Best Gas Tankless Water Heater

What is the Best Gas Tankless water heater?

If you are looking for a powerful water heater you are likely to be reading this article because of gas If you are looking for a powerful water heater you are likely to be reading this article because gas tankless water heaters are more powerful in generating hot water in no time than electric water heaters. Best natural gas tankless water heater is supposed to have

  • Easy installation.
  • Low NOX emission compliance with industry standard A good venting system that will not require you to buy many extra things for Gas tankless water heater becoming workable.
  • A low BTU requirement in compare to temperature BTU ratio-guaranteeing for low energy consumption.
  • Dual-energy slots-gas/propane operated and provision for battery operation.
  • High GPM –More force in less time for multiple applications to run simultaneously.
  • A copper or stainless heating exchanger-that has higher heat convertibility and quickly warms up.
  • The best propane tankless water heater also adds extra features like –High altitude compatible, recirculation pump for instant hot water.
  • A good energy efficiency factor and industry peer’s energy certification ie Energy Star.
  • Safety lock features along with the digital display for temperature control.

I must have miss one or two points let us find them out then go through the details of some industry’s best tankless gas water heaters.

Rheem RTG-64XLN 6.4 GPM Low NOx Outdoor Tankless Natural Gas Water heater

Rheem RTG-64XLN 6.4 GPM Low NOx Outdoor Tankless Natural Gas Water heater is a mid-efficiency outdoor Gas tankless water heater. It has made its position in the league of Best tankless gas water heater through its lowest activation rate of .26gpm in the industry and All-copper heat exchanger. It is mildly efficient with 81 % EF.

It has remarkable feature of reducing your water pressure to the extent where the temperature reaches the set temperature of the heater. This will help a home to save 1100 gallon water every year. It has an easy installation feature for the DIY experts.

best gas tankless water heater

I am a fan of their display unit, apart from temperature setting this digital display shows maintenance codes. It has intelligent Self-diagnostic system that will preemptively insinuate the user via digital display about the forthcoming error. Gives you time to find the problem and solution before it finally stops working.

It has Guardian OFW™ overheat film wrap purpose of this wrap is to monitor a temperature of the heat exchanger shuts the unit down when it goes beyond a safe heat.

It is an outdoor unit with Freeze protection to -30°F, making intransigent to survive in extreme weather. It needs 11,000 – 150,000 BTU at maximum. It works for 2 showers and a faucet to run at a time with the good flow of water.

It is a medium capacity water heater it gives 6.4 GPM at 35° F rise and 5.6 GPM at 45° F rise.In case you need an industry’s best tankless gas water heaters that can also function at 8,400 ft. above sea level. Rheem RTG-64XLN 6.4 GPM Low NOx Outdoor Tankless Natural Gas Water heater is extremely environment-friendly with ultra-low NOx burner that meets SCAQMD rule of 1146.2. Also, it is certified by AHRI, CANDA CSA, USA CSA, LEED POINTS, NSF the list has many more important names.

Rinnai RL75iN Natural Gas Tankless Water Heater

Rinnai RL75iN Natural Gas Tankless Water Heater is a Gas tankless water heater for medium homes. Some call it best tankless gas water heaters for mobile homes. Because like the essential feature of best natural gas tankless water heaters; it complies with all the necessary environmental legislation. It conforms to low NOX emission levels. It is an Energy stared unit. Enhanced scale detection has made it safe and free of long-term damage. Also, the feature of Temperature lock function gives you provision to prevent your unit from unauthorized changes to water temperature which could otherwise lead to accidents.

Rinnai RL75iN Natural Gas Tankless Water Heaters

Dimensions are super convenient 14 x 9.3 x 23 inches weigh 50 pounds. It comes with a 12-Year Warranty on Heat Exchanger, 5 Year warranty on Parts, 1 Year warranty on labor in case of residential Installations. It runs on natural gas and propane. You will need a hanger to hang it outside, and necessary pipes for venting.

