Best Tankless Gas Water Heater

When you switch to a best tankless gas water heater, you will have endless hot water, extra storage space, and less energy bills. For the betterment of Environment, these heaters are also better than a tank unit because a rusted storage tank unit doesn’t end up in the landfill. Tankless water heaters also typically have longer warranties than regular heaters. Most of them last more than 21 years–about double the lifespan of storage tank water heaters.

In an estimate from the Energy Department of U.S., tankless gas heaters save an average of $109 in energy costs per year, as opposed to their conventional tank counterparts. Electric tankless heaters only save $44 per year.

So, now you’re wondering if you need a tankless gas water heater for yourself. There are a few things to consider figuring out if a tankless heater would be right for you. First of all, determine what you would use the unit for. Would you use it to heat water in one room, or for your entire house? Also, there are two different kinds of models of tankless heaters. An electric model will need the proper voltage, amperage, and circuit breaker. The gas-fired models need to be vented.

Do you have enough room in your home for a tankless heater? They must be within roughly 50 feet from a power source. They can be mounted on an interior or exterior wall.

You should choose your tankless gas water heater based on several aspects.

First, decide between the electric model and the natural gas model. Major differences exist between them, even drastic differences like the need to rewire the electrical system in your home. Electric tankless heaters are very efficient, but they don’t qualify for rebates.

You should also decide what kind of tankless heater to get based on the product description. The selection of tankless gas heaters is pretty wide, so don’t make a hasty decision. Here are five great tankless gas water heaters that you’ll be sure to love.

5 Best Tankless Gas Water Heater Reviews

Takagi T-KJr2-IN-NG Indoor Tankless Water Heater, Natural Gas 


This is a fully modulating compact model, gas fired, tankless unit. It is an ideal one for residential applications. With 140,000 BTU gas inputs; this model can produce more than enough warm water for two bathrooms in warm climates. It provides hot water to domestic warm water systems, directly and indirectly, which can be used with hydronic heating systems, storage tanks, recirculation systems, domestic heating applications and radiant floor systems.

It has a 14 to 15-year limited heat exchanger, an energy factor of 0.82 for natural gas, and 6.6 GPM maximum flow rate at 35°F. It includes both a remote control and power cord and vents with category III stainless steel. It has safety features like surge protection, freeze protection, and troubleshooting diagnostic codes.

Customers are very satisfied with this heater because they know they won’t run out of hot water. For example, you can run your dishwasher three times a day, wash five loads of clothes, and have five or six people take showers–without worrying if the hot water will run out. If you have an average size family, this product will be perfect for you. You’ll easily have enough hot water to do your daily tasks, and you’ll have extra to use for something like a Jacuzzi tub.

 Rinnai RUC98iN Ultra Series Natural Gas Tankless Water Heater 


This tankless water heater is Energy Star qualified. It has an energy factor of 0.95 for propane and natural gas and has enhanced scale detection which lessens the possibility of serious, long-term damage to the unit. Its built-in circulation program cycles an external pump at predetermined intervals & temperatures to maximize comfort and efficiency. The temperature lock function that this tankless heater has prevents accidental changes to the temperature of water. There are several venting options available in this model, including PVC/CPVC using an adaptor that allows an easy installation.

With this product, the venting fan runs whenever the hot water heater is on, and it continues to run even after the hot water is turned off. However, it runs very quietly. It can heat up water to 140 degrees even in freezing temperatures. If water is running into your home at 35 degrees, you can still be confident that this water heater won’t fail you.

Also, Rinnai is a great water heater brand because they offer easy installation with too many venting choices right out of the box. They are the only manufacturer to offer both twin-pipe PVC venting and concentric, and no adaptor is needed on every installation to give you twice the venting options.

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


This water heater provides all the hot water you’ll need for about three to four bathrooms. It uses natural gas and has an energy-saving design. It has a self-diagnostic program, digital display settings, exclusive sensing burner technology, and a built-in electric blower. It comes with a 12-year warranty on its heat exchanger and a five-year warranty on certain parts. If you have a very large home, you can buy two or three of these because this heater can connect to itself. The installation of this heater is very simple.

This heater is perfect for limited spaces because of its very small size. If you’re looking for something that will fit into a small space, this product is for you. If you’re installing it into a laundry room or basement, it will definitely make the room feel less crowded.

The hottest temperature it will heat water to is 120 degrees, which is basically the same as any storage unit. You can be confident in this product as customers say that never run out of hot water, even when they wash the dishes and do laundry at the same time. This product really does have all the benefits of a storage unit and a tankless unit in one.

 Bosch 520 PN NG Therm Tankless Water Heater, Natural Gas 


This model offers push-button ignition and uses a modulating gas valve to maintain a continual temperature at varying flow rates. This heater is a perfect solution for smaller families and households that don’t use more than 3 hot water applications at a time. It will provide endless hot water, but also saves money because it only heats water when you need it. You’ll definitely see a decrease in your bills.

This product is fantastic because you don’t need electricity to use it. You can buy this heater to use as your main heating system, or you can buy it as a backup heater in case of losing power. Many customers who bought this product bought it specifically because they live in areas where they lose power frequently, and this heater is always reliable without electricity. It’s really hard to find a tankless water heater that has this ability.

Like any other electric wall heater you don’t need a professional to install this product–it’s very simple, and you can do it yourself. The instructions are understandable, and you should be able to install it within 1 or 2 hours. This heater has every feature you could want–it’s small, you can install it yourself, and runs without electricity!

 Rinnai RUR98iN 9.8 Max GPM Ultra Series

Condensing Indoor Natural Gas Tankless Water Heater with Recirculation 


This Rinnai tankless heater has a very compact design. It is made specifically to fit into non-traditional places like an attic or crawlspace, so you can free valuable space in your home. This product comes with several venting options that allow for direct, concentric, or twin-pipe installations. It is perfect for any home!

This model includes a programmable 24-hour controller that allows you to set circulation cycles to align with your water use. That way, you can send hot water to any room in your home, whenever you need it.

Aside from having a great design, this model is also very reliable. You’ll be able to fill up your tub 3 to 4 times a day without a problem, along with doing daily tasks like dishes and laundry. This unit is capable of pumping out 9.8 gallons of hot water per minute–a truly amazing amount of water for a tankless heater. The maximum temperature you can heat water to is 120 degrees, even in a very cold climate. It pumps water very quietly–you’ll forget it’s even there. This is a truly amazing product that you can feel confident about purchasing.

Final Verdict

All of these products each have their own special features. Some of them are designed for small families, and some for large families. The good news is, each one of these models have a compact design and a very simple installation process. Going tankless will be a breeze if you buy any of these five models!

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