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05 Best Whole House Electric Tankless Water Heaters (Reviews – 2021)

Tankless water heaters have now become every house need for those who live in the area where the temperature gets too low in winter. The reason is when the temperature gets low it becomes impossible to take a bath or even use freezingly cold water in your house. As a result, you must have a water heater for the whole house to overcome this problem.

The next thing is which water heater should one choose. Well, the answer to this question is the whole house electric tankless water heater. There are quite solid reasons for choosing this type of heater over a whole house gas tankless water heater. The first one is it doesn’t need any ventilation system to remove all the unwanted heat as in the gas water heater. Moreover, you can fit it right into the place where you want to use it. Because it is tankless, it doesn’t require a large space to install it. It is also very safe to use these whole house water heaters in your house. But there is another difficulty. Which whole home tankless water heater is best?? There are so many brands and companies out there in the market that one gets too confused and makes the decision unknowingly. Subsequently, choose the wrong one.

To save you from getting stuck in this situation, “The BS Reviews” offers you the best whole house electric tankless water heaters reviews. This article is all about the best whole house electric tankless water heaters, their features, and things to consider while choosing one for your house. So, let’s start to explore the best brands available in the market.


Top 10 Best Whole House Electric Tankless Water Heaters Of 2021

Products Reviews On Amazon Want To Buy?
1) Stiebel Eltron – Tempra 36 Plus
4.6 Out Of 5 Stars
2) Rheem RTEX-24
4.5 Out Of 5 Stars
3) Ecosmart ECO 18
4.4 Out Of 5 Stars
4) ECOTOUCH ECO90
4.3 Out Of 5 Stars
5) Eemax EEM24027
4.3 Out Of 5 Stars

Detailed Features & Reviews

1. Stiebel Eltron Tankless Heater

Review: The The first product on our list is the stiebel eltron tankless heater Tempra 36 plus. This water heater can provide up to 7.6 GPM of hot water depending on the groundwater temperature. Which is suitable for 3 to 4 water connections at a time. Moreover, it has some advanced features in it that makes it quite different from others. It has digital temperature control with preset temperature options with a saving and water flow monitor. It is small in size with dimensions of ‎4.63 x 16.63 x 14.5 inches.

2. Rheem RTEX - Electric Tankless Heater

Review: Rheem RTEX-18 is made by the brand Rheem. This water heater provides you with a consistent hot water supply of up to 5.9 GPM. This water heater comes in gray color with a beautifully designed body. The material used in this water heater is alloy steel. The heating elements are made with copper and brass that increase the durability of the product. The dimensions of the product are 18.25 x 3.5 x 17.63 inches. It has an adjustable digital display that shows the set temperature of the whole house tankless water heater.

3. Ecosmart ECO 18 Electric Tankless Water Heater

Review: The ecosmart ECO 18 provides you about 1.8 to 4.3 GPM of continuous hot water supply to your home. The gallons per minute value varies by the inlet water temperature. This water heater is suitable for you if you want a water supply for a small home or apartment. It is small in size with dimensions of 3.63 x 14 x 17 inches and can be installed directly at a place where you want to use it. This product has high durability and is made with copper and stainless components. If your water supply needs are different from this product, you can also choose the other ecosmart water heater model with the supply range that matches your need.

4. ECOTOUCH ECO90 Electric Tankless Water Heater

Review: ECOTOUCH ECO90 is a small-range water heater with a stylish look. This water heater provides you 1.5 GPM of consistent water supply. This water heater has a sleek design and stylish look. It can be directly installed in the place where you want to use it. it comes with smart self-modulation technology with an upgraded heating system. According to the manufacturer, every part of this tankless water heater goes through several safety tests that make it more secure and durable. The size dimensions of this product are 15.4″(H) x 10.3″(W) x 2″(D). If you are looking for a water heater for single bath use then we will surely recommend this water heater for you.

5. Eemax EEM24027 Electric Tankless Water Heater

Review: The Eemax EEM24027 beautifully designed and stylish water heater with a blue stylish body that will go with the decor of your house. This water heater has a consumption of 5.3 GPM that would provide an instant and endless water supply to a medium-size house. The dimensions for this tankless electric water heater are ‎17 x 17 x 3.75 inches. You can use this water heater for both residential and commercial use. No extra equipment is required for both types of uses.

Specifications Guide

To select the best whole house electric tankless water heaters, the basic thing is first you must have a little knowledge about the specifications or features that you must consider in a tankless water heater. Here we will briefly discuss some of the features that a good water heater has.

1. Consistent water supply

The basic functionality of the water heater is that it must provide a continuous hot water supply and never runs short of hot water. To assure this, you must choose a good brand for yourself. Moreover, the water supplying capacity of the water heater also matters. Every electric water heater is not good for your house because different water heaters have different flow rates. Flow rate usually means the maximum amount of water a water heater can supply in a minute. It is measured in gallons per minute or GPM.

Before choosing a water heater you must know about the GPM value you need. For this, you must know about the number of water supply connections in the house and the GPM value of each one.

For example, if you have a showerhead its GPM value is 1.5-2. For two shower heads, it will be 3 GPM approximately. Keep in mind that not all water connections are in use all the time. Only add those that are mostly in use. One other thing to consider is the inlet water temperature.

