20 Best Tankless Gas Hot Water Heater [2022]

Are you looking for the best tankless gas hot water heater ? Based on expert reviews, we ranked them. We've listed our top-ranked picks, including the top-selling tankless gas hot water heater .

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# Preview Product
1 Rheem Prestige High Efficiency 9.5GPM Indoor Natural Gas Tankless Water Heater Rheem Prestige High Efficiency 9.5GPM Indoor Natural Gas Tankless Water Heater
2 Natural Gas Tankless Water Heater, FOGATTI Indoor 7.5 GPM, 170000 BTU White Instant Hot Water... Natural Gas Tankless Water Heater, FOGATTI Indoor 7.5 GPM, 170000 BTU White Instant Hot Water...
3 Rinnai RU199iN Condensing Tankless Hot Water Heater, 11 GPM, Natural Gas, Indoor Installation Rinnai RU199iN Condensing Tankless Hot Water Heater, 11 GPM, Natural Gas, Indoor Installation
4 Eccotemp FVI12-LP Liquid Propane Gas Tankless Water Heaters, White Eccotemp FVI12-LP Liquid Propane Gas Tankless Water Heaters, White
5 Rinnai V75iN Non-Condensing Natural Gas Tankless Water Heater, Indoor Installation, Up to 7.5 GPM Rinnai V75iN Non-Condensing Natural Gas Tankless Water Heater, Indoor Installation, Up to 7.5 GPM
6 Tankless Water Heater, 3.17 GPM Instant Hot Natural Gas Water Heater with Constant Temperature,... Tankless Water Heater, 3.17 GPM Instant Hot Natural Gas Water Heater with Constant Temperature,...
7 Takagi T-H3-DV-N Condensing High Efficiency Natural Gas Indoor Tankless Water Heater, 10-Gallon Per... Takagi T-H3-DV-N Condensing High Efficiency Natural Gas Indoor Tankless Water Heater, 10-Gallon...
8 Rheem Prestige Condensing Tankless Outdoor Natural Gas Water Heater 9.5 GPM - RTGH-95XLN-2 Rheem Prestige Condensing Tankless Outdoor Natural Gas Water Heater 9.5 GPM - RTGH-95XLN-2
9 MAREY GA24CSANG 8.34GPM, High Efficienty, CSA Certified, Residential Multiple Points of Use Natural... MAREY GA24CSANG 8.34GPM, High Efficienty, CSA Certified, Residential Multiple Points of Use...
10 RHEEM RTGH-84DVLN-2 Natural Gas Condensing Tankless Water Heater, Silver , Gray RHEEM RTGH-84DVLN-2 Natural Gas Condensing Tankless Water Heater, Silver , Gray
11 Rheem Prestige Condensing Tankless Indoor Natural Gas Water Heater 6.8 GPM - RTGH-68VLN-2 Rheem Prestige Condensing Tankless Indoor Natural Gas Water Heater 6.8 GPM - RTGH-68VLN-2
12 Marey GA5PORT Portable Propane Gas Tankless Water Heater, Small, White Marey GA5PORT Portable Propane Gas Tankless Water Heater, Small, White
13 Rinnai RL75iP Propane Gas Tankless Hot Water Heater, 7.5 GPM Rinnai RL75iP Propane Gas Tankless Hot Water Heater, 7.5 GPM
14 Rheem Mid-Efficiency 7.0GPM Outdoor Natural Gas Tankless Water Heater Rheem Mid-Efficiency 7.0GPM Outdoor Natural Gas Tankless Water Heater
15 Rheem Prestige Condensing Tankless Indoor Liquid Propane Water Heater with Built in Recirculation... Rheem Prestige Condensing Tankless Indoor Liquid Propane Water Heater with Built in Recirculation...
16 Rheem Prestige Condensing Tankless Gas Indoor Natural Gas Water Heater With Built-in Recirculation... Rheem Prestige Condensing Tankless Gas Indoor Natural Gas Water Heater With Built-in...
17 Rheem RTG-84XLN Water TANKLESS Heater, Gray Rheem RTG-84XLN Water TANKLESS Heater, Gray
18 Rinnai CU199eN Natural Gas Condensing Tankless Hot Water Heater, 11 GPM Rinnai CU199eN Natural Gas Condensing Tankless Hot Water Heater, 11 GPM
19 Rheem Prestige Condensing Tankless Outdoor Natural Gas Water Heater 8.4 GPM - RTGH-84XLN-2 Rheem Prestige Condensing Tankless Outdoor Natural Gas Water Heater 8.4 GPM - RTGH-84XLN-2
20 Tankless Natural Gas Water Heater, Camplux 6.86 GPM Gas Tankless Water Heater, On Demand Water... Tankless Natural Gas Water Heater, Camplux 6.86 GPM Gas Tankless Water Heater, On Demand Water...
