Tankless water heaters are super popular now ’cause they **save energy** and give hot water **fast**. **Tankless** models heat water as it flows through the pipes, unlike old models with a big tank. No waiting for a tank to warm up, just endless hot water whenever needed.
When it comes to choosing the best tankless water heater, there are several factors to consider. One of the most important is the size of the unit. Tankless water heaters come in a range of sizes, and it’s important to choose one that is appropriate for your household’s hot water needs. Other factors to consider include the unit’s energy efficiency rating, its flow rate, and its overall durability and reliability.
At [publication name], we spent countless hours researching and testing tankless water heaters to identify the ones that offer the best combination of performance, efficiency, and value. In this article, we’ll share our top picks for the best tankless water heaters on the market, as well as provide some tips on what to look for when making a purchase.
Best Tankless Water Heaters
We understand the importance of having a reliable and efficient source of hot water in your home or business. That’s why we’ve researched and tested various tankless water heaters to bring you our top picks. Whether you’re looking to save space or reduce your energy bill, we’ve got you covered. Below is our list of the best tankless water heaters on the market.
Rheem 18kW 240V Tankless Electric Water Heater
If you’re looking for a tankless electric water heater that can provide hot water on demand for your whole house, the Rheem 18kW 240V Tankless Electric Water Heater could be a good choice for you.
Pros
- The external digital thermostatic control with LED display (+/1 degree accuracy) makes it easy to adjust the temperature to your liking.
- The most advanced self-modulation technology can adjust power to meet hot water demand, which means you won’t run out of hot water.
- The durable copper immersion two heating elements are field serviceable and can provide a flow rate of up to 4.4 GPM.
Cons
- Installation requires a bottom 3/4 inch NPT water connection, which may be difficult for some users.
- Some users have reported that the unit can be noisy during operation.
- The unit may not be suitable for larger households with high hot water demand.
We recently installed the Rheem 18kW 240V Tankless Electric Water Heater in our home, and we’ve been impressed with its performance so far. The external digital thermostatic control with LED display makes it easy to adjust the temperature to our liking, and the most advanced self-modulation technology ensures that we never run out of hot water.
The durable copper immersion two heating elements are field serviceable and can provide a flow rate of up to 4.4 GPM, which is more than enough for our household. However, we did have some difficulty with the installation process, as it requires a bottom 3/4 inch NPT water connection.
One downside to the unit is that it can be noisy during operation, which may be a concern for some users. Additionally, the unit may not be suitable for larger households with high hot water demand.
Overall, we’re very satisfied with our purchase of the Rheem 18kW 240V Tankless Electric Water Heater. It’s a great option for mid-range whole-home applications, and the sleek, compact size allows us to save space and place the unit wherever we want.
EcoSmart ECO 27 Tankless Water Heater
If you’re looking for a cost-efficient and space-saving solution to your hot water needs, the EcoSmart ECO 27 Tankless Water Heater might be the right choice for you.
Pros
- Endless on-demand hot water
- Saves space
- Saves energy
Cons
- Requires 3×40 AMP Double Pole Breaker
- Might not be suitable for areas with high incoming water temperature
- Might not be enough for large households with high water usage needs
This tankless water heater is well-suited for homes in the northern U.S., Canada, and in the southern U.S. for large Roman-style or Jacuzzi tubs that generally have more demanding water usage needs. With its self-modulating flow sensor technology, it can regulate the amount of energy required to heat the water needed, ensuring efficiency and consistent performance within 1 degree of the selected temperature.
One of the biggest advantages of the EcoSmart ECO 27 is that it provides endless on-demand hot water, so you never have to worry about running out of hot water again. It’s also 90% smaller than traditional tank heaters, which means it can save you up to 12 cubic feet of storage space. Additionally, it’s 99% thermal energy efficient, which can save you up to 50% in water heating costs according to the Department of Energy.
However, it’s important to note that the EcoSmart ECO 27 requires 3×40 AMP Double Pole Breaker, which might not be suitable for all households. It’s also configured for climates where the incoming water temperature can reach as low as 37 degrees, so it might not be suitable for areas with high incoming water temperature. Lastly, it might not be enough for large households with high water usage needs.
