When it comes to buying tankless water heaters, something must be taken into account.
GPM (the gallons of water per minute) – This is first and almost the most important thing you should pay attention to. If the one you bought cannot offer you enough water to take a shower, it is just a waste of money. Therefore, choosing the right sized one ranks first and you need to pay attention to the GPM when choosing a unit.
Efficiency Rating – It is commonly known that a much more efficient one can help to save a lot of energy as well as the money. Therefore, the higher its rating is, the more efficient it is. If you don’t want to increase you energy bill, you should consider this factor.
Easy installation – If a unit is easy to install, it will save you much time and money. Fortunately, most models are designed to be compact and easy to install. If you need one for you limited spaces, this factor is very important.
A Warranty – A good warranty is also very important. If the unit you bought has any problem, a good warranty helps. Generally, most tankless hot water heaters offer a 6-year warranty. If you just want one, pay attention to this.
We’ve done some research and made this list of best tankless water heaters, based on their GMP, efficiency ratings, easy installation, warranties, ease of use, as well as customer reviews.
Rheem RTGH-95DVN Condensing Tankless Water Heater
This unit comes with free ground shipping and if you want to get it within one day, you need to pay for a small fee for its overnight shipping. If your current heater is broken and want a new to replace, the service is great. This unit can produce up to 199 BTUs and it is also a higher efficiency rating model. Once you have water connections and gas ready, hook it up and hot water is ready for you.
Bosch C 1210 ES NG 225,000 BTU Natural Gas Tankless Water Heater
This one offers a very longer warranty and it comes with a 15-year limited warranty on main parts. It is expected to work for you for more than 20 years. This means even if the initial cost may be higher, the expense per day is very low. It is a great investment. It is a gas unit using both natural gas and liquid propane. The most impressive feature is that this unit can capture the heat from its vent to heat water incoming. This design makes it extremely efficient, producing the lowest noxious fumes. The condensing design is great.
Stiebel Eltron Tempra 24 Plus Tankless Water Heater
It is believed that this model is effective to reduce up to 60% of your water. The installation is relatively easy without any pressure relief valve and venting needed. It also comes with a remote control, so you can easily control it. Its compact design makes it suitable for even limited places. Its electronics is able to read the usage data and it also can manage power much more efficiently. If it isn’t used, no energy will be consumed. It uses city water, soft and hard water. It also provides a 3-year limited warranty on workmanship and main parts.
Eemax SS023240TC Whole House Tankless Water Heater
This unit only offers a 1-year limited warranty on parts but it comes with a 5-year warranty against leaks. It is very easy to install and it is capable of using up to 99% of its energy to heat incoming cold water, making it much more efficient than other models. What’s more, its efficient temperature control can make you no need to make any adjustment throughout a whole year.
Bosch Tronic 5000 Whole House Electric Tankless Water Heater
This compact heater is high quality and it is perfect for both residential and commercial use. Its temperature control gauge can make the hot water an even temperature. Although it is small in size, it is able to offer enough water for in-law suite, a smaller home, a separate bathroom, a kitchen or a garage. It also features easy installation. What’s more, its compact design makes it great for any small spaces and the manufacturer comes with a 10-year limited warranty for residential use and a 2-year limited warranty for commercial use.
This is our list of top 5 best tankless water heaters. If you need to buy a new one to replace your current one, it is really a good start. Any of them will not disappoint you.