SaleBestseller No. 1
Rheem Prestige High Efficiency 9.5GPM Indoor Natural Gas Tankless Water Heater
  • Hot water without the wait - or the waste
  • Low operating cost - High energy efficiency and water savings setting
  • Space Savings - Compact, space-saving design. Perfect for a tank replacement.
  • Water & Gas Leak Detection will shut down unit and provide an error code
  • For use indoor only
Bestseller No. 2
Natural Gas Tankless Water Heater, FOGATTI Indoor 7.5 GPM, 170000 BTU White Instant Hot Water...
  • We recommend that all installations of units must be done in accordance with the local building and plumbing codes of the installation location and...
  • The tankless design means you don't have to wait 30 minutes for preheating and unlimited use of hot water.
  • 170,000 BTU high heating capacity and maximum 7.5 GPM. It is suitable for 3-4 outlet points, which can satisfy whole family. UEF over 0.82, the high...
  • Excellent quality CSA certified in the United States and Canada. Adopting the world's most advanced technology, superior safety and durability.
  • Using built in forced exhaust fan at the bottom ensures stable combustion and eliminates the influence of external wind. Compact design for easy...
Bestseller No. 3
Rinnai RU199iN Condensing Tankless Hot Water Heater, 11 GPM, Natural Gas, Indoor Installation
  • 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
  • Instant Heating: Equipped with Circ-Logic - Pair with an external pump to reduce wait time for hot water via scheduled or on-demand recirculation
  • Guaranteed to Last: 15-, 5-, and 1-year residential for heat exchanger, labor, and parts, respectively. Wifi monitoring.
SaleBestseller No. 4
Eccotemp FVI12-LP Liquid Propane Gas Tankless Water Heaters, White
  • Whole home indoor, gas powered tankless water heater, rated at 3.6 GPM that activates only when in use, making it an energy saver.
  • For indoor installation with safe, efficient power ventilation and perfect for any small home, cabin or apartment.
  • Easy to read digital temperature display, on a compact and space-saving design with minimal noise output.
  • Safe electronic ignition system; plugs into standard 120v electrical outlet with UL-listed cord.
  • Uses standard 1/2" NPT water fittings and is equipped with easy to use manual water temperature controls.Minimum 0.65 GPM flow rate
SaleBestseller No. 5
Rinnai V75iN Non-Condensing Natural Gas Tankless Water Heater, Indoor Installation, Up to 7.5 GPM
  • Original Design: Tankless hot water heater only heats when necessary to conserve energy; For the latest in non-condensing technology and a cleaner...
  • 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...
  • Smart, Durable Design: Enhanced scale detection helps prevent serious, long-term damage to unit; Includes 15-, 5-, and 1-year residential guarantee...
  • Professional Installation Recommended: Visit the Find a Rinnai PRO page on our website to locate a qualified technician in your area to install your...
  • Find Your Rinnai: See our product guides, manuals, energy guide, warranty information, videos, and tables to find the right tankless water heater for...
Bestseller No. 6
Tankless Water Heater, 3.17 GPM Instant Hot Natural Gas Water Heater with Constant Temperature,...
  • Note: Please download and read the installation manual and product manual carefully when purchasing the product to ensure that your installation...
  • 【Tankless Instant Hot Water Heater】No need to preheat before using the tankless water heater. As soon as you turn on the tap, the water flows...
  • 【High Sensitive Touch Led Display】Comes with smart digital LED display high-definition large screen, freely adjustable the temperature between...