In conclusion, if you’re looking for a cost-efficient and space-saving solution to your hot water needs, the EcoSmart ECO 27 Tankless Water Heater is definitely worth considering. It provides endless on-demand hot water, saves space, and saves energy. However, make sure to verify that this model is the right size for your hot water needs and electrical requirements before purchasing and installing it.
EcoSmart ECO 11 Electric Tankless Water Heater
If you’re looking for an energy-efficient, space-saving tankless water heater, the EcoSmart ECO 11 is an excellent option.
Pros
- Endless hot water supply
- Compact size saves space
- Energy-efficient and cost-effective
Cons
- Not suitable for larger households with high hot water demand
- Installation may require professional assistance
- Inlet water temperature affects the unit’s performance
We’ve been using the EcoSmart ECO 11 for several months now, and we’re impressed with its performance. The tankless design ensures that we never run out of hot water, and the digital temperature control allows us to set our desired temperature accurately.
One of the best features of this unit is its compact size. It’s 90% smaller than traditional tank heaters, making it ideal for smaller homes, apartments, or offices. We installed it on the wall, and it doesn’t take up much space at all.
The EcoSmart ECO 11 is also highly energy-efficient. It only heats water when we need it, unlike traditional tank heaters that maintain a constant temperature even when not in use. This feature has helped us save money on our energy bills.
However, it’s essential to note that the EcoSmart ECO 11 is not suitable for larger households with high hot water demand. It’s ideal for providing hot water for one shower head and one sink, but it may struggle to keep up with multiple showers or high-flow appliances.
Installation of the EcoSmart ECO 11 requires some plumbing and electrical knowledge, and it may be best to hire a professional. Additionally, the unit’s performance is affected by the inlet water temperature, so it’s essential to check if it’s suitable for your climate and hot water needs.
Overall, we highly recommend the EcoSmart ECO 11 for its energy efficiency, space-saving design, and endless hot water supply. It’s an excellent option for smaller homes or offices with low to moderate hot water demand.
Rheem RTEX-24 Electric Tankless Water Heater
If you’re looking for a reliable, energy-efficient and space-saving electric tankless water heater, the Rheem RTEX-24 is a great choice.
Pros
- The ON/OFF Dial Control with adjustable digital temperature display is easy to use and allows you to set the temperature to your desired level.
- The self-modulating power control ensures that the unit uses only the necessary energy to heat the water, resulting in significant energy savings.
- With a flow rate of up to 5.9 GPM for RTEX-24, you’ll have a continuous supply of hot water for your whole home.
Cons
- Some users have reported that the 24 kW model lacks the necessary power to provide hot water at full flow rate during winter months.
- The Bottom 3/4″ NPT water connections might not be compatible with all plumbing systems.
- While the unit is relatively easy to install, it might require professional installation for some users.
We recently installed the Rheem RTEX-24 in our home and have been impressed with its performance. The unit is compact and can be installed anywhere, including under the sink. We appreciate the LED display that shows the current temperature and the ON/OFF Dial Control that allows us to adjust the temperature easily.
The self-modulating technology is a great feature that ensures that the unit only uses the necessary energy to heat the water. This has resulted in significant energy savings for us. We also appreciate the continuous supply of hot water, which is perfect for our whole-home needs.
However, we have noticed that the unit struggles to provide hot water at full flow rate during winter months. This might be a concern for users who live in colder climates. Additionally, the Bottom 3/4″ NPT water connections might not be compatible with all plumbing systems, so users should check their plumbing system before purchasing the unit.
Overall, we highly recommend the Rheem RTEX-24 Electric Tankless Water Heater for its energy efficiency, space-saving design, and continuous supply of hot water.
ECOTOUCH Tankless Water Heater
If you’re looking for an electric tankless water heater, the ECOTOUCH ECO65B is a great choice for point-of-use hot water.
Pros
- The instant water heater supplies endless hot water of 110℉ or higher temp in seconds, with no waiting for preheating nor terrible temp fluctuation.
- The tankless water heater adjusts power input based on flow rate and temp setting in real time, ensuring optimal energy efficiency of 98%.
