With that said, if you are interested in buying one, we have shortlisted some of the best tankless water heaters for you in this article. But, before you decide to buy one, make sure to check for a few things like:
Fuel Type: Tankless water heaters come in various different types. While the electric tankless water heaters are the most popular ones out there, you can also find water heaters that use Propane (LPG) or Natural Gas (Methane) as the fuel. Out of these two, natural gas water heaters are more cost-effective. Max Power Output: If you consider an electric water heater, the max power output for that will be mentioned in Watts. On the other hand, max power output for gas water heaters is measured in BTU/Hr. In both cases, the more powerful the water heater is, the faster it will be able to heat water. Water Flow Rate: Apart from picking a powerful water heater, don’t forget to check the water flow rate at which the heater can efficiently work. Usually, for residential use, a water heater with 5-10 GPM (gallons per minute) water flow is good enough so that you can use multiple faucets, and showers at the same time.
For more knowledge about tankless water heaters, we have also included a small and detailed buying guide in this article below. If you need assistance while choosing a suitable tankless water heater option for your home, the “Buying Guide” has enough information so you can pick an option wisely. Until then, let’s take a quick look at the list and help you find a good water heater.
Best Tankless Water Heater
Best Tankless Water Heater Reviews
1. EcoSmart ECO 18 Electric Tankless Water Heater
How Long Do Water Heaters Last? Gas Water Heater Venting Options
EcoSmart’s wide range of tankless water heaters is popular among the entire market for being highly affordable and reliable options for residential use. Talking about the EcoSmart ECO 18 model, it’s quite a durable and power-efficient option to choose as it saves up to 60% on your water heating costs, thanks to the advanced self-modulating technology which makes it only use the amount of energy that’s needed. It’s a perfectly ideal water heater for residential use as it delivers a max power output of 18kW. The installation process is pretty simple, and it even has a small LED display at the front and a high-quality temperature adjustment knob. With such a powerful power output, it can deliver a continuous stream of hot water at a rate of 1.8-4.3 gallons per minute, depending on the temperature of the inlet water. Apart from that, the ECO 18 model works with 2 x 40 AMP DP, and 2 x 8 AWG wire gauge, and requires 75 Amps power to work efficiently. Speaking of its warranty, EcoSmart believes in the build quality of its products and offers a lifetime warranty. Best Features:
Max power output of 18kW Delivers hot water at 1.8-4.3 GPM Uses self-modulation technology for energy saving
Pros:
Highly power-efficient Adjustable temperature control Comes with a lifetime warranty
Cons:
Takes a while to supply hot water at the beginning
2. Stiebel Eltron Tankless Water Heater
Stiebel Eltron is yet another well-reputed brand in the market that makes really high-quality electric water heater models, especially tankless ones. Speaking about its specifications, this water heater is capable of delivering a max power output of 14.4kW which is decent enough to provide you with hot water on-demand. Moreover, it works on a 240V supply and requires a minimum of 100 Amperage to function properly. The water heater is extremely reliable and effectively heats up water for you, thanks to the interior solid copper heating system that handles the job pretty well, and doesn’t even make much noise while operating. In fact, the heater is pretty compact and sleek and does not even require any venting, so the installation is quite simple. The best part about this water heater is that it can automatically control and reduce the flow of water if the demand exceeds the capacity to always maintain the temperature at a certain level. Moreover, the max water flow rate offered by this water heater is about 3 GPM, which is decent enough if you have a small family. Best Features:
Max power output of 14.4kW Delivers hot water at 3 GPM Advanced Flow Control technology
Pros:
Energy-saving water heater Small and compact Comes with pre-set temperature buttons
Cons:
A little expensive
3. Rheem Electric Tankless Water Heater
Coming over to the next tankless water heater, this one is offered by Rheem, a brand that is highly rated among the market and has a good reputation for providing decent after-sales services. This tankless water heater option from Rheem comes in a pretty sleek and stylish design and features a digital thermostatic control with an LED display that helps you adjust the temperature with +/1 degree accuracy. Apart from that, it utilizes self-modulation technology, it can adjust power to maintain continuous flow of hot water. Moreover, the max power output delivered by this electric water heater is 18kW and uses two durable Copper immersion heating elements to heat up water. With that said, it is capable of delivering hot water at a rate of 4.4 GPM which is quite satisfactory as multiple users can enjoy hot water at the same time. Best Features:
Max power output of 18kW Delivers hot water at 4.4 GPM Uses self-modulation technology
Pros:
Has digital thermostatic control Easy to install Decent power output
Cons:
Takes time if the inlet water is too cold
4. GREATBEAR Tankless Water Heater
If you are looking out for a budget-friendly electric tankless water heater, you should definitely check out the wide range of options offered by GREATBEAR. This time we have picked up the ECO130W, which is a 13000-watt tankless electric water heater with instant and endless hot water that heats up to 2.2GPM water from 67°F – 110°F (or higher). Thus, it is enough to use for a single shower, dishwasher, sink faucets, or washing machine. Despite being an affordable option, it has a max power output of 13kW that is good enough to heat water pretty quickly. However, it requires 240V 60 amp DP breakers and 6 AWG cable wire for use and provides hot water at a flow of 2 gallons per min, which is a bit slow as compared to other water heaters. This electric hot water heater will adjust power input as per the temperature setting and current flow rate to save your electric charges. This heater comes with a touch control panel and digital display which gives a clear idea of its working status. However, it is a good option for those who live in the northern parts where the temperature of normal water is too low. Speaking of its safety feature, it has water and electricity separation, dry heating prevention, sensitive leakage protection, intelligent self-modulating, over-temperature protection, stable temperature, high voltage protection, and much more. Moreover, if the water flow is not ideal, it has an auto shut-off function. Best Features:
Maximum power output of 13000 watts Delivers hot water at 2 gallons/min Sturdy body & intelligent control Smart self-modulation heating system Temperature range will be 77 to 131 degrees Fahrenheit Convenient to use with touch control panel and digital display Offers over temperature protection, sensitive leakage protection, or instant heating.
Pros:
Highly reliable, durable, and safe option Easy installation and simple operation Offer endless hot water heater for your daily needs. Adjustable temperature control Tested and designed to run efficiently for several years
Cons:
No information on its warranty. The GPM could have been better.
5. Marey ECO150 Tankless Water Heater
Marey is one of the best brands to choose in case you are extremely low on budget as its water heater options are quite reliable, and won’t even make your pockets much lighter. The Marey ECO150 is probably one of the most affordable water heater options that we have discussed so far. To function properly, it requires a 240V supply and 70 amp double pole breaker, so discuss it with an electrician prior to the purchase to install it correctly. Speaking of its features, it provides you with a simple and easy way to adjust the temperature while the LCD display guides you while you program it. The water flow rate that you can expect from this water heater model is about 2.5 GPM, which is pretty decent looking at its max power generation of 14.6kW. Apart from that, it also eliminates stand-by energy, making the operation overall energy-saving and efficient. Best Features:
Max power output of 14.6kW Delivers hot water at 2.5 GPM Adjustable temperature control
Pros:
Energy-saving water heater Highly affordable Good water flow rate
Cons:
Takes a minute to deliver hot water supply
6. EcoSmart ECO 11 Electric Tankless Water Heater
As we said earlier, EcoSmart offers a wide range of tankless water heater options, you can consider choosing the ECO 11 water heater if you are looking for something highly affordable. Similar to the previous water heater we discussed, it’s the cheapest option that you can choose from this entire list of tankless water heaters. The ECO 11 is one of the most reliable offerings from EcoSmart as it’s power consumption is pretty low, yet it delivers a max power output of 13kW which is great. Despite being the cheapest water heater in the market, it is 99% thermal energy efficient and only uses the power when it’s needed, thanks to the self-modulation technology. Since it’s super-small and compact in size, the installation is quite easy and you can do it on your own as well if you are skilled enough. Apart from that, due to its small design, the water flow rate it delivers lies in between 1.3-3.1 GPM which is quite satisfactory. Moreover, EcoSmart offers a lifetime warranty for this water heater which is quite a good gesture. Best Features:
Max power output of 13kW Delivers hot water at 1.3-3.1 GPM Uses self-modulation technology for energy saving
Pros:
Highly thermal efficient water heater Satisfactory water flow rate Comes with a lifetime warranty
Cons:
Not ideal for 120V supply
7. Camplux Constant Propane Water Heater
For those people who are looking for an affordable tankless water heater that operates on gas instead of electricity, you can choose to go with water heater options offered by Camplux as they are quite reliable and ideal for household use. If you have a small family of about 3-4 members, this gas water heater from Camplux is going to serve you really well. It uses Propane as the fuel which is easily accessible and you can arrange it pretty easily. Speaking about its water flow rate, it is designed to provide up to 3.18 gallons of hot water per minute which is quite good considering its affordable pricing. Apart from that, it has a high power output of 82000 BTUs per hour, and works at a heating efficiency of 89.98%, thanks to its advanced engineering and robust design. Moreover, it has plenty of safety features like Dry combustion, flame failure device, anti-freezing protection, and overheating protection, etc. Best Features:
Max power output of 82000 BTUs/Hr Delivers hot water at 3.18 GPM Comes with overheating protection and anti-freezing protection
Pros:
Elegant and modern design Intuitive LED touchscreen for control Heating efficiency is quite high
Cons:
Requires proper ventilation
8. Rinnai Indoor Tankless Hot Water Heater
In the category of gas tankless water heaters, you will definitely like the options offered by Rinnai as it’s one of the top-tier brands, and highly popular among the market for making powerful and premium water heaters. The Rinnai V65iN water heater model has quite a compact design, it can be installed even in smaller rooms very easily. On top of that, since this gas water heater uses Natural Gas, it’s going to save you a lot of money over time. In fact, it’s one of the most premium gas water heater options out there as it delivers a brilliant power output of 150000 BTUs/Hr while delivering hot water at a good rate of 6.3 GPM. Apart from that, it uses little to no amount of electricity as it consumes only 76 Watts and 2 Watts when on standby. If you are concerned about the safety features, this water heater boasts a gas leak detection feature that will automatically shut off this heater to avoid any accident from happening. Since Rinnai is such a highly reputed brand, it also offers a 10-year warranty for the heat exchanger of this water heater. Best Features:
Max power output of 150000 BTUs per hour Delivers hot water at 6.3 GPM Comes with a gas leak detection feature
Pros:
Power output is very good Ideal for families up to 6 members Comes with a 10-year warranty for the heat exchanger
Cons:
Installation takes time
9. GASLAND Tankless Water Heater
Next up, we have yet another gas tankless water heater which is offered by Gasland. But unlike the other ones, this one is quite unique as it’s portable and is actually meant for outdoor use. It’s a highly suitable option to choose if you like going out on long vacations or picnics, and don’t like using cold water. This portable gas water heater works using propane and can be installed very conveniently in an RV trailer. In fact, it comes with its own in-built shower head, so installation is not a problem, as all you need to do is connect this to a power supply, water inlet, and provide a fuel supply to it. With 41000 BTUs per hour power output, it can provide you with a continuous water flow at a rate of 1.58 GPM on-demand. Although it’s a portable and lightweight water heater, it’s constructed really well and features advanced combustion technology that stops it from making any unnecessary noise while operating. Best Features:
Max power output of 41000 BTUs/Hr Delivers hot water at 1.58 GPM Uses advanced combustion technology for quiet operation
Pros:
Good for outdoor use Lightweight and easy to carry Heat and water flow is fully adjustable
Cons:
Not an ideal option for residential use
10. Eccotemp i12-NG Natural Gas Tankless Water Heater
Lastly, you should not miss out on checking this mid-range gas tankless water heater option from Eccotemp as its highly power-efficient has been rated quite good by all the past customers. Water heaters from Eccotemp are most popular for being durable and reliable, as this model also comes with CSA certification to prove it. The installation is fairly easy as it requires 4” venting, however, the venting kit is not included in the package, so you have to buy it separately. Although it’s a budget-friendly water heater, it delivers water at a decent flow rate of 3 GPM which is good enough for a family of 5-6 members. If we talk about its power output, it can burn up to 75,000 BTU per hour to provide you with a continuous hot water stream on-demand for as long as you want. Apart from that, since it uses natural gas, it’s quite environment-friendly, and energy-efficient as well. On top of that, Eccotemp also offers a 2-year long warranty for this heater which is a great add-on. Best Features:
Max power output of 75000BTUs/Hr Delivers hot water at 3 GPM Comes with CSA certification
Pros:
2-year warranty High energy-efficiency Affordable pricing
Cons:
The venting kit is not included in the package
Buying Guide for the Best Tankless Water Heater
Instant water heaters, or say, tankless water heaters are the most appreciated because of their capability to deliver on-demand hot water, for as long as required. That said, if you are looking for one, we have already mentioned a bunch of good options in the list above already. However, if you are not able to decide which one to pick, reading this buying guide might help you out a little bit. We will be covering all the major important factors that every buyer should consider before spending their money on a tankless water heater, so don’t forget to give this guide a thorough read, as it contains a lot of helpful information for you.