  • 【Multiple Security Protection】The natural gas water heater is upgraded with 12 protection methods to ensure your safety. Such as dry burning...
  • 【Energy and Money Saving】The hot water heater adjusts power input based on flow rate and temp setting in real time. Summer/winter 2 modes to save...
Bestseller No. 7
Takagi T-H3-DV-N Condensing High Efficiency Natural Gas Indoor Tankless Water Heater, 10-Gallon Per...
  • Endless hot water, On-demand usage, Compact, Space saving, Energy conservation
  • Computerized safety features, No pilot light to have to worry about
  • Safety features include freeze, overheat, surge protection, and troubleshooting diagnostic codes
  • Satisfies the 2012 SCAQMD Rule 1146.2 for Ultra-Low NOx Emissions
  • Primary heat exchanger utilizes commercial-grade copper alloy for 25 times better heat transfer than stainless steel, Integrated controls and power...
SaleBestseller No. 8
Rheem Prestige Condensing Tankless Outdoor Natural Gas Water Heater 9.5 GPM - RTGH-95XLN-2
  • Hot water without the wait - or the waste
  • Low operating cost - High energy efficiency and water savings setting
  • Space Savings - Compact, space-saving design. Perfect for a tank replacement.
  • Water & Gas Leak Detection will shut down unit and provide an error code
  • For use outdoors with freeze protection up to -30 degrees
SaleBestseller No. 9
MAREY GA24CSANG 8.34GPM, High Efficienty, CSA Certified, Residential Multiple Points of Use Natural...
  • CSA Certified
  • LED Touch Screen Computerized Safety
  • Flow activation
  • Oxygen free copper heat exchanger
  • Stainless Steel Venting Exhaust
Bestseller No. 10
RHEEM RTGH-84DVLN-2 Natural Gas Condensing Tankless Water Heater, Silver , Gray
  • Hot water without the wait - or the waste
  • Low operating cost - High energy efficiency and water savings setting
  • Space Savings - Compact, space-saving design. Perfect for a tank replacement.
  • Water & Gas Leak Detection will shut down unit and provide an error code
Bestseller No. 11
Rheem Prestige Condensing Tankless Indoor Natural Gas Water Heater 6.8 GPM - RTGH-68VLN-2
  • Hot water without the wait - or the waste
  • Low operating cost - High energy efficiency and water savings setting
  • Space Savings - Compact, space-saving design. Perfect for a tank replacement.
  • Water & Gas Leak Detection will shut down unit and provide an error code
  • For Indoor use only
Bestseller No. 12
Marey GA5PORT Portable Propane Gas Tankless Water Heater, Small, White
  • Naturally vented outdoors: you don't need to buy a extra venting
  • Serves to a variety of applications, since washing your car, windows cleaning, wash your horse or your dog and take a hot shower
  • Perfect for campsites, cabins, remote areas or just around the house. BTU/h - 35000 BTU/h. Fuel Type - LPG(liquid propane gas). pipe fittings - 1/2...
  • Provide endless hot water on demand only as needed
  • No electrical connection is required
SaleBestseller No. 13
Rinnai RL75iP Propane Gas Tankless Hot Water Heater, 7.5 GPM
  • Original Design: Tankless hot water heater's Circ-Logic technology offers recirculation patterns that match your habits; For the latest in...
  • 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...
  • Smart, Durable Design: Includes 12-, 5-, and 1-year residential guarantee and 5-, 5-, and 1-year commercial factory warranty for heat exchanger,...
  • Professional Installation Recommended: Visit the Find a Rinnai PRO page on our website to locate a qualified technician in your area to install your...
  • Find Your Rinnai: See our product guides, manuals, energy guide, warranty information, videos, and tables to find the right tankless water heater for...