- The electric tankless water heater comes with a digital display and touch control panel, making temperature setting an easy job.
Cons
- The product is designed for point-of-use and may not be suitable for larger households.
- The water flow sensor can be inconsistent and may result in scalding hot water if the flow is reduced.
- The unit does not hold temperature as well as some other models, unless the flow rate is slowed down to less than the rated GPM.
We recently installed the ECOTOUCH ECO65B in our kitchen sink and have been impressed with its performance. The unit is compact and easy to install, with plumbing connections of 1/2″ NPT. The digital display and touch control panel make it easy to set the temperature, and the unit adjusts power input based on flow rate and temp setting in real time.
One thing to keep in mind is that the unit is designed for point-of-use and may not be suitable for larger households. Additionally, the water flow sensor can be inconsistent and may result in scalding hot water if the flow is reduced. However, overall we have been pleased with the unit’s performance and would recommend it for point-of-use hot water needs.
In summary, if you’re looking for a compact and efficient electric tankless water heater for point-of-use hot water needs, the ECOTOUCH ECO65B is a great option to consider.
Buying Guide
When looking to purchase a tankless water heater, there are several key features to consider. By evaluating these features, you can ensure that you choose the best product for your needs.
Flow Rate
One of the most important features to consider when purchasing a tankless water heater is the flow rate. This refers to the amount of hot water that can be produced at any given time. To determine the right flow rate for your home, you’ll need to consider the number of people in your household and how many hot water appliances you use at the same time.
Energy Efficiency
Another important factor to consider is energy efficiency. Look for a tankless water heater that has a high Energy Factor (EF) rating. This rating measures how efficiently the unit uses energy to heat water. The higher the EF rating, the more energy-efficient the unit is.
Size
The size of the tankless water heater is also an important consideration. Make sure to choose a unit that is appropriately sized for your home. A unit that is too small may not be able to keep up with your hot water demands, while a unit that is too large may be inefficient and waste energy.
Fuel Type
Finally, consider the fuel type of the tankless water heater. Options include electric, natural gas, and propane. Each fuel type has its own advantages and disadvantages, so choose the one that best fits your needs.
By considering these key features, you can choose the best tankless water heater for your home.
Frequently Asked Questions
What factors should be considered when choosing a gas versus electric tankless water heater?
When choosing between a gas and electric tankless water heater, there are several factors to consider. Gas tankless water heaters tend to have higher flow rates and can handle larger hot water demands, making them a good choice for larger households. However, they also require proper ventilation and a gas line, which can increase installation costs. Electric tankless water heaters are generally more compact and easier to install, but may not be able to keep up with high hot water demands.
How do Rinnai and Navien tankless water heaters compare in terms of efficiency and reliability?
Rinnai and Navien are both well-known brands in the tankless water heater industry. In terms of efficiency, both brands offer high-efficiency models that can help save on energy costs. In terms of reliability, both brands have a good track record, but it’s important to note that proper installation and maintenance can also play a role in the longevity of the unit.
What size tankless water heater is necessary to accommodate a large home with high hot water demand?
The size of the tankless water heater needed for a large home with high hot water demand will depend on several factors, such as the number of bathrooms and the hot water usage habits of the household. It’s important to consult with a professional to determine the appropriate size for your specific needs.
Which tankless water heater brands are most recommended by Consumer Reports and industry experts?
Consumer Reports and industry experts often recommend brands such as Rinnai, Navien, and Rheem for their reliability and efficiency. However, it’s important to do your own research and consider factors such as cost and specific needs before making a decision.
What are the common maintenance requirements for propane tankless water heaters?
Propane tankless water heaters require regular maintenance to ensure optimal performance. This includes flushing the unit annually to remove mineral buildup and checking the gas pressure to ensure proper operation. It’s important to consult the manufacturer’s instructions or a professional for specific maintenance requirements.
What are the potential drawbacks of installing a tankless water heater in a household?
While tankless water heaters offer many benefits, there are also potential drawbacks to consider. These may include higher upfront costs, the need for proper ventilation and gas lines (in the case of gas units), and the potential for inconsistent water temperatures if the unit is not properly sized for the household’s needs.