Unraveling Tankless Water Heaters: Understanding How They Work

Unraveling Tankless Water Heaters: Understanding How They Work

Tankless water heaters, also known as on-demand or instantaneous water heaters, represent a significant departure from traditional hot water systems. Unlike their counterparts, tankless water heaters do not store hot water; instead, they heat water only when needed, offering a range of benefits like energy efficiency, space-saving design, and endless hot water supply.

Among the diverse array of tankless water heaters available on the market, gas-powered models, particularly those from Eccotemp, have gathered attention for their reliability and performance. In this comprehensive guide, we'll delve into the workings of tankless water heaters, explore the benefits of gas-powered models, and understand how to navigate the transition to this modern hot water solution.

The Evolution of Water Heating: A Brief Overview

In the last few years, the water heating industry has witnessed a significant evolution, marked by the rise of tankless water heaters. These modern systems have revolutionized the way we access hot water, offering unparalleled efficiency and convenience. Unlike traditional water heaters, which store and constantly heat water, tankless models heat water on demand, eliminating standby heat loss and conserving energy. This shift towards tankless technology represents a fundamental change in the approach to water heating, providing homeowners with a more sustainable and cost-effective solution.

The rise of tankless water heaters has not only transformed the residential water heating landscape but also revolutionized commercial and industrial applications. Businesses and institutions are increasingly turning to tankless systems to meet their hot water needs, benefiting from their compact design, energy efficiency, and scalability. As the demand for more sustainable and efficient water heating solutions continues to grow, tankless water heaters are poised to play a pivotal role in shaping the future of the industry, offering a glimpse into a more streamlined and environmentally conscious approach to hot water production.

Decoding Tankless Technology: How It Works

At the heart of every tankless water heater lies a sophisticated heating mechanism designed to deliver hot water on demand. Whether powered by gas or electricity, these water heaters share a common goal: to heat water quickly and efficiently. Let's unravel the mystery behind their operation.

  • Electric Tankless Water Heaters: Electrifying Efficiency
    While gas tankless water heaters reign supreme in many households, their electric counterparts offer their own set of advantages. Electric tankless water heaters utilize powerful heating elements to raise the water temperature as it passes through the hot water heater. While they may lack the instantaneous heating capability of gas models, electric tankless water heaters excel in reliability and simplicity, making them a popular choice for smaller homes and apartments.
  • Gas Tankless Water Heaters: Harnessing the Power of Natural Gas and Liquid Propane
    Gas Tankless Water Heaters stand at the forefront of innovation, leveraging the versatility and efficiency of natural gas and propane to deliver unparalleled performance. Upon activation, a gas-powered tankless water heater ignites a burner, heating a heat exchanger.

    Gas water heaters function by rapidly heating water as it crosses a heat exchanger upon the activation of a hot water tap. Unlike traditional storage tank heaters that continuously keep water heated, tankless variants only operate when hot water is demanded, thereby eliminating standby heat loss. This efficient design saves resources and guarantees instant availability of hot water whenever necessary, contributing to the growing preference for tankless water heaters in residential water heating solutions.

    The operation of gas tankless water heaters ensures optimal energy usage and minimizes waste. By heating water solely on demand, these water heaters avoid the energy losses associated with constantly maintaining a reservoir of heated water. Moreover, their compact size and on-demand heating capability make them ideal for homes where space is limited. As energy efficiency and convenience become increasingly prioritized in household appliances, tankless water heaters emerge as a popular and sustainable choice for meeting hot water needs.

Key Components of Tankless Water Heaters


  • Gas Burner: In gas tankless water heaters like Eccotemp, the gas burner plays a crucial role as the primary heat source. When the hot water tap is activated, the gas burner ignites, quickly heating the water as it passes through the water heater. This instantaneous heating system ensures that hot water is easily available whenever needed, without the delays associated with traditional hot water heaters. By leveraging the gas burner's efficiency, Eccotemp tankless water heaters deliver a seamless and uninterrupted supply of hot water, enhancing relief and convenience for users.
  • Heat Exchanger: In tankless water heaters, the heat exchanger serves as the central component responsible for transferring heat from the burner to the water. Positioned at the core of the system, the heat exchanger facilitates efficient heating by maximizing the transfer of thermal energy while minimizing energy loss. This crucial component ensures that water is rapidly heated to the desired temperature as it flows through the water heater.
  • Flow Sensor: Tankless water heaters come with flow sensors designed to detect the demand for hot water. These sensors play a decisive role in initiating the heating process when hot water is required. Upon sensing the water flow, the water heater responds promptly by activating and heating the water as it travels through the system. It ensures that hot water is delivered instantaneously, meeting the user's needs accurately and efficiently. The flow sensor's functionality enables the tankless water heater to operate on demand, providing a continuous and reliable supply of hot water whenever necessary.

