Best Gas Tankless Water Heater 2025

Paying bills is a kind of painful obligation because you have to spend a lot of money each time. The question is can you make your annual spending lower? We’d like to present to you a great solution: gas tankless water heaters. This is a long-run solution that allows you to save hundreds of bucks a year. Just install a heater once and get your benefits for the rest of the time.

Since you might not hear about such devices before, it could be complicated for you to figure out everything about them on your own. To make it easier for you, we want to provide you with our top 15 gas tankless water heaters.

FAQ

TOP 15 Best Gas Tankless Water Heater

#1 Rinnai RUC98iN Ultra Series Indoor Natural Gas Tankless Water Heater

The number one on the list is actually the number one among all other competitors. Of course, it depends on the situation, but this is one of the techiest heaters on the market. This is a high-quality expensive model that should be installed indoor and offers the following characteristics: new condensing technology with high energy savings (up to 0.96 Energy Factor), natural gas or propane heating with a residential temperature range of 98°F to 140°F and 98°F to 185°F commercial range (the controller is sold separately), and a gas rate Input BTU's of 15,200 – 199,000. Plus the manufacturer offers a great warranty.

#2 Rinnai V65eN Tankless Hot Water Heater

One more representative of the previous brand but much cheaper. For those who don’t need such a powerful water heater, there is a V65eN that is perfect for outdoor installations and offers Min. 10,300 BTU / Max. 150,000 BTU, 6.6 gallons of hot water per minute, and 0.82 maximum energy factor. It supports up to five fixtures and it’s capable of wi-fi connection. Plus, it’s rather compact, which increases mobility. Natural gas is used. Although this model is not as expensive as the previous one, it still has a quite high price.

#3 Camplux 10L Outdoor Portable Propane Gas Tankless Water Heater

The next one is a low-budget solution at a decent price. It actually has great value for money, so it can suit almost every situation. This model is designed mainly for outdoor use because it requires an additional flue pipe for indoor installation. The heater provides 2.64 gallons per minute with a maximum power output of 68,000 BTU per minute and 110.0 PSI water pressure. Use the heater outdoor with the help of 2 «D» cell batteries, connect a 12V water pump, and take it with you with a breeze.

#4 VEVOR 12L Propane Hot Water Heater

Although this model is not expensive at all, it provides a lot of decent features. First of all, it’s needed to mention, that this device has great durability and protection. It’s made of stainless steel and offers anti-freezing protection, overheating protection, water pressure control, and other useful technologies. Another interesting advantage is the LCD screen that allows you to adjust the temperature, set the automation, and so on. The second important detail is that this heater uses liquified petroleum gas. The characteristics are 12L (3.2 gallons) per minute, 24KW (82,000 BTU) heat load, and a 2800P (0.4 PSI) gas pressure.

#5 Eccotemp FVI12-LP Liquid Propane Gas Tankless Water Heater

Eccotemp also offers to us a good inexpensive solution. This propane-powered water heater is designed for indoor use and ensures a 3.6-gallon per minute water flow at a temperature of 77-degree F and maximum water pressure of 80 PSI. Thanks to the built-in digital display you always know the exact temperature. Plus, this model is easy to install due to its compact design. Plug the device into a standard 120V outlet and enjoy hot water whenever you need it.

#6 Camplux 2.64 GPM Residential Indoor Tankless Water Heater

In the 6th place, we’ve got a compact and durable water heater with a beautiful modern design. This model is protected from overheating, freezing, low water flow, high water pressure, and other accidents, Also, it’s equipped with a Fahrenheit digital display and eco\full switcher, which makes it convenient to use the device. The heater uses propane and should be powered with a standard 120V outlet. It suits indoor use and provides these characteristics: 0.4 PSI gas pressure, from 3.6t o 110.0 PSI water pressure, 68,000 max BTU, 77-degree F temperature range, and 2,64 GPM.

#7 Camplux Pro Outdoor Propane Gas Tankless Water Heater

This outdoor model is designed for residential heating and offers decent features for a quite reasonable price. However, the price is still higher than the average. So, this heater is large but easy to install, has all the necessary protection functions, and uses propane gas to heat water. Convenient adjustment and a clear display help you use the device. It offers a 0,82 max energy factor, 6.86 gallons per minute, 180,000 max BTU per hour, and from 99ºF(37℃) to 140ºF(60℃) temperature range. This heater is a good choice if you can afford it.

