Eemax Tankless Water Heater Reviews [2020]

| Last Updated: May 2, 2021

Exploring the options for water heaters is like taking a plunge in the Atlantic to find your favorite shark.

The market is saturated with all kinds of real and fake reviews about tankless water heaters, and even if you find a trusted brand like Eemax with several tankless water heater options, there are so many choices that your head will start spinning.

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Here, we have reviewed some of the best Eemax tankless water heaters to make your choosing easier. 

  • Promises the targeted audience an unceasing flow of hot water at the rate of 7.5 gallons per minute
  • Designed with copper heat exchanger along with brass tops to ensure maximum efficiency
  • Overall look of the heater is also compact, so it can easily be stored in any corner of the house without looking unpleasant
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  • Designed with a copper heat exchanger that has a brass top which gives you hot water in a matter of minutes
  • Also equipped with an LED screen as well as easy control knobs to check and set the temperature
  • It’s also very reliable and durable for up to 20 years, and it will still work as good as new
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  • Best for the money
  • Fitted with copper heat exchanger along with brass tops to give you instantly warm water
  • It also comes with an LED display of digital temperature
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  • Best Eemax Tank-less Water Heater
  • Easy temperature knobs are best for setting the perfect as well as preferred temperature
  • A consistent flow of warm water with 99% efficiency
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  • Best Eemax Electric Tankless Water Heater
  • Equipped with a 1-degree increment knob that helps you keep the perfect temperature
  • Comes with changeable temperature display ranging from 80 to 140 degrees
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How Does Eemax Compare to the Competition?

Eemax has been in the business for 25 years, and for the past quarter of a century, have provided the target market with the best water heaters. There are many reasons for choosing Eemax over its competitors. Let’s explore why Eemax tankless water heaters are better than the competition.

Eemax is Energy Efficient

Even with an efficient, older traditional water heater, you tend to save 60% energy, but with Eemax tankless heaters, you save up to 80%. This helps you save a considerable amount on your energy bill. You only heat what you need, so there is no extra heating involved, which is why you get to save 20% more than traditional water heaters with Eemax.

Eemax is Durable

The trusted brand gives you more than 20 years of durability, while traditional water heaters come with the durability of 8 to 12 years. Eemax tankless heaters are constructed with high-quality material that is less inclined to get lime-scale or rust buildup.

Advance Control

Eemax tankless water heaters are innovative and fitted with temperature sensors and advanced water flow, as well as computer logic controls. With these, you can get the perfect temperature, as well as avoid temperature fluctuations. You can easily change and set your desired temperature with one-degree increment temperature knobs. All models are also equipped with an LED display for a ready read of the exact temperature.

Comparison of the Best Eemax Tankless Water Heaters

For 25 successful years, Eemax has been working to provide the target audience with the best and toughest water heaters. The most promising thing about Eemax is that all the models they manufacture are brilliantly designed. They are compact, as well as efficient. You can never go wrong with an Eemax heater.

Model Name

Unit Size (L"xW"xH")

Energy Efficiency

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Flow Rate (Gallons Per Minute)

Cost of Unit Only


11.5x 8x3.75




17x 17x3.75





17x 17x 3.75





17x 21x 3.75





11.5x8x 3.75




Quick Take: Best Eemax Tankless Water Heaters

These are our recommendations for the best Eemax tankless water heaters:

  1. Eemax HA036240
  2. Eemax HA024240
  3. Eemax HA027240

Review of the Best Eemax Tankless Water Heater

Running out of hot water for sinks or bathrooms isn’t an uncommon thing in a big household with a huge family. To combat this, Eemax tankless water heaters are the best option. Here are our favorite picks that will solve your cold water issues forever.