Bestseller No. 14
Rheem Mid-Efficiency 7.0GPM Outdoor Natural Gas Tankless Water Heater
  • Continuous Hot Water – never run out of hot water, even with back-to-back showers
  • Tankless Gas Water Heaters are cost saving and energy efficient
  • Reduces Energy Consumption - Automatically adjusts the amount of energy required to heat the water you need
  • Easy, Convenient Control –Easily adjust water temperature ranging from 85˚F–140˚F
  • For use outdoors with freeze protection up to -30 degrees
Bestseller No. 15
Rheem Prestige Condensing Tankless Indoor Liquid Propane Water Heater with Built in Recirculation...
  • Hot water without the wait - or the waste
  • Low operating cost - High energy efficiency and water savings setting
  • Space Savings - Compact, space-saving design. Perfect for a tank replacement.
  • Water & Gas Leak Detection will shut down unit and provide an error code
  • Auto-Learn Programming - tracks water usage over a period of time and auto-programs to meet hot water needs at peak times
Bestseller No. 16
Rheem Prestige Condensing Tankless Gas Indoor Natural Gas Water Heater With Built-in Recirculation...
  • Hot water without the wait - or the waste
  • Low operating cost - High energy efficiency and water savings setting
  • Space Savings - Compact, space-saving design. Perfect for a tank replacement.
  • Water & Gas Leak Detection will shut down unit and provide an error code
  • Auto-Learn Programming - tracks water usage over a period of time and auto-programs to meet hot water needs at peak times
Bestseller No. 17
Rheem RTG-84XLN Water TANKLESS Heater, Gray
  • Natural Gas Tankless Water Heater
  • Outdoor
  • 8.4 gal/min. at 35-Degree Rise
  • UMC-117 remote control and 10-Feet of thermostat wire is included
  • Low Nox Version
Bestseller No. 18
Rinnai CU199eN Natural Gas Condensing Tankless Hot Water Heater, 11 GPM
  • Energy and Space Efficient: Space-saving design conserves energy as it heats only when necessary; multiple venting options offer installation...
  • Optimal Water Pressure: High-performance 11 GPM hot water flow rate for a powerful, constant stream
  • Instant Heating: Circ-Logic technology enables recirculation patterns that coincide with your typical habits; Wi-Fi monitoring creates hot water on...
  • Guaranteed to Last: 8-, 5-, and 1-year commercial warranty for heat exchanger, parts, and labor, respectively
Bestseller No. 19
Rheem Prestige Condensing Tankless Outdoor Natural Gas Water Heater 8.4 GPM - RTGH-84XLN-2
  • Hot water without the wait - or the waste
  • Low operating cost - High energy efficiency and water savings setting
  • Space Savings - Compact, space-saving design. Perfect for a tank replacement.
  • Water & Gas Leak Detection will shut down unit and provide an error code
  • For use outdoors with freeze protection up to -30 degrees
Bestseller No. 20
Tankless Natural Gas Water Heater, Camplux 6.86 GPM Gas Tankless Water Heater, On Demand Water...
  • 6.86 GPM Instant Constant Hot Water- Camplux 26 litre tankless water heater is powered by 120 VAC voltage, features imported PCB with precise...
  • Convenient, Easy Installation-6.86 GPM hot water is activated by water flow rather than water pressure,automatically activates on water pressure...
  • S/S Burner, Thermal Efficiency Up to 89.98%-The tankless gas water heater comes with CSA certified balanced combustion design, v-type stainless steel...
  • Direct-Current Frequency Conversion Fan-The gas water heater comes with a direct-current frequency conversion fan. The water heater can resist level 8...
  • Considerate Anti-Scalding Protection-The tankless water heater equipped with anti-scalding function to avoid the problem of excessively high setting...

