Gas Water Heater Reviews

Are you looking to replace that huge water tank in your house? If so, you will benefit from reading our gas water heater reviews. These tankless units are much more efficient and will save you money in the long run. You will save space, save money and never run out of hot water again, as these are on demand water heaters.

Natural Gas Tankless Water Heaters

Name/Image Learn MoreBrandRatingPower SourceUse TypeCapacityType
Rinnai RUC98iN Ultra Series Tankless Water Heater Review

Rinnai RUC98iN Ultra Series Tankless Water Heater Review

view pricefull review Rinnai5 Star Average Rating Natural GasIndoor9.8 GPMTankless
Takagi T-H3-DV-N Tankless Water Heater Review

Takagi T-H3-DV-N Tankless Water Heater Review

view pricefull review Takagi4 Star Average Rating Natural GasIndoor10 GPMTankless
Rheem 9.5 GPM Tankless Natural Gas Water Heater Review

Rheem 9.5 GPM Tankless Natural Gas Water Heater Review

view pricefull review Rheem4.5 Star Average Rating Natural GasIndoor9.5 GPMTankless
Rheem 8.4 GPM Low NOx Tankless Water Heater Review

Rheem 8.4 GPM Low NOx Tankless Water Heater Review

view pricefull review Rheem4 Star Average Rating Natural GasIndoor8.4 GPMTankless

Rinnai RUC98iN Ultra Series Gas Tankless Water Heater

Rinnai RUC98iN Ultra Series Natural Gas Tankless Water Heater, Concentric/Twin Pipe Installation

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If you are looking for the best of the best in natural gas tankless water heaters, then the Rinnai RUC98iN Ultra Series is the perfect unit for you. Backed by one of the biggest names in tankless water heaters, coupled with a massive 9.8 GPM flow rate and an industry leading warranty, you absolutely cannot go wrong with this tankless water heater. With this flow rate, you will be able to simultaneously heat two showers and an appliance like a washing machine or a dish washer; in other words, you can heat an entire large home with this single water heater.

Pros

  • One of the most trusted names in tankless water heaters
  • One of the highest GPM flow rates available on the market
  • 10  Year manufacturers warranty on heat exchanger
  • Very quiet unit
  • Higher efficiency with dual pipe / condensing

Cons

  • One of the more expensive units you can find
  • Large unit that will take up space
  • Requires professional installation due to natural gas hook up
  • Might be more GPM than is required for a small home

If you are looking for nothing but the best when it comes to a natural gas tankless hot water heater, then the safe bet is on this Rinnai Ultra Series model.

Rheem 9.5 GPM Indoor Tankless Natural Gas Water Heater

Rheem RTGH-95DVLN 9.5 GPM Indoor Direct Vent Tankless Natural Gas Water Heater

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If you are looking for a best in class flow rate but not looking to pay top dollar, then the Rheem 9.5 GPM Indoor Tankless Natural Gas Water Heater might be the right unit for you. Also backed by one of the leading names in tankless water heaters, this Rheem unit is capable of delivering 9.5 GPM flow rate, which is in line with the best water heaters in the market. With a standard 10 year warranty, a trusted name and backed by hundreds of positive reviews, you cannot go wrong with Rheem’s top of the line model, the 9.5 GPM unit.

Pros

  • One of the most trusted names in tankless water heaters
  • One of the highest GPM flow rates available on the market
  • 10  Year manufacturers warranty on heat exchanger
  • Very quiet unit
  • Higher efficiency with dual pipe / condensing

Cons

  • Large unit that will take up space
  • Requires professional installation due to natural gas hook up

If you want a great unit but don’t want to spend the maximum amount, take a look at the Rheem 9.5 GPM Indoor Tankless Natural Gas Water Heater

Takagi T-H3-DV-N Condensing High Efficiency Natural Gas Tankless Water Heater

Takagi T-H3-DV-N Condensing High Efficiency Natural Gas Indoor Tankless Water Heater, 10-Gallon Per Minute

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If you are looking for the biggest bang for your buck, in terms of GPM flow rate, then look no further than the Takagi T-H3-DV-N Natural Gas Tankless Water Heater. With the absolute highest GPM flow rate available today — a whopping 10 GPM — there is almost no home too large for this single unit. Takagi is a well-known name in the industry, but not as trusted as a Rinnai or Rheem. That said, this unit has hundreds of positive reviews, a solid warranty and enough power to beat down the industry leaders, you would be wise to take a deeper look into this Takagi Tankless Water Heater.

Pros

  • The absolute highest flow rate you will find from a single unit
  • Dual pipe / high efficiency unit
  • Fantastic value, low price for high GPM flow rate
  • Industry Standard 10 year warranty

Cons

  • Quite a large unit
  • Noisy compared to the Rinnai and Rheem models
  • Name isn’t as trusted and may not be recommended by your local plumbing professional
  • Overkill in GPM for most homes

If power is what you seek, and budget is limited, then this Takagi Condensing High Efficiency Natural Gas Tankless Water Heater is the right choice for you.

Rheem 8.4 GPM Low NOx Direct Vent Tankless Natural Gas Water Heater

Rheem RTG-84DVLN 8.4 GPM Low NOx Direct Vent Tankless Natural Gas Water Heater

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Last but not least, we have the industry standard in natural gas tankless water heaters, the Rheem 8.4 GPM Low NOx Direct Vent Tankless Natural Gas Water Heater. This unit, while smaller in terms of flow rate compared to the others on our list, is a more realistic flow rate for the standard North American’s home. For some context, 8.4 GPM is capable of heating two showers at once, or a shower, a sink and a dishwasher simultaneously, which is quite reasonable for most people. While you may have to limit your water usage to two faucets at once, we think the majority of homes will do just fine with this unit, and can save a lot by doing so.

Pros

  • Great Value from a trusted Brand
  • Industry Standard 10 year warranty
  • Very Silent Unit
  • Does not require venting

Cons

  • Slightly less efficient than dual pipe counter part
  • May not be powerful enough for houses with cold incoming water (50F or below)

Overall, we think the majority of plumbing professionals will agree than this Rheem unit is the right fit for the average home who have average hot water heating needs, and are able to do without providing hot water to 3 large outputs at once.