Water Flow Rate
First of all, depending on your hot water requirements, if you have a large family of more than 6 members, a water heater with a high water flow rate is recommended. In other words, if you want your water heater to provide hot water in two or more showers and a few faucets at the same time, it should at least have a water flow rating between 5-10 GPM. On the other hand, if you have a small family of about 3-4 members, you can also choose water heaters that offer a flow rate of 3-5 GPM.
Fuel Type
As you might already know, tankless water heaters do come in a lot of varieties, such as some operate using electricity while the others use gas as fuel for combustion to heat up water. Hence, depending on your requirements and choice, you can choose an option that suits you the best. Generally, if you are not going to use the heater daily, you can invest in an electric water heater as they require less maintenance. On the other hand, for everyday use, a natural gas water heater is quite a reliable option for household use. On the other hand, if you want a portable water heater, you should go for propane water heaters as they are generally easy to use and install as well.
Power Output
To check how powerful a water heater is, you can check its power output. In the case of electric water heaters, the power output is generally measured in watts such as 14kW, 18kW, etc. where more power is obviously a better option to pick. On the other hand, the power output of gas water heaters is measured in BTUs/Hr which is typically the rate at which the heater heats up the water. So, in this case, also, the larger numbers usually mean more power. For instance, a water heater with 150000 BTUs/Hr output will obviously heat up water faster than a 41000 BTUs/Hr water heater. So, to manage the continuous flow of hot water, less-powered gas water heaters offer water at a slow rate to heat it optimally to your desired temperature.
Venting
In the case of electric water heaters, ventilation is not as needed. But, if you are looking forward to choosing a gas tankless water heater, taking care of proper ventilation is quite necessary as various harmful gases are released along with steam during the combustion of natural gas or propane. While some of the water heaters come with a venting kit included in the box, not all of them. So, make sure to check for that before buying, otherwise, you will need to buy a venting kit from the after-market separately.
Warranty
Although the build quality of all the water heaters that we have mentioned in the list is top-notch. And, they also come with plenty of safety features, there may be situations where your water heater might just stop working or any part gets damaged somehow. In that case, if you have the water heater under its warranty, getting a free repair or replacement becomes very easy. For your peace of mind, we have only chosen water heater options from well-reputed brands that offer good and long warranties for their products. While some brands offer a 5-10 year long warranty, there are a few options that also come with a lifetime warranty as well.
Conclusion:
We hope you have read about all the tankless water heaters, and also the buying guide that we have mentioned for you. So, if you did, choosing the best suitable water heater option from the list should not be a hard task for you, as we have clearly mentioned all the important details. In case you are still not able to make your final decision, we have a few good personal recommendations, so feel free to choose one from them and get yourself a good water heater for your home.
In case you want an electric water heater, the EcoSmart ECO 18 Electric Tankless Water Heater should be your first choice to pick as it has a power output of 18kW, and offers hot water at a rate of 4.3GPM. In fact, the self-modulation technology makes it use less power and saves energy. On top of that, the lifetime warranty offered by the brand accounts for its high reliability. If you have a big family and the hot water requirement is high, you should choose the Rinnai Indoor Tankless Hot Water Heater V65iN as its rated power output is 150000 BTUs/Hr, and is capable of delivering water at 6.3 GPM. Since it uses Natural Gas, it’s environment-friendly and will help you save a lot of money in the long run. Moreover, the brand also offers a 10-year warranty for the heat exchanger unit which is quite good. On the other hand, if you are looking for an affordable and portable water heater for your RV trailer, the GASLAND Outdoors BE158 Portable Gas Water Heater is the best option to pick. It comes with an in-built showerhead and delivers a max power output of 41000 BTUs/Hr by propane combustion. In addition, the installation is quite simple and you will also get a 1-year warranty on it.
Comment * Name * Email * Website
Δ
