Best Tankless Water Heaters: Reviews of Top Models in 2021

Tankless water heaters are more efficient than the traditional models. Tankless water heaters use less energy and save money on your utility bills. They also typically use less water, so they’re great for drought-stricken areas …

Tankless water heaters are more efficient than the traditional models. Tankless water heaters use less energy and save money on your utility bills. They also typically use less water, so they’re great for drought-stricken areas or those who want to conserve resources. If you’re looking for a tankless water heater in 2021, then this article is perfect! Here we discuss reviews of the top tankless models, including our favorite picks for best tanklessness in 2021!

Top 5 Best Tankless Water Heaters of 2021

1. EcoSmart ECO 27 Electric Tankless Water Heater

EcoSmart ECO 27 Electric Tankless Water Heater

Feature Of Product
  • Savings of up to 50% on water heating costs
  • Digital temperature control in 1-degree increments allows control of hot water
  • Copper and stainless components designed for efficiency, durability and easy replacement
  • Required Breaker Quantity: Three 40 Amp Double Pole
  • Recommended Electrical Panel: 200 Amps

The EcoSmart ECO 27 Electric Tankless Water Heater saves up to 50% on your water heating costs. The dimensions of the heater are 17 inches deep, 17 inches wide, 3.625 thick and it has a weight of about 14 pounds. It’s copper and stainless components designed for efficiency, durability and easy replacement will not disappoint you when push comes to shove with dependability in mind!

Consider this product as an option before installation or purchase since some models are too small for homes. This is due to space constraints or just the fact that there may be another more effective model size wise available at your local hardware store nearby.

 

2. Bosch Electric Mini-Tank Water Heater

Bosch Electric Mini-Tank Water Heater

Feature Of Product
  • 120V – require hard wiring
  • Product Dimensions: 10 x 10 x 16 inches
  • Weight: 29.5 Pounds
  • Maximum Operating Pressure

The Bosch Electric Mini Tank Water Heater is perfect for smaller homes. The heater features a convenient 120 V power cord to plug into an outlet, making installation a breeze compared to other models that can require hard wiring.

With 29.5 pounds of weight and 10″x10″x16″, this water heater will fit in tight areas without taking up too much space. It requires minimal maintenance with heating elements that self-clean, eliminating any buildup in your tank during operation meaning you can enjoy worry free use!

 

3. EcoSmart ECO 11 Electric Tankless Water Heater

EcoSmart ECO 11 Electric Tankless Water Heater

Feature Of Product
  • EcoSmart tankless electric water heaters are 90% smaller than traditional tank heaters
  • EcoSmart tankless electric water heaters are 99% thermal energy efficient
  • EcoSmart ECO 11 Sizing; 13-kilowatt tankless electric water heater
  • Provide between 1.3 and 3.1 gallons-per-minute depending on the inlet water temperature

Living in a tiny apartment doesn’t mean you have to suffer from cold showers – not with EcoSmart tankless water heaters. The EcoSmart ECO 11 electric tankless heater can’t get any more convenient. It’s devices like this that make it easier than ever before to live a greener life; talk about convenience! With 100 watts max electric use and endless on-demand hot water, when you need reliable and efficient heaters they’ve got you covered.

 

4. Stiebel Eltron Tankless Water Heater

Feature Of Product
  • Eco friendly unit saves energy with auto-modulation and the ability to electronically control water flow
  • Feature a digital temperature display and preset temperature and memory buttons
  • This specific model is 24kW, 240V, requires a min recommended electric service of 150 A
  • Offer an output water temperature of 68° to 140°F

Stiebel Eltron Tankless Water Heater is a high-quality, energy efficient water heater that never runs out of hot water. It provides endless hot showers and has a space-saving design with the elimination of bulky vents. Monitor your savings in both space -you’ll do as much laundry as you want to without tripping over hoses and furnace coils coming into and out of your home- and money -the energy monitor shows how much you save on utility bills each year!

 

5. Rheem RTEX-18 Electric Tankless Water Heater

Rheem RTEX-18 Electric Tankless Water Heater

Feature Of Product
  • External digital thermostatic control with LED display (+/1 degree accuracy)
  • Most advanced self-modulation, adjust power to meet hot water demand
  • Flow Rate- up to 4.4 GPM
  • Simple installation – bottom 3/4 inch NPT water connections
  • Threaded for easy replacement, simple installation, digital temperature display

The Rheem RTEX-18 Electric Tankless Water Heater with external digital thermostatic control allows you to adjust the power of your heating elements and maintain an accurate water temperature at all times. The durable Copper immersion two heating elements will last for years, while the simple installation process means no more waiting (or worrying) about replacing a faulty or malfunctioning tank and taking up any space in your home or office’s ceiling.

The RTEX-18 meets ASME A112.19.4 by utilizing NPT connections that are designed for easy replacement, as well as providing a threaded design so it can be easily installed for virtually any configuration involving hot water systems, whether it is building site supplied lines or onsite installations.

 

What to Consider When Buying a Tankless Water Heater

There are two things you need to consider before purchasing one, the flow rate and temperature rise or difference between groundwater temp and desired hot-water output temps. The more gallons per minute (GPM) your fixture needs, the higher up in wattage it will be so keep this in mind when picking out your new system!

Flow Rate (GPM)

To find your hot water needs, list the total number of appliances or fixtures you’ll be using simultaneously during peak demand: cooking in the kitchen sink and showering at the same time. Then add up each individual flow rate for a more accurate calculation of how much water is needed to fulfill all those simultaneous tasks.

The flow rate of your shower head is a metric that determines how much water you use in any given minute. As an example, one gallon per minute (GPM) means the fixture has to fill up 1 bucket with 60 seconds and 20 GPM would require 2 buckets over 120 seconds!

The total flow rate for peak usage while using the shower, kitchen sink and a high-efficiency washing machine is 6.0 GPM.

Temperature Rise

Groundwater temperature varies throughout the country and can range from a cool 36°F to scorching 75°F, measured in Fahrenheit. North America is broken into three climate zones with average groundwater temperatures: The arid south-west has much higher ground water temps than other regions at an uncomfortable 70+ degrees year round while more temperate areas are comfortable all year long!

  • Northern Zone: 37 degrees to 51 degrees
  • Central Zone: 52 degrees to 61 degrees
  • Southern Zone: 62 degrees to 77 degrees

The hottest water temperature is typically somewhere between 110 degrees and 120 degrees. If you want your shower to be a perfect 100 degree, then subtract the incoming 57-degree temp from that number! When you take a shower, the temperature naturally goes up by 63 degrees on average. This rise in temperature happens when we subtract the incoming water from our desired internal bathing water temp and divide that number by 9 (the conversion factor for Celsius to Fahrenheit).

Conclusion

We hope that you’ll find this article helpful in your search for the best tankless water heater. If there are any points we missed, please feel free to share them with us!  Thank you so much for reading our blog post today and stay tuned as we continue to provide more informative content on all things related to tankless water heaters!

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