How Instantaneous Water Heaters Work

How Instantaneous Water Heaters Work

by Eccotemp Europe

Modern instantaneous water heaters, often referred to as on-demand or instantaneous water heaters, present a sophisticated alternative to traditional water heating systems. Unlike conventional water heaters that store a large volume of hot water for later use, instantaneous models heat water only at the moment it is needed, triggered by the activation of a hot water tap. This approach not only saves energy but also frees up valuable space in your home, as there is no need for a bulky storage tank. Among the various types available, Eccotemp's instantaneous water heaters are particularly renowned for their reliability and high efficiency.

This discussion will delve into the mechanics of tankless water heaters, illustrating how they provide hot water on demand without the delays associated with traditional systems. It will highlight the advantages of Eccotemp SH12, celebrated for its smart features and energy-saving capabilities. Transitioning from a traditional water heater to a tankless model can significantly enhance your daily convenience by ensuring a constant hot water supply, eliminating the wait times and energy waste inherent in maintaining a reservoir of pre-heated water. Embrace the innovation of tankless water heaters to experience uninterrupted hot water access while optimizing energy usage.

Why Choose Instantaneous Water Heaters

Instantaneous water heaters offer several compelling reasons to choose them over traditional water heating systems. One key advantage is their energy efficiency. Unlike traditional water heaters that keep a large tank of water constantly heated, instantaneous water heaters only heat water as needed. It means they don't waste energy keeping water hot when it's not being used, resulting in lower energy bills and reduced environmental impact.

Another reason to choose instantaneous water heaters is their space-saving design. Traditional water heaters can take up a lot of space, especially if they have a large storage tank. Instantaneous water heaters, on the other hand, are much smaller and can be mounted on a wall, freeing up valuable floor space in your home. Additionally, instantaneous water heaters provide an endless supply of hot water. Since they heat water on demand, there's no risk of running out of hot water, even if multiple taps are running simultaneously. This makes instantaneous water heaters ideal for large households or families with high hot water demands. Overall, the energy efficiency, space-saving design, and endless hot water supply make instantaneous water heaters an attractive choice for many homeowners in European countries.


Understanding How Instantaneous Water Heater Works

Instantaneous water heaters, like the Eccotemp SH12 SMARTHOME model, are designed to provide hot water on demand without storing it in a tank. They work by heating water instantly as it flows through the water heater, either using gas or electricity. It means you get hot water whenever you need it, without waiting. In European homes, these heaters are becoming popular because they save energy and space. The Eccotemp SH12 offers advanced features like smart controls through an app, voice commands, and an energy-saving ECO mode, making it a convenient and efficient choice for modern households.

Liquid Propane Tankless Water Heaters: A Modern Solution

Liquid propane tankless water heaters, exemplified by models like the Eccotemp SH12, represent a cutting-edge approach to home water heating. Unlike natural gas heaters, which are common in some countries, these water heaters utilize liquid propane as their fuel source. When activated, the Eccotemp SH12 ignites a burner to heat a heat exchanger, providing rapid and efficient hot water delivery.

The operation of liquid propane instantaneous water heaters is both simple and efficient. As water flows through the water heater, it passes over the heat exchanger, where it is rapidly heated to the desired temperature. This on-demand heating method eliminates the need for a storage tank, unlike traditional water heaters, which continuously maintain a large volume of hot water. By heating water only when needed, liquid propane instantaneous water heaters minimize standby heat loss, ensuring that hot water is readily available without the energy waste associated with conventional systems.

What is MBAR, and Why is it Significant?

MBAR, an abbreviation for Millibar Pressure Unit, is crucial for measuring low-range gas pressure, particularly in the operation of gas-powered devices. Essentially, one millibar equates to one-thousandth of a bar, representing the pressure exerted by one Newton per square meter. This unit of measurement is also extensively employed in meteorology for assessing atmospheric pressure.



Sustainable Solutions for Modern Homes

As homeowners prioritizes sustainability and efficiency, Eccotemp SH12 and similar liquid propane tankless water heaters are gaining popularity. The Eccotemp SH12 is available in three gas pressure options (30MBAR, 37MBAR, and 50MBAR), offering flexibility for installation in various European countries. Its compact design, coupled with advanced features such as smart technology and energy-saving modes, makes it a convenient and sustainable choice for households. By providing instant hot water while minimizing energy waste, Eccotemp SH12 Instantaneous Water Heaters align with the increasing demand for eco-friendly and efficient home appliances, ensuring a reliable hot water supply without unnecessary energy consumption.

