Eemax Tankless Water Heaters: Benefits and Things to Look For

Eemax electric tankless water heaterEemax electric tankless water heater

Are you tired of running out of hot water mid-shower or burdened by high energy bills from traditional water heaters? If so, it might be time to consider Eemax tankless water heaters, a leading manufacturer known for their energy efficiency, durability, and cutting-edge features.

With over 30 years of experience in the industry, Eemax offers a wide range of tankless water heaters suitable for households of all sizes, from small apartments to large homes. According to their website, Eemax tankless water heaters can reduce water heating costs by up to 50% and have a lifespan three times longer than traditional water heaters.

In this article, we'll explore the key features and benefits of Eemax tankless water heaters and help you determine if they're the right choice for your home. Unlike traditional water heaters, Eemax tankless models heat water on demand, providing an unlimited supply of hot water for point-of-use and whole-house applications, such as homes, apartments, cottages, and offices. These units can also operate as remote units or boosters, supporting both tank-type and tankless units and ensuring quick delivery of hot water.

emergency plumber

Eemax tankless water heaters: Things to consider

Models review

While the Eemax manufacturer carries many different types and sizes of water heaters, for both home and commercial applications, only seven tankless and electric models are available for domestic water heating, all coming from the HomeAdvantage II series:

  • HA008240
  • HA011240
  • HA013240
  • HA018240
  • HA024240
  • HA027240
  • HA036240

Main features

Nice look, strong material

Although the Eemax tankless water heater is designed primarily for its functionality, it also boasts a modern and stylish look, making it a desirable addition to any home. Whether installed in the kitchen or bathroom, this sleek device blends nicely into the surrounding cabinets or wall, adding a touch of elegance to the space.

It's worth noting that Eemax tankless water heaters are built exclusively for indoor use. However, they are still designed with high-quality materials such as stainless steel casings that provide longer element protection and extend the life of the unit.

Small and compact

The compact and lightweight design of Eemax tankless water heaters makes them easy to handle and install, with the added benefit of saving floor space in your home. These units can be mounted on the wall, under the sink, or inside a cabinet, providing greater flexibility in placement.

For instance, the smallest Eemax unit, HA008240, measures 11.5" x 8" x 3.75" and weighs only 4.75 lbs, while the largest model, HA036240, is 17" x 21" x 3.75" and weighs 17.4 lbs, capable of producing up to 36 kW of power. When compared to standard tank-type units that can have a diameter of 22" and height of over 60", the space and time savings for handling and installation are significant.

The smallest tankless unit from Eemax comes with one heating element, while larger models can have up to four, providing up to 9 kW of power per element. In comparison, conventional tank-type units typically come with two heating elements, each providing up to 6 kW of power.


The smallest Eemax unit, which produces 8 kW of power, is easy to install since it comes with an electric cord. However, the larger models, which can produce up to 36 kW of power, require hardwiring during installation. All models require 240V power supply.

In terms of plumbing, larger models with 18 kW and above have bottom water connections, while smaller models have side connections.


Eemax water heaters are equipped with immersion-type heating elements made of copper, which heat water with 99% energy efficiency, as all the power goes towards heating the water. This means there is no standby heat loss, which is common in tank-type models, and water is heated instantaneously.

Advanced control

Eemax tankless water heaters incorporate several innovative features, including advanced water flow, temperature sensors, and computer logic controls. These features work together to ensure power modulation on the heating elements, maintaining stable water temperature with minimal fluctuation and as close as possible to the set value.

The units operate simply - heating elements heat water instantly, using the flow switch to activate the unit when there is demand for hot water. While primarily recommended for point-of-use applications, models with higher power can also be used for multiple fixtures, larger buildings, and homes - with a dedicated unit for each fixture.

Thanks to thermostatic control of the water temperature and adjustable settings, the units provide stable water temperature with minimal fluctuation, avoiding "cold water sandwich" effect, and offering increased comfort. With an adjustable temperature dial, users can change the temperature from a minimum of 80 F to a maximum of 140 F.


Eemax models prioritize safety, and the risk of scalding burns is minimized through the scald prevention system and computer-controlled micro-processing temperature control. These features ensure that the water temperature remains at safe levels.

Additionally, Eemax models are equipped with high-quality features that reduce calcification, liming, and sedimentation. This ensures that the Ni-Chrome heating element can provide optimal heat transfer and durability for years to come. Furthermore, the high-temperature limit switch protects the element from burnout, ensuring the longevity of the unit.

Selecting the right model

To ensure that you purchase the right Eemax on-demand water heater, it is essential to gather specific information, such as the hot water usage required for your household fixtures and the incoming water temperature in your area. Based on these factors, you can calculate the necessary flow rate (in GPM) and heating power (in kW) required for the unit.

The specifications of the Eemax tankless water heaters can vary, with the smallest model HA008240 having a heating power of 8 kW and producing up to 4.8 GPM, while the largest model HA036240 with a power of 36 kW can produce up to 8 GPM.

How much of hot water is needed per application?

  • Shower – 2 GPM
  • Kitchen sink – 1-2 GPM
  • Bathtub – 4 GPM
  • Dishwasher – 1-2 GPM
  • Washing machine 1-1.5 GPM

Example: If you need a hot water flow of 4 GPM and a temperature rise of 45 F, the recommended unit will need 24 kW of heating power - HA024240. 


Eemax tankless water heaters offer several advantages over traditional water heaters, including energy efficiency, compact design, and instant hot water supply. These units come in different sizes and power options suitable for various residential and commercial applications.

However, before purchasing an Eemax unit, it is crucial to assess the hot water demand and incoming water temperature to ensure that the unit can meet your needs. It is also important to note that larger units may require costly electrical rework, which may require professional installation.

Moreover, Eemax tankless water heaters are relatively expensive, ranging from $200 to almost $1000. Despite these limitations, many users have reported that Eemax tankless water heaters are an excellent investment that can replace old water heaters, providing endless hot water supply without any wait time. The reviews of users who have bought larger units of 24 kW and up have noted that these units can easily replace old 40 and 50-gallon water heaters, providing enough hot water for the entire household.

How to contact Eemax:

Official website: eemax.com

You might like these