Best Overall:
 Eemax HA036240


  • Easy control knobs to set preferred temperature
  • Water heater gives a constant flow of 7.5 gallons/min
  • Equipped with a digital temperature display
  • Model comes with a durability promise that is also the mark of the brand
  • Can provide you with temperatures between 80 to 140 degrees Fahrenheit at one knob turn


  • Takes some time to heat up
  • Professional help required for installation
  • Reduced water when used simultaneously in two or more bathrooms

Why it Stands Out to Us

First of all, the design of the tankless water heater is the most prominent thing when it comes to Eemax water tankless water heaters. You can easily install the unit, conceal it in any part of the house, and forget it’s even there. Even in plain sight, the design looks pleasant. It provides a flow rate of eight gallons per minute, which is pretty impressive. You can easily utilize the hot water in a couple of bathrooms simultaneously without ceasing the flow or temperature of the hot water. Another great point about this is the temperature doesn’t drop; you can take the longest shower ever without hot water running out on you.

Bottom Line

Existing without hot water is a nightmare no one faces willingly, so if you are looking for the perfect tankless water heater, this Eemax model should be at the top of your list. It’s one of the most powerful electric models by Eemax. This model will give you unceasing 7.5 gallons/minute hot water flow. You can spend a couple of hours under a hot shower without the hot water running out. Using it simultaneously does reduce the flow, but it doesn’t affect the temperature of the water. The compactness, as well as the smart design, makes it possible to conceal the unit anywhere in your house.

Eemax HA024240


  • Durable design that will last decades
  • Extremely compact and easy to conceal
  • Easy to set the temperature with control knobs
  • Easy to read the temperature with the LED screen
  • Consistent hot water to two or three bathrooms at once


  • Professional installation needed
  • The flow is not consistent when a couple more taps are open

What Recent Buyers Report

This is the flagship model, so it’s bound to outrun all the others. This tankless heater is so durable that you will have a hard time getting rid of it. One more feature that stands out is the compact size of the water heater, you can mount in on any wall and it won’t look unpleasant.

It also comes with a digital temperature display, so you can always tell the temperature it is set at, there will be no guessing with this model. Furthermore, you can easily set the temperature with a knob that adjusts in one-degree increments.

Bottom Line

Eemax may be a relatively new brand in the market, with only 25 years under its belt, but it has risen to where no other brand is at the moment. The brand gives you durability, as well as reliability, and promises to serve you for decades without any repairs. The compact design, as well as the copper brass internal design, gives you perfectly hot water within minutes.

With easy control knobs, as well as the temperature display, you can make sure your preferred water temperature is perfectly set without a doubt. Eemax gives you 99% efficiency with a trusted brand backing.

Best for the Money:
 Eemax HA027240


  • 20 years plus of ensured durability
  • Compact and smart design for 90% space saving
  • Easy-read digital display to check the temperature
  • Reduced carbon footprint with energy-saving technology
  • Convenient temperature knobs to set the perfect temperature


  • May require hiring a professional
  • Installation may require an additional circuit
  • Water flow reduces with simultaneous use in two or more bathrooms

Why it Stands Out to Us

Eemax may be new, but it has already made a name for itself in the market by providing the best of the best models. Each model comes with innovative features to make your life extremely easy.

For instance, this one has a temperature dial to set the perfect temperature as per your preference as well as a digital temperature display so you can keep an eye on your preferred temperature. This model is designed with copper and brass wires for instant heating and has a very compact build. Plus, it provides around-the-clock hot water whenever you need it.

Bottom Line

With Eemax, you can be assured that you have bought the best from the highly saturated market of tankless water heaters. The brand comes with a reliable and durable promise of 20 plus years. Not only this, but their designs are compact and beautiful so they will not look ghastly when mounted on your walls.

The internal working of the heater is as innovative as the outer design. The brass and copper technology gives you 99% efficiency with an instant warm-up, so you get hot water within minutes of opening the tap. This model also comes with a digital display to help you set and check the temperature without any hassle.