Key Components of Liquid Propane Instantaneous Water Heaters

  • Gas Burner: In gas instantaneous water heaters, such as those made by Eccotemp, the gas burner is the main component that heats the water. When you turn on the hot water tap, the gas burner ignites instantly, heating the water as it flows through the water heater. This method ensures that hot water is available immediately, without the wait time typical of traditional water heaters that store hot water in a tank. Eccotemp gas instantaneous water heaters use this efficient gas burner system to provide a steady and continuous hot water supply. It means you can enjoy hot water whenever you need it, whether for a shower, washing dishes, or doing laundry, without worrying about running out. The on-demand heating mechanism not only enhances convenience but also improves energy efficiency, as it eliminates the need to constantly keep a large volume of water heated. It makes Eccotemp gas instantaneous water heaters a practical and reliable choice for ensuring a consistent and energy-efficient hot water supply in your home.

  • Heat Exchanger: In instantaneous water heaters, the heat exchanger is a vital part that helps transfer heat from the burner to the water. Located at the core of the water heater, the heat exchanger is designed to heat water efficiently by maximizing the transfer of heat and minimizing energy loss. When you turn on a hot water tap, cold water flows into the heat exchanger, where it quickly absorbs heat from the burner, ensuring the water reaches the desired temperature almost instantly. Unlike traditional water heaters that store and constantly reheat a large tank of water, instantaneous water heaters heat water only when needed, which makes them more energy-efficient. This on-demand heating system saves energy and also provides an endless supply of hot water, as the water is heated as it flows through the water heater. The efficiency and reliability of the heat exchanger are crucial for the performance of instantaneous water heaters, making them an excellent choice for homeowners who want a continuous and efficient hot water supply without the bulk and energy waste of traditional systems.

Eccotemp Gas Instantaneous Water Heaters

Eccotemp Gas Smart Home Instantaneous Water Heaters leverage cutting-edge technology to provide efficient and dependable hot water solutions. Unlike traditional water heaters, these heaters utilize a gas burner to heat water instantaneously as it flows through a heat exchanger. When a hot water tap is activated, the gas burner ignites promptly, elevating the water temperature to the desired setting. This rapid and efficient process ensures a continuous and reliable hot water supply, catering to the needs of households of varying sizes. Whether residing in a compact apartment or a spacious home, Eccotemp gas instantaneous water heaters are designed to meet diverse hot water demands effectively. Their ability to provide hot water on demand makes them a practical choice for modern households, where convenience and reliability are paramount.

The design of Eccotemp SmartHome Instantaneous Water Heaters is meticulously crafted to deliver optimal performance and maximize energy efficiency. These water heaters operate by heating water only when it is needed, thereby eliminating the energy waste associated with traditional water heaters that continuously maintain a reservoir of hot water. The absence of a storage tank in Eccotemp instantaneous water heaters significantly reduces standby heat loss, which is a common inefficiency in conventional water heating systems. This innovative design not only ensures a ready supply of hot water but also contributes to substantial energy savings and lower operational costs. Eccotemp SmartHome Instantaneous Water Heaters stand out for their eco-friendly approach and advanced technology with voice command features, providing a sustainable solution that reduces energy consumption and minimizes environmental impact. Whether in a small apartment or a large household, these heaters offer a consistent hot water supply while promoting energy conservation and cost-effectiveness, making them an excellent choice for environmentally conscious homeowners.

Key Features and Benefits of SmartHome Instantaneous Water Heaters

Key Features

  • Smart Technology Integration:
    • Eccotemp Smart App: Allows remote control over power settings, temperature adjustments, and usage monitoring from any location via the app available on Google Play or the Apple App Store.
    • Voice Command Compatibility: Integrates with Amazon Alexa and Google Assistant for hands-free operation, enabling commands such as "Alexa, turn my water heater to 43 degrees Celsius."

  • High Efficiency and Performance:
    • 15 Liters Per Minute Flow Rate: Capable of delivering a steady and substantial flow of hot water, accommodating the demands of large households or multiple simultaneous hot water uses.
    • Variable Power Range: Operates within a power range of 3.98–23.7 kW, providing flexibility and efficiency depending on hot water needs.

  • Advanced Control and Monitoring:
    • Energy Usage Statistics: Tracks gas, water, and electricity consumption, allowing users to personalize and evaluate their usage costs daily or monthly.
    • Scheduling Capabilities: Enables setting schedules for water heating to align with user routines, optimizing energy usage.