The GPM value of the water heater decreases with a decrease in the temperature. So, if you are in an area with extremely cold weather conditions then more likely your water heater will provide less hot water supply. Almost all water heaters provide the chart with GPM value with different inlet water temperatures. Don’t forget to see and match your groundwater temperature to get the exact GPM value before buying an electric water heater.

2. Temperature Range

Temperature range is another factor that counts when you select the best whole house electric tankless water heaters. A good water heater has a vast temperature range of temperature variation. Usually, the electric water heater has a range of 85 F to 135 F. So, choose a water heater that has a greater temperature range.

3. Space Saver

Well, this is one of the advantages of tankless water heaters that they do not take too much space. The reason is quite simple that they are tankless. They do not need to store water to heat it. They directly take water in and instantly heat it and provide it on that same movement. But this does not mean that you have to pick the smaller one for yourself. It depends on your needs. Whole house tankless hot water heaters are comparatively bigger than the ones that are used in small homes and apartments. So, consider your need first and then the size.

4. Energy Efficient

Electric water heaters are more energy-efficient than gas water heaters. It is so because gas water heaters need consistent fuel usage to keep the water all the time even when you are not using it. On the other hand, tankless water heaters use energy when they need to. Because they are heating the water at the time of usage. Moreover, most electric water heaters use modern self-modulating technology to reduce power usage when there is no need for it. that makes most of the electric water heaters about 99% energy-efficient or even more which means there is minimal dissipation of energy.

5. Cost-Efficient

Electric water heaters really save your money. They might seem a bit expensive than the other type of water heaters but you will see the long-term results of buying them. As there is almost negligible loss of energy in the heating process in electric water heaters. Subsequently, fewer units of fuel(electricity) will be used and fewer bills you will receive at the end of the month. Another advantage of having electric water heaters is that they usually do not need to get replaced for a long period.

6. Warranty

Every reliable brand usually offers a warranty on its product. This implies that they are confident about their product. So, choose the one that offers you at least a year of warranty. Many manufacturers offer a leakage warranty and also a warranty on the parts. Prefer that one that offers both warranties. There is quite a high possibility that you are choosing the right brand.

Frequently Asked Questions [FAQs]

The installation process of an electric tankless water heater is very simple and easy. As there is no need to assemble too many parts to install them. All you need is a little bit of plumbing and electrical knowledge. Most of the water heaters need a power supply connection and inlet and outlet water connection. The installation manual can provide additional help.

It is recommended not to try to do it yourself if you do not know how to do so. That can cause any damage to the water heater and can also be dangerous for you. Hire a plumber and an electrician for this. They will do this job more professionally and will also save your time and effort.

GPM value or gallons per minute value is the gallons of water a water connection point uses. To calculate the GPM value you need, you have to check the number of water connections you want your water heater to provide hot water. Now separate those which are in daily and continuous use. Then calculate the GPM value of each connection. If you are not aware of the GPM value of different water connections in your house like the showerhead, dishwasher, sink, etc. then these statistics might be helpful for you.

  • Standard Hand Sink – 0.5 GPM
  • Washing Machine – 1 to 1.5 GPM
  • Kitchen Sink – 1 to 2 GPM
  • Dishwasher – 1 to 2 GPM
  • Water-Saver Shower Head – 1.5 GPM
  • Standard Shower Head – 2.0 GPM
  • BathTub – = 4 GPM
  • Whole-Home – up to 6 GPM

Calculate for yourself and match it with the product you are going to choose.

Yes, it is safe to install them at the place of usage. Most of the water heaters are recommended to be placed near the usage point. Because, the longer the distance between the water heater and the usage point, the more time hot water will take to reach the usage point.

But it does not mean to put it too near where there is a chance of too much unnecessary touch. It could damage the body or can cause some trouble to you as well. Install it near the usage point where you think is safe from unnecessary touch like under your sink or near the showerhead.

If you have chosen the right brand and have installed it at the right place. It can last up to 10 to 15 years, which is surely a long time. There might be some cases where they don’t last too long due to defective parts or careless usage. But these are the exceptional cases. In most cases, it works well for a long period.

No. Electric water heaters do not need any ventilation system to remove extra heat because no combustion takes place in them. Although they might get a little bit heated like all other electrical devices but not to an extent of being harmful. So, you do not need to worry about the ventilation of the electric tankless water heater for whole house.

Bottom Line

The tankless electric water heaters are the best choice because of their size as they are tankless so no extra storage space is required. The other best thing about them is that they use electricity as their energy resource which makes them cost-efficient and more secure. In this article, we have presented you with some best whole house electric tankless water heaters so that you can pick up the best whole house electric tankless water heaters for yourself.

We have discussed all the possible features including the GPM range of all products, material used in manufacturing, the technology used in the water heaters, and their dimensions as well. We have also provided you a guide to understanding which features are suitable for you. All you have to do is to understand and note down your requirements and choose one of these top products that match your requirements. 

These top products are selected by the experts of “The BS Reviews” team. These suggestions are based upon the hundreds of customer reviews all over the world and some personal experiences as well. We will keep working for you to provide you with some best picks and their reviews. If you have any suggestions or any questions related to tankless water heaters, please feel free to ask in the comment section below this article.

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