Best Eemax Tankless Water Heater:
 Eemax HA013240


  • Comes with a digital temperature display
  • Instant and constant flow of warm water
  • Equipped with the easy-to--set temperature knob
  • Durable for at least 20 years, ensured by the brand
  • Saves you time, as well as the effort of heating water for every shower


  • Requires high AMPs
  • Might need to hire professionals for installation
  • Water pressure may reduce with simultaneous use in more than one bathroom

Why it Stands Out to Us

This powerful tankless water heater is yet another innovative model of Eemax that promises you instant hot water within minutes. It comes with a promise of 20 years of durability. The model comes with an LED display for temperature checks and knobs for temperature settings. The compact design is just perfect for small spaces.

The heater runs on 13 kilowatts, giving you perfectly-heated water with every use. This particular model will give you and your family an uninterrupted flow of three gallons per minute, so you can have long baths and showers without running out of hot water.

Bottom Line

With this model, you get consistent, as well as sufficient, hot water. Whether you are looking for hot water for showers or washing, it will not disappoint you for years. Easy LED temperature display will tell you the exact temperature every time so you get the perfect temperature every time.

You can easily get hot water in two or more bathrooms without a reduction in temperature. This model is more powerful than others, as it runs on 13 KW power. This ensures that your water will get warm earlier than other models.

Best Eemax Electric Tankless Water Heater:
Eemax HA011240


  • Comes with a digital temperature display
  • No soldering required for mounting the unit
  • A consistent flow of warm water within minutes
  • The heater keeps Legionella bacteria from growing
  • Compact design for small spaces and easy concealment


  • Not suitable for heavy-duty usage
  • The warm-up may take some time
  • Ebbing water flow with simultaneous use

Why it Stands Out to Us

Eemax is known for its innovative tankless water heaters, and this model is no different. The model is perfect for giving you hot water for every shower and bath you take, no matter how long. It also comes with an easy-to-adjust temperature knob, as well as an easy-to-read display unit that tells you the exact temperature at all times.

The compact design of the electric tankless water heater lets you set it in any corner of the house without looking unpleasant. It can fit in the smallest nook of your house and still work like a charm.

Bottom Line

This model comes with some great features like 240 volts and 11 KW power, as well as a compact design with a lightweight body. The flow rate on this model is around three gallons per minute, which is great for long showers, as well as extensive washing. It also comes with adjustable knobs for one-degree increment temperature settings.

It also comes with an LED temperature display, so you never have to guess your water temperature ever again. Eemax is one brand that is bound to make your life easier with innovative technology. The water heater is guaranteed to last up to 20 years.

What Kind of Warranty Does Eemax Offer?

Eemax has been in the business for about 25 years, and in these short but successful years, Eemax has earned the loyalty and trust of its target audience. The consumers are promised durability of 20 plus years.

Eemax is one brand that is known for its 20-year lifespan. The customer care service of Eemax is extremely amiable, listening, and catering to all your complaints and needs and provides the best, most reasonable solutions.

All tankless models come with a limited warranty and a warranty explaining manual, as well. You can also check with customer care to get help with any repair and maintenance issues.

Who is Eemax?

Eemax is a dark horse among other tankless water heater brands. Albeit the fact that the brand is comparatively new, the company has gathered a loyal consumer base. The company started in 1988 with the product line of compact and innovative tankless water heaters for commercial applications. These water heaters ranged in size from .5 GPM to 1.5 GPM. It didn’t take much time for the company to soar to the mightiest skies with their durable and innovative tankless water heaters.

In 2018, Eemax celebrated its 30th anniversary of being the most successful, as well as most reliable tankless water heater brand for commercial and residential use.


Installing a water heater is essential, whether it’s a commercial space or residence. Tankless water heaters are way more efficient than traditional ones, and when it comes to the most trusted company, there is none better Eemax. With Eemax, you get 99% efficiency, as well as instant warm water, within minutes of opening the tap.

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My name is Bob Wells and I am a retired HVAC tech from Washington state. I am currently retired and no longer do much with HVAC, however, I feel like I have a lot of knowledge in the subject and I wanted to create a website where I could talk about what I've learned and help upcoming HVAC techs. Find more info about me and HVAC Training 101.