  • Innovative Design and Safety Features:
    • Forced Air Exhaust System: Includes a state-of-the-art exhaust system paired with a 6.35 cm (2.5 inch) horizontal vent kit for safe indoor installation.
    • Eco Mode: Reduces energy consumption during periods of lower hot water demand, particularly in the summer months.

  • Wide Compatibility and Certification:
    • CE Certified: Approved for use in multiple countries across Europe, ensuring compliance with regional safety and efficiency standards.
    • Wi-Fi and Wireless Remote Control: Provides flexibility in operation, accommodating scenarios where Wi-Fi may not be available through the included remote control.


  • Convenience and Ease of Use:
    • Remote Access and Control: The ability to adjust settings and monitor usage remotely provides unmatched convenience, allowing users to manage their water heater without being physically present.
    • Voice-Activated Commands: Enhances the user experience by enabling effortless control through voice commands, adding a layer of modern convenience.

  • Energy and Cost Efficiency:
    • On-Demand Heating: Only heats water when necessary, eliminating the constant energy drain associated with traditional tank heaters.
    • Usage Monitoring: Helps users keep track of their energy consumption and costs, promoting more mindful and efficient use of resources.

  • Reliable and Continuous Hot Water Supply:
    • High Flow Rate: Ensures that even during peak usage times, such as multiple showers or simultaneous appliance use, the hot water supply remains consistent and reliable.
    • Adaptability to Household Size: Suitable for various living situations, from small apartments to large homes, providing a versatile solution for different needs.

  • Enhanced Safety and Durability:
    • Advanced Error Detection: The smart technology includes features to detect and alert users to potential issues, ensuring safety and reducing the risk of malfunctions.
    • Anti-Freeze Protection: Built-in protection against freezing temperatures ensures the water heater’s longevity and reliable operation even in colder climates.

  • Environmental Benefits:
    • Reduced Energy Waste: By only heating water as needed, the instantaneous water heater significantly cuts down on energy waste, contributing to a lower carbon footprint.
    • ECO Mode: Further enhances energy savings by adjusting the heating intensity based on seasonal needs, promoting a more sustainable approach to hot water usage.

The SMARTHOME 15 LPM Indoor Liquid Propane Instantaneous Water Heaters, or SH12 models, offer a comprehensive package of advanced technology, high performance, and user-friendly features, making them a superior choice for modern households looking to enhance their hot water systems with smart, efficient, and environmentally friendly solutions.

Factors to Consider When Choosing a Tankless Water Heater

Selecting the right instantaneous water heater involves considering various factors to ensure optimal performance and compatibility with your home's requirements. Key considerations include:

  1. Heating Capacity (BTUs): Assess the heating capacity of the gas instantaneous water heater, typically measured in BTUs, to guarantee it can adequately cater to your household's hot water requirements, particularly during peak usage times. This evaluation ensures that the water heater can consistently deliver sufficient hot water to meet your needs without experiencing any interruptions or delays.

  2. Flow Rate: It's crucial to ascertain the necessary flow rate by considering the simultaneous usage of various hot water appliances, including showers, faucets, and dishwashers. This assessment ensures that the selected water heater can adequately meet the demand for hot water across multiple points of use in your household without compromising on performance or efficiency.

  3. Energy Efficiency: Prioritize energy efficiency when selecting a gas instantaneous water heater, focusing on models with high efficiency ratings to assess their potential for long-term utility savings. Opting for an instantaneous water heater with exceptional efficiency can minimize energy consumption and lower utility costs over time, making it a wise investment for your home's hot water needs.

  4. Sizing: When selecting an instantaneous water heater, it's crucial to select the appropriate size to accommodate your household's requirements effectively. Consider the various factors, including the number of occupants in your home, the frequency of simultaneous water usage, and the desired hot water temperature. By considering these aspects, you can ensure that the chosen tankless water heater meets your household's hot water demands efficiently and reliably.

  5. Installation Requirements: When contemplating a gas instantaneous water heater, factor in the installation requirements and determine whether professional plumbing services are necessary. Ensuring the proper setup and functionality of the water heater is crucial for its effective operation. By assessing the installation process beforehand and seeking professional assistance if needed, you can guarantee a smooth and efficient installation process, ultimately maximizing the performance and longevity of your instantaneous water heater.  

  6. Maintenance: Regular maintenance is essential to keep your instantaneous water heater operating efficiently. This includes periodic descaling to prevent mineral buildup and ensure uninterrupted performance. Homeowners can optimize their instantaneous water heater investment by prioritizing maintenance. This proactive approach ensures a reliable and efficient hot water supply throughout the system's lifespan, maximizing the benefits of the investment.