Having trouble finding a great tankless gas hot water heater ?

This problem is well understood by us because we have gone through the entire tankless gas hot water heater research process ourselves, which is why we have put together a comprehensive list of the best tankless gas hot water heater s available in the market today.

After hours of searching and using all the models on the market, we have found the best tankless gas hot water heater for 2022. See our ranking below!

How Do You Buy The Best Tankless Gas Hot Water Heater ?

Do you get stressed out thinking about shopping for a great tankless gas hot water heater ? Do doubts keep creeping into your mind?

We understand, because we’ve already gone through the whole process of researching tankless gas hot water heater , which is why we have assembled a comprehensive list of the greatest tankless gas hot water heater available in the current market. We’ve also come up with a list of questions that you probably have yourself.

John Harvards has done the best we can with our thoughts and recommendations, but it’s still crucial that you do thorough research on your own for tankless gas hot water heater that you consider buying. Your questions might include the following:

  • Is it worth buying an tankless gas hot water heater ?
  • What benefits are there with buying an tankless gas hot water heater ?
  • What factors deserve consideration when shopping for an effective tankless gas hot water heater ?
  • Why is it crucial to invest in any tankless gas hot water heater , much less the best one?
  • Which tankless gas hot water heater are good in the current market?
  • Where can you find information like this about tankless gas hot water heater ?

We’re convinced that you likely have far more questions than just these regarding tankless gas hot water heater , and the only real way to satisfy your need for knowledge is to get information from as many reputable online sources as you possibly can.

Potential sources can include buying guides for tankless gas hot water heater , rating websites, word-of-mouth testimonials, online forums, and product reviews. Thorough and mindful research is crucial to making sure you get your hands on the best-possible tankless gas hot water heater . Make sure that you are only using trustworthy and credible websites and sources.

John Harvards provides an tankless gas hot water heater buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information.

How did we create this buying guide? We did it using a custom-created selection of algorithms that lets us manifest a top-10 list of the best available tankless gas hot water heater currently available on the market.

This technology we use to assemble our list depends on a variety of factors, including but not limited to the following:

  1. Brand Value: Every brand of tankless gas hot water heater has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
  2. Features: What bells and whistles matter for an tankless gas hot water heater ?
  3. Specifications: How powerful they are can be measured.
  4. Product Value: This simply is how much bang for the buck you get from your tankless gas hot water heater .
  5. Customer Ratings: Number ratings grade tankless gas hot water heater objectively.
  6. Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their tankless gas hot water heater .
  7. Product Quality: You don’t always get what you pay for with an tankless gas hot water heater , sometimes less, and sometimes more.
  8. Product Reliability: How sturdy and durable an tankless gas hot water heater is should be an indication of how long it will work out for you.

John Harvards always remembers that maintaining tankless gas hot water heater information to stay current is a top priority, which is why we are constantly updating our websites. Learn more about us using online sources.

If you think that anything we present here regarding tankless gas hot water heater is irrelevant, incorrect, misleading, or erroneous, then please let us know promptly!

FAQ:

Q: What is the best brand of hot water heaters?

A: American Standard – Produces residential and commercial water heaters. American Water Heaters – Sub-brand of AO Smith sells many residential and commercial models. … Bosch – Electric,gas and solar waters heaters,as well as mini-tank systems. Navien – Specializes in tankless water heaters and boilers. …

Q: What is the best hot water heater?

A: Largest Water Heater Manufacturers. By market share,the water heater industry is dominated by a handful of brands. … Top Rated Water Heater Manufacturers. Consumer Reports offers a slightly altered list of top rated manufacturers based on sales,performance and variety. Tips for Buying Efficiently. … Performance vs. …

Q: How many BTUs does a tankless water heater use?

A: Whereas the industry standard water heater tank uses 36,000 BTU, the average tankless water heater requires anywhere from 150,000 to 200,000 BTU. The reason is that tankless water heaters need to get the water up to temperature almost instantaneously. To do that, it requires a very high volume of gas.

Q: What is the downside of a tankless water heater?

A: However, the downside of a tankless water heater is that it has a higher upfront cost, uses an immense amount of energy, and doesn’t provide water at all in case of a power outage.

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