.

Navien NPE-240a Specs

Dimensions: 13.2 x 27.4 x 17.3 

Flow Rate:  up to 11.2 gpm

Min Flow Rate: 0.5 GPM

Heat Capacity: 19,900 – 199,900 BTU

Energy Factor: .99

Energy type: Propane & Natural Gas

Installation type: indoor and outdoor models available

When comparing to the other two best on demand hot water heaters the advantages are:

  • Highest energy factor in the market due to its superior condensing and recirculation technology.
  • Purchasing cost is middle range in between the Rinnai and the Rheem models featured in our best tankless water heater guide. 
  • The Navien warranty includes 15 years on the heat exchanger; Rinnai offers 12 years and Rheem provide only a 10 year warranty.
  • Both heat exchangers are stainless steel, whereas both Rheem and Rinnai have designed their units with  the primary copper heat exchanger and the secondary stainless steel heat exchanger.

Navien is the highest quality, most efficient tankless water heater that comes with a ‘middle of the range’ price tag. You will not be disappointed with the Navien NPE-240a. 

If the NPE240a is not the right fit for your needs and you would prefer a smaller output or perhaps a cheaper Navien unit, check out our Navien Tankless Water Heater Reviews for alternative options.

best tankless water heater

Rheem RTGH-95DVLN Tankless Water Heater

Rheem RTGH-95DVLN Tankless Water Heater 

The Rheem prestige series condensing tankless water heater provides continuous hot water while saving an estimated $1200 in life time energy costs and saves up to 1100 gallons of water per year due to its condensing and recirculation technology.

It features a built in condensate neutralizer chamber which directs the condensate to the built-in neutralizer chamber that eliminates acidity and can be disposed of in any household drain. The heated water is then balanced by the computer controlled water bypass valve so the outgoing hot water is the ideal temperature, creating optimal efficiency. This is evident in the achieved energy factor of .94.

The Rheem RTGH 95DVLN is compatible with ½ inch gas lines, so if you are looking for an alternative to your existing hot water system or you need to upgrade your system, the Rheem RTGH 95DVLN is a suitable fit and can be installed quicker and easier using the existing gas line. Furthermore, the Rheem tankless water heater unit can be vented with PVC, saving on installation costs. The combustion gases can exit the unit safely through the venting system which means more of the heat can be extracted through the exhaust gases allowing the water heater to be vented with PVC saving costs on components and installation.

If you live in a high-altitude area, the Rheem RTGH DVLN is high-altitude compatible, and operates effectively up to 9,840 ft. elevation above sea level. Furthermore, the tankless water unit also features freeze protection to -30°F.

In summary, Rheem offers noteworthy features such as high altitude capability and freeze protection and achieves a position in our top 3 best tankless water heaters. However, similarly with the Rinnai RUR model, it fails to achieve the benchmark set by the Navien NPE-240a in terms of quality, efficiency and warranty timeframes, and therefore comes in at the position of the second best tankless water heater (gas) on the market in 2017.

If you wish to read more Rheem tankless water heater reviews, check out our guide here.

Rinnai RUR98in Tankless Water Heater

Rinnai RUR98in Tankless Water Heater

The Rinnai RUR98in from the ultra series condensing tankless water heating units is a large unit capable of supplying up to four fixtures simultaneously.

The RUR98in features sophisticated integrated condensing and recirculation technology that delivers hot water faster to the fixtures, rapidly reducing the time spent waiting. This means less natural resources consumed, and lower utility costs associated with gas and water usage. Rinnai’s unique condensing design incorporates two heat exchangers to achieve optimum heating value. The stainless steel system recaptures residual heat from flue gases to pre-heat incoming ground water, which then circulates to the primary copper heat exchanger.The recirculation technology circulates the incoming water through the tankless water heater through the hot water supply line and back to the unit via the return line. Watch the youtube clip for an in-depth visual explanation of how this works.

The included digital controller allows you to set a recirculation program in accordance with your hot water usage patterns to ensure you are getting sufficient hot water at the fixtures during peak demand times.

Installation is quick end easy with  multiple venting options and easily adapts to the existing plumbing systems without dedicated recirculation lines.

The RUR98in features an energy factor of .95; quite impressive but fails to meet the benchmark set by Navien and their NPE-240a tankless water heater. Additionally Rinnai offer a 12 year heat exchanger warranty, 3 years less than Navien’s heat exchanger warranty.

The Rinnai RUR98in is an exceptional tankless water heater designed with sophisticated and innovative technology, produced by a quality and reliable industry-leading brand, however in comparison to the Navien NPE-240a, it does fall slightly short with a higher purchase cost, lower energy factor, lower quality (copper heat exchanger) and a shorter warranty.  Although this tankless water unit has achieved a spot in our top 3 best tankless water heaters, it unfortunately fails to meet or surpass the benchmark of the Navien NPE-240a in terms of quality, efficiency and cost and is ranked as our third best gas water heater on the market in 2017.

If you wish to read more Rinnai tankless water heater reviews, check out our guide here.

Thank you for stopping by at Top Tankless Water Heater We strive to provide the solution to your tankless water heater questions and we make our reviews as comprehensive as possible. We hope we have provided sufficient information for you to make an informed decision with regard to the best tankless water heater and we are sure that you will agree that the Navien NPE240a is the best tankless water heater on the market due to its high quality, high efficiency and low price tag (by comparison)!

If a propane tankless water heater or a natural gas tankless water heater is not possible due to the utility services available in your area, perhaps a tankless electric water heater would be a better solution and you can check out our electric tankless water heater reviews guide here.