2021 5 Best Natural Gas Tankless Water Heaters Worth the Investment

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A natural gas tankless water heater is a popular choice for many homeowners who are lucky enough to have access to a natural gas line, due to its ability to provide an endless supply of hot water. It does this without incurring any of those problematic high energy bills that are derived from those more conventional of water heaters.

Such appliances work by only heating the water inside the tanks when it is necessary to do so. This is in stark contrast to those water heaters that continuously maintain the water temperature within their storage tanks.

Therefore, the result is a decrease in the amount of energy used, and this applies even when there is a high demand for hot water.

Ideal for homes with families and therefore busy households, or even those smaller of dwellings such as apartments and places where the demand for hot water is lighter, there is a variety of sizes to suit every household type and indeed every pocket!

Furthermore, some US residents may even be eligible for government tax incentives by merely installing and operating a natural gas tankless water heater in their home. This relates to what is known as the tankless water heaters tax credit element. It refers to those Energy Star rated tankless water heaters that work to protect the environment while saving energy.

Many tankless heaters are included in this fantastic incentive alongside those renewable energy systems. If you can confirm that your model is recognizable and eligible, like the models using natural gas and propane such as those reviewed here, you may be entitled to receive a rebate on your appliance.

The water heater tax credit was introduced in the US and Canada as a government initiative with the idea of encouraging many household consumers to replace their old and low efficient models with a higher energy efficient one instead. Therefore, when you do make your choice, it’s certainly worth investigating whether you may benefit from this program and a most efficient model all-round here.

Here we’ve done some research on those best natural gas tankless water heaters. Narrowing our findings down to no less than five of the best of these products, we share with you their many features and wonderful benefits. Available from a large selection of online retailers, these products are all available at just one click of a mouse!

1. Rinnai RUC98iN Ultra Series Natural Gas Tankless Water Heater

Priced at the higher end of the market, the Rinnai RUC98iN natural gas tankless water heater is from the ultra-series and offers a condensed innovative and advanced technological tankless water heating design. Best Natural Gas Tankless Water Heater

This is ideal for those homes that have larger families or simply have a higher than average need for hot water. This is not just due to its larger size but also its ability to offer such advanced technology and produce an ultra-efficient operation, though all at a higher initial investment initially.

The idea of this model type is to offer homeowners with a supply of endless hot water, but doing so while making energy savings, producing environmental benefits and ensuring a fantastic space saving design as it does all this.

This water heater utilizes some of the more environmentally friendly of technological applications and therefore creates less C02 emissions as a result. This means not only is it a more suitable choice for the home but ultimately the better one when contributing to a healthier environment through cleaner overall air!

Working hard to deliver the home with a good supply of hot water, it does this whenever it is needed and simultaneously, therefore providing to multiple faucets as well as showers. This ability makes it the more practical of choices for those homes with much traffic running through it.

One of the easier of models to install, this stainless steel water heater can be simply fitted once taken out of the box. This is due to it now offering, even more, venting options straight from the box, making it ideal for homeowners to install themselves without outside help.

This appliance has an approved high altitude of up to 10,200 feet in total.

Furthermore, Rinnai claims to be the only manufacturer that offers both twin pipes and concentric PVC venting. Therefore, no adapter is necessary for either venting options with any installation choice as this is a one unit two venting option model.

Overall, with the easier of installation processes with this appliance is the more flexible of choice, saving you money as well as time as you can get the job done much quicker here.

Coming complete with a free hot and cold water installation value kit as standard, this water heater is small in stature, similar to a small suitcase, and therefore its space saving of designs will encourage an installation that can be undertaken almost anywhere in the home.

Regarding the warranty aspect of your Rinnai purchase here, when you select their natural gas tankless water heater, you’ll also receive a company standard 30-day money back guarantee as well as access to an effective return policy.

2. Takagi T-KJr2-IN-NG Indoor Tankless Water Heater

The Takagi natural gas tankless water heater model T-KJr2-IN-NG is one of the smallest of the Takagi units in their water heater line up. Takagi Indoor Tankless Water Heater, Natural Gas

Ideal for those light residential of uses, including smaller apartment units, as well as radiant heating applications, it may be small in build, but it is thoroughly robust in operation.

Boasting a staggering amount of gas inputs of up to 140,000 BTU per hour, it can meet and provide all the hot water needs required, especially for all small homes and apartments that have one to two bathrooms in total.