    Transitioning to an instantaneous water heater is a smart move to boost your home's comfort and energy efficiency. Instantaneous water heaters provide hot water on demand, eliminating the need for a storage tank and reducing energy waste.

Addressing Potential Challenges

While Eccotemp Instantaneous Water Heaters offer numerous benefits, it is essential to acknowledge and address potential challenges associated with their usage:

  1. Flow Rate Management: Effective flow rate management is essential when selecting a gas instantaneous water heater to ensure it aligns with your household's hot water requirements. Proper sizing is paramount to preventing flow rate issues, as inaccuracies can result in inadequate hot water supply during peak usage. Careful planning and adjustment are necessary to avoid potential challenges and ensure consistent and reliable hot water delivery throughout your home.

  2. Performance Issues Due to Ventilation: Adequate ventilation is vital to ensuring the optimal performance of gas-powered instantaneous water heaters. Blocked vents can hinder efficiency and create safety risks, emphasizing the necessity for routine maintenance and inspections. By prioritizing proper ventilation and conducting regular checks, homeowners can mitigate the likelihood of performance issues and maintain the safety and efficiency of their tankless water heating systems.

  3. Mineral Buildup Prevention: Like all water heating systems, gas instantaneous water heaters are susceptible to mineral buildup over time, which can affect performance and efficiency. Implement a regular maintenance schedule, including water filter replacements, to mitigate mineral buildup and ensure optimal operation.

  4. Cost Considerations and Long-Term Savings: While the initial cost of a gas instantaneous water heater may be higher than that of a traditional water heater, the long-term savings in energy costs and maintenance expenses justify the investment. Eccotemp SmartHome Instantaneous Water Heaters boast high efficiency ratings and durable construction, offering significant savings over their lifespan. Additionally, the compact design of these water heaters saves space and enhances the aesthetic appeal of your home. By factoring in installation costs and energy savings, homeowners can make a cost-effective choice that delivers value for years to come.


Embrace the Future of Hot Water with Eccotemp

Eccotemp stands as a beacon of innovation and dependability within the world of hot water solutions, continuously revolutionizing the industry landscape with its diverse range of gas instantaneous water heaters. This commitment to pushing boundaries is evident in the seamless integration of state-of-the-art technology with unwavering reliability, offering homeowners an unparalleled hot water experience defined by both efficiency and convenience.

Whether you're in the process of upgrading your current water heater or embarking on a fresh construction venture, the advantages of an Eccotemp SmartHome Instantaneous Water Heaters are worth considering. Bask in the liberation of never-ending hot water, the effectiveness of gas-powered heating, and the assurance derived from investing in a brand known for its reliability and excellence.


Question: How do instantaneous water heaters provide hot water instantly?
Answer: Instantaneous water heaters heat water directly as it flows through them without a storage tank. When you turn on a hot water tap, cold water travels through a pipe into the water heater, where a gas burner heats the water instantaneously, delivering hot water on demand.

Question: How do I install an instantaneous water heater?
Answer: For proper installation of an instantaneous water heater, it's advisable to enlist the services of a professional plumber. They'll ensure the water heater is correctly positioned, connect water and gas lines if needed, and adhere to local building codes for safe and efficient installation.

Question: What does an instantaneous water heater look like?
Answer: An instantaneous water heater is typically compact and wall-mounted, resembling a small box. It doesn't have a bulky storage tank, distinguishing it from traditional water heaters. It may have control buttons or a digital display for adjusting temperature settings.


Embark on a journey towards enhanced convenience, efficiency, and uninterrupted access to hot water with Eccotemp Instantaneous Water Heaters. Through the incorporation of groundbreaking technology and advanced functionalities, homeowners can revel in a dependable, energy-efficient, and environmentally friendly solution to meet their household's hot water demands. With Eccotemp SmartHome Instantaneous Water Heaters, not only do you gain instant hot water access as needed, but you also unlock the perks of remote control and monitoring via the Eccotemp Smart App. This level of convenience empowers homeowners to tailor their hot water systems to their precise preferences and usage patterns, optimizing efficiency and comfort.

Bid farewell to the constraints of conventional water heating systems and usher in a new era of efficiency and cost savings with Eccotemp Tankless Water Heaters. With their contemporary design, sophisticated features, and long-term financial advantages, these innovative appliances guarantee years of contentment and environmentally conscious living. Seize the opportunity today to switch over and elevate your home's hot water experience with Eccotemp.