It has been designed in a way that you can use it for the parlor, food van, a medium office or other commercial purposes. It has a digital scale of 98°F – 140°F (37°C – 60°C) for residential purpose and 98°F – 160°F (37°C – 71°C) for Commercial usage.

Rinnai RL75iN Natural Gas Tankless Water Heater gives the maximum output of 7.5 GPM at 120 degrees. Also At 4.3 GPM, it gives rise to 70°F at 6.0 GPM it gives rise to 50° Temperature so it is ideal for moderate t cold temperature regions.

It needs .4 GPM to activate the flow sensitive ignition. If you have a big home you may consider buying more than one unit because through the journey by pipe from far end to the different bathrooms, water will hold off a bit. It is ideal for a medium home with 4 to 6 people.

Navien NPE-240-A Tankless Gas Water Heater

This one is new, Navien has many tankless units but I chose to review this as it provides some extraordinary features in a single system that can easily win the title of the best propane tankless water heater; like double heating condensing unit.



It has Dual stainless steel heat exchangers. These heat exchangers are highly resistant to corrosion and erosion. In some aspects, they are even better than the copper heat exchangers. Because of less corrosion and no mineral pile up, it gives longer life. Navien NPE-240-A Tankless Gas Water Heater has built-in recirculation system this means no more cold water sandwich problem.

Navien tankless water heater reviews

NPE models have an option of easy convertibility from NG to LP. It has a provision to convert multiple systems (up to 16 units) into one by joining them through ready link cascade system, and you won’t need another control board for controlling the temperature. It has an optional remote control the option you search for ease of use. The digital monitor on its face let you change the F to C, set temperature, displays temperature with water flow rate, shows the status of cascade operation.

If you read Navien tankless water heater reviews can know that it has a superior venting system with 2” venting option another 3” vents are usable up to 150 with standard 2 x 3” adapters. Energy conscious people would be happy to learn that it has a new metal fiber burner. This burner delivers a consistent air, gas mixture this improves combustion efficiency.

The result is ultimately less acid rain and less greenhouse effect. Apart from greenhouse effect redemption it also complies with SCAQMD strict NOx emissions standard. Because of its advanced features is comfortably usable in –homes, hotels, beauty shops, hospitals, restaurants, schools, health centers, and more. It has a small size with 13.2 x 17.3 x 27.4 inches dimension and 15 years warranty on heat exchanger, 5 years warranty on parts however due to the warranty clauses DIYers would be out of luck and the warranty will be void if not installed by professionals. In my words, this is the best tankless water heater that has all the features anyone can look for.

EZ 101 Tankless Water Heater

EZ 101 Tankless Water Heater is one of the best gas tankless water heaters on the go. You can install it for a point of useful purpose in your garden, garage, kitchen, bathroom faucet. It has an aesthetic design making it unobtrusive for your interior or exterior views. It does not have a pilot light so it will save battery life. People call it camping model, the workshop model because of its portability.

Another proof EZ 101 Tankless Water Heater is it can easily cope with rocky water flow. It is workable with 15 PSI water pressure. In case you live at high altitude or have an old or weak pumping unit with low water pressure this unit will easily blend in.

Installation is very easy and not associated with the red flag clause of without professional help the installation will void warranty clause. This low water pressure accommodating unit it has a rate water flow 1.6 gallons per minute. The unit comes with a Shower Head and a hose. It has a 20-minute safety timer, so it is ok if you forget to use it and turn off because like automatic ignition it turns off automatically thus the risk of carbon-monoxide poisoning also reduces (in case it is improperly ventilated). For colder inlet water it has a winter-summer switch and double proportional valves making the temperature range wider.

If you are buying it be sure you use it only outdoor because gas-fired EZ 101 Tankless Water Heater needs unconfined space of 2050 cubic feet as a room for combustion air. For a non-fluctuating water pressure you can depend upon pressure regulator (externally installed in supply line) thus a stable water flow irrespective how rocky the supply line is will be guaranteed.

In case you are wondering what EZ stands for than manufacturer spells it as – it easy to use, easy to install, and easy on the pocket! So it an amply good value choice after all.

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