This model has a flow rate of a maximum 6.6 gallons per minute yet in operation can actually work on a par with those 40-gallon tank types of water heaters – while doing a lot more in the process!

Easily wall mounted and available to install horizontally or vertically, this is a gas-fired tankless water heater that can, in reality, cope with a capacity of one to two showers, dependent on the immediate climate.

Safety wise, its numerous features include an internal freeze protection system, a manual reset switch, and air-fuel rations sensor and a water temperature safer control element.

With the power cord included, this appliance ensures that you have an endless supply of hot water due to there being no tank to fill.

Coming complete with several accessories, with your purchase you’ll find a remote control with built-in temperature, a pipe cover, a heater recess box, a direct vent conversion kit, a back flow preventer, and an F-F Adapter isolation valve kit.

3. Rheem RTGH-95DVLN 9.5 GPM Indoor Tankless Natural Gas Water Heater

Another high priced model on the list here is the Rheem Indoor Water Tank. One of the most trusted industry brands, Rheem is also one of the more recognizable when it comes to designing and creating water heaters. Rheem RTGH-95DVLN 9.5 GPM Indoor Direct Vent Tankless Natural Gas Water Heater

All Rheem products are subject to frequent tests and therefore have certification from various Government and third-party testing labs, ensuring all their products meet rising quality standards.

This gas water heater is predominately designed for those homes that have three bathrooms; such is its extensive ability to provide a vast level of hot water.

A 94% energy efficient heater this also boasts a stainless steel condensing heat exchanger in its makeup. This is the most useful of whole home tankless water heating solutions as reheats incoming cold water and only what you need.

A more convenient of designs and indeed low-cost operation, it also features intelligent electronic controls. These are designed to increase energy efficiency and safety.

An indoor natural gas appliance with electronic ignition, this is a Lox Nox version water heater. This means that it actively works to reduce the number of emissions that it naturally releases during use. Therefore, the result is a higher standard of cleaner operating time.

An energy efficient model, as much as 94%, the stainless-steel casing around this model is also claimed to be the most energy efficient at housing the appliance as well!

Utilizing a two-pipe direct vent system, this is an industry best model that has a 0.26 gallons per minute minimum flow rate and a 0.40 gallons per minute minimum activation flow rate.

Featuring a digital remote control, there is also a total of ten feet of thermostat wire included with this purchase. What’s more, the EZ Link cable that is available will work to accompany those high demand applications. Therefore you can, if you wish, connect two tankless units together to operate as just the one.

A tremendous self-diagnostic system, this model also offers a high-altitude capability, which means it can be placed and elevated above sea level, at 9480 feet without a chip.

The concept behind the Rheem tankless water heater is to reheat incoming cold water, making it amongst one of the most efficient solutions when it comes to providing hot water to those larger of homes.

With the concept of it being pointless to keep around 40 to 50 gallons of water continually hot, even when you’ve no intention of using it, this is the model type that ensures it isn’t an expensive appliance to run in your home and that it only heats the water when it is necessary to do so for further use. Furthermore, this makes it the lower cost of products and a more convenient design all around.

Offering a digital display which shows you the temperature setting and maintenance codes, this appliance comes complete with a digital remote control, a 10 ft thermostat wire and a 120 Volt power cord.

4. Eccotemp i12-NG Tankless Water Heater

One of the lowest priced on the list here, the i12-NG tankless water heater comes exclusively from Eccotemp and is a most extraordinary new and improved revolutionary design. best indoor natural gas tankless water heater

The company believes this unique design is what makes it stand out proud from those other tankless water heaters on the current marketplace.

Encased in a sleekest of black gorilla casings, this is a thoroughly modern design which wouldn’t look out of place in any home!

This fantastic design also features a front panel which is glass tempered and promotes a more natural way to access the LED display controls.

These controls are fully automatic and control the temperature with just one precision touch, allowing a touch screen process. The temperature reading not only shows output temperature but also the GPM flow as well.

These automatic controls feature an energy saving mode. This also offers a child lock technology aspect, ensuring it’s ideal for those homes with younger members. In addition to this safety feature, this also has a safe electronic ignition system.

Aimed at delivering a hot water solution to the whole of the home indoors, this is a gas-powered heater liquid Propane fired, which is rated at an extremely impressive 3 GPM.

Best of all, it will only activate on demand and therefore does not require a pilot light. Ultimately, this means it works to reduce the homes energy consumption throughout, thus reducing bills in the meantime.

