Eemax EEM24027 Electric Tankless Water Heater: Endless Hot Water, Lower Bills

Update on March 11, 2025, 6:40 a.m.

The Miller family’s mornings were, to put it mildly, chaotic. With three teenagers and two adults all vying for shower time, their aging tank water heater was constantly under siege. Sarah, the youngest, often ended up with a lukewarm, sputtering shower, while Mr. Miller frequently grumbled about the ever-increasing energy bills. One particularly frustrating morning, after Sarah’s shower went completely cold, Mrs. Miller decided enough was enough. She called me, Dr. Emily Carter, a friend and, conveniently, an engineer specializing in water heating technology.

“Emily,” she sighed, “We’re at our wit’s end! The showers are a disaster, and our energy bills are through the roof. Is there a better way?”

I smiled, knowing I had the perfect solution. “There is, Martha,” I said. “Have you ever heard of a tankless water heater?”
 Eemax EEM24027 Electric Tankless Water Heater

The Old Way: Tank Water Heaters and Their Woes

For decades, most homes have relied on tank water heaters. These bulky appliances store a large volume of water, typically 30 to 50 gallons, and constantly heat it to a set temperature, regardless of whether anyone is actually using hot water. This continuous heating leads to what we call “standby loss” – heat energy that escapes through the tank walls and into the surrounding environment. It’s like leaving your oven on all day, just in case you might want to bake a cookie later.

A Revolutionary Solution: Introducing Tankless Technology

Tankless water heaters, also known as on-demand water heaters, represent a fundamental shift in how we heat water. Instead of storing hot water, they heat it only when you need it. Turn on a hot water faucet, and the water flows through the unit, where it’s rapidly heated to your desired temperature. Turn off the faucet, and the heating stops. No wasted energy, no wasted water, and no more cold showers.

The Eemax EEM24027: Efficiency in Action

I explained to Martha that one of the leading models in tankless technology is the Eemax EEM24027. This compact unit, about the size of a small suitcase, packs a powerful punch. It’s designed to provide a continuous supply of hot water, even for demanding households like the Millers’.

The EEM24027’s sleek, blue, stainless-steel design speaks to its focus on efficiency. Its core strength lies in how it provides you with instant, consistent hot water. The unit’s digital temperature display provides constant feedback, allowing you to monitor and control the water temperature with precision. The adjustable temperature feature allows you to set the temperature from a safe and comfortable minimum all the way up to a scalding-hot maximum.
 Eemax EEM24027 Electric Tankless Water Heater

Under the Hood: The Science of Instant Hot Water

So, how does the EEM24027 achieve this seemingly magical feat? It all comes down to a combination of clever engineering and fundamental physics.

  • Flow Activation: At the heart of the EEM24027 is a sophisticated flow sensor. When you turn on a hot water tap, this sensor instantly detects the movement of water. This is the “on” switch for the entire system. No flow, no heating – it’s that simple.

  • Rapid Heating: Once the flow sensor gives the signal, the EEM24027’s powerful heating elements spring into action. These elements, drawing 27,000 watts of power, are designed to transfer heat to the water with incredible efficiency. This is where the principles of heat transfer come into play. Heat moves from the high-temperature elements to the cooler water through a combination of conduction (direct contact) and convection (the movement of heated water). The design of the heating chamber maximizes the surface area contact between the elements and the water, ensuring rapid and efficient heating.

  • Digital Precision: As the water heats up, temperature sensors continuously monitor its temperature. This information is fed to a digital control system, which acts like a tiny, super-fast thermostat. The control system adjusts the power supplied to the heating elements, ensuring that the water exiting the unit is precisely at the temperature you’ve set. This is an example of a feedback control loop, a common engineering principle used to maintain a desired output.

The Thermodynamics of Efficiency: Why Tankless Saves Energy

The key to the EEM24027’s energy efficiency lies in its on-demand operation. Remember that standby loss we talked about with tank heaters? The EEM24027 virtually eliminates it. With a remarkable 99.8% standby power shutoff, the unit consumes almost no energy when hot water isn’t being used. You’re only paying for the energy used to heat the water you actually need, when you need it. This can translate to significant savings on your energy bill, especially in households with high hot water demand.

Think of it this way: a traditional tank heater is like a constantly simmering pot on the stove, while a tankless heater is like a high-tech electric kettle that boils water only when you press the button. Which one do you think uses less energy?

Beyond the Bill: Other Benefits of Tankless

The advantages of the EEM24027 extend beyond just energy savings. Its compact size (17 inches wide and only 3.75 inches high) frees up valuable space in your home. Imagine reclaiming that closet space currently occupied by a bulky tank heater! And, of course, there’s the joy of endless hot water. No more rationing showers or waiting for the tank to reheat. Finally, by reducing energy consumption, the EEM24027 also contributes to a smaller carbon footprint, making it a more environmentally friendly choice. a more environmentally friendly choice for heating water. The reduced energy demand translates directly into fewer greenhouse gas emissions, helping, in a small but significant way, to combat climate change.
 Eemax EEM24027 Electric Tankless Water Heater

Installation Considerations: Getting it Right

While the Eemax EEM24027 offers numerous advantages, it’s important to note that proper installation is crucial. This isn’t a typical DIY project. Due to the high power requirements (27kW at 240V), the EEM24027 needs a dedicated electrical circuit with three 40 AMP double-pole breakers and 3 x 8 AWG wiring. This ensures the unit operates safely and efficiently, and it’s essential to comply with all local electrical and plumbing codes. That’s why I always recommend that homeowners hire a licensed electrician and plumber for the installation. It’s an investment that guarantees both safety and the long-term performance of the unit.

The Future of Hot Water.

The Eemax and other tankless systems are helping set the tone for Water Heaters in the future.
Manufacturers are looking for ways to make their systems, smaller and more efficient, but also looking at ways to expand the smart controls. Such as monitoring usage, and leak protection.

Back at the Miller household, the transformation was remarkable. The morning rush became a smooth, stress-free routine. Sarah enjoyed long, hot showers without a hint of cold water. Mr. Miller was thrilled to see a noticeable drop in their energy bills. And Mrs. Miller? She was simply happy to have a peaceful, hot-water-abundant home.

The Eemax EEM24027 isn’t just a water heater; it’s a testament to how smart engineering and a focus on efficiency can improve our daily lives while also benefiting the planet. It’s a prime example of how we can embrace technology to live more comfortably and sustainably. And who knows, perhaps the next generation of tankless heaters will even learn our individual preferences and adjust the water temperature automatically! The possibilities are, much like the hot water supply from an Eemax, seemingly endless. So if you’re battling with an outdated, inefficient water heater, consider exploring the world of tankless technology. You might just find yourself, like the Millers, enjoying the endless shower – and the endless savings.