#8 Excel Pro Tankless Gas Water Heater

One more big model to meet larger water needs that also has a nice convenient design and powerful characteristics, It suits small or medium houses and delivers 6.6 gallons of water per minute with a maximum gas output of 140,000 BTU. Although these parameters are a bit lower, compared to the previous model, the max energy factor of this model is 0.85, meanwhile, the water pressure’s maximum value is 150 PSI. You can also operate the device with the help of a little display, but there are no such functions, as other similar models offer,

#9 GASLAND Portable Tankless Gas Water Heater

If you are looking for a hot water solution for camping or something like this, this compact, battery-powered, inexpensive, and durable water heater will suit you well. It delivers 1,58 gallons per minute with a 110,0 PSI maximum pressure and 41,000 BTU per hour maximum power output. Besides, this model is protected from overheating, high pressure, and so on. Propane is used to operate.

#10 TC-Home Propane Gas 12L Tankless Water Heater

Need something even cheaper? This model will satisfy you. The heater ensures 12L / 3.2 gallons per minute, 24KW / 82,000 BTU per hour heat load, and 2800P / 0.4 PSI gas pressure. Liquid petroleum gas is used. It’s small, affordable, and energy-saving, which makes it a perfect indoor solution. There are not many functions or modern features, but there is enough to make your water hot whenever you want, The model is also protected from overheating and high pressure.

#11 EZ 101 Propane Tankless Water Heater

The next model is also from the low-budget segment. It’s a nice, small gas water heater with independent gas, water, and temperature control that delivers 1.6 gallons per minute. In addition to this, you obtain a shower head with hose. For those who need to take a heater with them, to wash pets, or anything else, it’s a great choice for a low price. However, the characteristics are also low.

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

The ultimate solution that suits residential and commercial indoor needs. It delivers the insane amount of water — 10 gallons per minute with gas inputs of 199,000 BTU per hour. The heater has a minimalistic design with a convenient display. It’s massive, a little noisy, but extremely easy to use. Just install it once and save money all your life. Moreover, with the help of various protection features, such as antifreeze or surge protection, this unit will operate much more than cheap heaters. Natural gas is used.

#13 Foruee Portable Propane Tankless Water Heater

Portable heaters are very popular in hot seasons. So, if you want to choose one for camping or any other outdoor needs, you can take this model. It has a beautiful easy-to-carry design, a full complete set, and a reasonable price, which is super convenient because you don’t need to buy additional details separately. This model provides 1.32 gallons per minute, 34,000 BTU/Hr, and 2.5~110 PSI water pressure. To power the heater, you will need 2 D cell batteries. All protection functions are supported, propane is used.

#14 AQUAH Indoor Natural Gas Tankless Water Heater

As you can see in the name of this model, this is a rather compact water heater for indoor use that uses natural gas and delivers 3.2 gallons per minute. Its gas output is up to 82,000 BTU per hour. The heater could be powered with 2 D batteries. It’s another great inexpensive solution for the home. Convenient controllers will help you out in using the unit.

#15 Rheem RTGH-95XLN Prestige Natural Gas Outdoor Water Heater

For the last position, we have a kind of industry giant Rheem with a great model that suits perfectly the majority of occasions. This is a durable outdoor water heater made of stainless steel that delivers 9.5 gallons of water per minute and has a significant energy factor of 0.94. The design is minimalistic and there are no extra details, which makes it simple to use the device. The heater can be used for residential needs and commercial needs. Natural gas is used.

Conclusion

So, now you know what model to choose. But if you haven’t decided yet, here are the best models from the low-budget segment and the best expensive models as well.

Cheap:

• #4 VEVOR 12L Propane Hot Water Heater;
• #13 Foruee Portable Propane Tankless Water Heater.

Expensive:

• #1 Rinnai RUC98iN Ultra Series Indoor Natural Gas Tankless Water Heater;
• #15 Rheem RTGH-95XLN Prestige Natural Gas Outdoor Water Heater.