Catering to those smaller to medium homes, this is best where you may need more than the one hot water appliance at the same time. Therefore, it’s also ideal for uses in places such as cottages and vacation homes.

Along with your purchase of the Eccotemp tankless water heater, you’ll find a stainless steel horizontal vent kit and a 120 V UL listed power cord. This power cord works to power the appliances internal exhaust fan as well as its digital display.

This is also ready to install immediately and allows for one of the more convenient and quickest of fittings, using that standard of ½” NTP water fittings.

Claimed to only pull a mere two watts when idle and 1.07 amps during its operation, this is perhaps one of the best energy efficient appliances to choose from.

The 112-NG model is recommended for use to a total of 5500 foot, as it has been tested accordingly here. It isn’t recommended for use any higher than this and will plug directly into a standard 110 Volt electrical outlet which has a UL listed cord.

5. Rinnai V65IN 6.6 GPM Indoor Tankless Natural Gas Water Heater

The other Rinnai natural gas tankless water heater on the list here is the V65IN module, which is cheaper than the price of the RUC98iN. Rinnai V65IN 6.6 GPM Indoor Low NOx Tankless Natural Gas Water Heater

This indoor model is capable of efficiently delivering up to 6.6 gallons per minutes of hot water. This means that it’s the perfect addition to those homes which have one or two bathrooms.

An energy star qualified appliance, this is even certified for installation in those mobile home types as well.

Available in a selection of either propane or natural gas models, this model is also compatible with the full range of Rinnai digital controllers.

One of the more ultra-compact of units this is an easy to install model, whether you wish to vent this tankless heater to the roof in your home or whether you want it in place sideways to the wall.

Designed to ensure you make the most of all the benefits that a Rinnai tankless water heater can offer, this allows you to experience hot water, which is reliable, clean and at a consistent pre-set temperature every time.

Also, it ensures that you save on that most precious of floor space as well as energy when fully utilized within the home environment.

With this appliance, long term damage is prevented by the addition of an enhanced scale detection which lessens the possibility of any mishaps occurring during its use.

In addition to this, there’s a temperature lock function which prevents accidental changes or indeed unauthorized access to the water temperature itself.

A product fully compliant with the South Coast Air Quality Management District, this has low emission levels and is therefore suitable for domestic settings.

When you purchase the Rinnai natural gas tables tankless heater, as with their otherproducts, you’ll automatically receive their fantastic warranty. Though some restrictions will apply as to the individual model you buy here, the standard warranty consists of ten years in total for the heat exchange itself. These ten years refer to those residential and or space heating use. For those that install this heater into a residential unit using an isolation valve kit, this warranty is further extended to 12 years!

In addition to the heat exchanger warranty as standard, there is also a five years warranty on its parts and a one year warranty on its labor for residential.

Final Thoughts on Best Natural Gas Tankless Water Heaters

By reading through this extensive review, we hope to have enlightened you as to the many advantages and benefits of owning and installing a natural gas tankless water heater in your home.

Fast becoming one of the more popular of choices for so many a residential setting, and with many more of us becoming concerned about energy usage and broader environmental issues, these are certainly a fantastic choice for the home environment and even in those light commercial of places.

As you can see from the models reviewed above, not only do gas tankless water heaters reduce the amount of energy usage further afield, they also work to reduce the costs associated with running such appliances in the home. This means that you can operate your device without having to worry about any increases in price while you do so.

Initially, these may be quite a hefty investment, especially when you consider the more expensive of brands here, such as the Rinnai or Rheem for example. However, it’s worth bearing in mind here that these are long term,investment models.

The average lifespan of a water heater such as these models here is said to be around the 20 to 30-year mark. Therefore, when you calculate the costs and spread it over its potential lifespan, you can be assured that the significant initial outlay soon works out in your favor!

In addition to the money saving aspect over time, these are perhaps some of the easier of appliances to install with all of them coming complete with full kits to help you get the water heater fixed and fitted to your preferred place in no time at all.

Though some of these manufacturers will recommend having an experienced and skilled installation expert on hand, they all also state that these models can be fitted by home owners themselves.

Overall a natural gas tankless water heater is undoubtedly a significant investment which should be undertaken with care. However,the benefits that it derives both short term and over the long term more than proves that this is one of the most sensible options regardless of the size and capacity of your home and family.

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