Flexible Options

You have the flexibility to select the fuel option that aligns perfectly with your preferences and needs. The Eccotemp Gas Tankless Water Heaters offer flexible fuel options, so you can choose what best suits your needs. These water heaters are available in both liquid propane and natural gas configurations.

  • Natural Gas: It presents itself as a notably cost-effective choice for water heating, frequently boasting lower costs compared to electricity. Its ability to provide a steady and rapid hot water supply proves especially advantageous for larger households with higher demand. Nonetheless, accessibility to a natural gas supply line can vary, potentially resulting in elevated installation expenses, especially if an extension is required to reach the water heater's location.
  • Liquid Propane: It emerges as a versatile option, serving as a dependable energy source in areas without access to natural gas infrastructure. While efficient for water heating, liquid propane tanks necessitate regular refilling, leading to supplementary expenses. Nevertheless, homeowners value the independence offered by having their own fuel source, despite the associated costs of propane tank refills.

Eccotemp Gas Tankless Water Heaters

Eccotemp Gas Tankless Model: SH22-ING

Eccotemp Gas Tankless Water Heaters utilize advanced technology to provide efficient and dependable hot water solutions. These systems are equipped with a gas burner responsible for heating water as it passes through a heat exchanger. When activated, the burner ignites quickly, raising the water temperature to the desired level with precision. This seamless operation guarantees a steady flow of hot water, rendering Eccotemp gas tankless water heaters suitable for households of varying sizes.

The design of Eccotemp Tankless Water Heaters ensures optimal performance and energy efficiency. By heating water only when needed, these water heaters eliminate the energy waste associated with traditional water heaters. Additionally, the absence of a storage tank minimizes standby heat loss, further enhancing efficiency. With their innovative design and reliable performance, Eccotemp gas tankless water heaters offer a convenient and eco-friendly solution for meeting hot water demands in residential settings.

Benefits of Eccotemp Tankless Water Heaters

Eccotemp Tankless Water Heaters offer numerous benefits for residential water heating needs. These include efficient on-demand heating, a space-saving design, and reduced energy consumption compared to traditional water heaters.

  • Endless Hot Water Supply: Experience the luxury of an endless hot water supply with Eccotemp Tankless Water Heaters, ensuring you never have to worry about running out of hot water. Delight in an uninterrupted shower, laundry cycles, and dishwashing tasks, all without the hassle of waiting for water to heat up. With Eccotemp, convenience and relief are guaranteed, allowing you to enjoy everyday tasks without disruption or inconvenience.
  • Space-Saving Design: Say goodbye to bulky hot water tanks and reclaim valuable space in your home. Eccotemp Tankless Water Heaters feature a compact footprint, making them ideal for installations in tight spaces or small utility rooms.
  • Energy Efficiency: By heating water only when needed, Eccotemp Gas Tankless Water Heaters minimize energy waste and reduce utility bills. Experience significant cost savings over the long term while reducing your carbon footprint.
  • Longevity and Reliability: Designed for durability, Eccotemp Gas Tankless Water Heaters offer a lifespan of up to 20 years, outlasting conventional water heaters. With this longevity comes peace of mind, ensuring a reliable hot water supply for decades to come.
  • Customizable Settings and Controls: Take control of your hot water system with user-friendly controls and adjustable settings, allowing you to customize temperature preferences and optimize energy usage.
  • Advanced Technologies: Eccotemp integrates features like instant hot water and experiences effortless water heater management with the Eccotemp Smart App, providing convenience and control over your hot water system.
  • Reduced Risk of Water Damage: Bid farewell to the threat of tank failures and ruptures. Eccotemp Tankless Water Heaters, free of stored water, eliminate the risk of significant water damage, though vigilance regarding pipes and fixtures is still essential.
  • Safety: Experience precise temperature control, eradicating sudden hot water spikes. Eccotemp's commitment to safety ensures a reliable and comfortable hot water supply.

Factors to Consider When Choosing a Tankless Water Heater

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

  • Heating Capacity (BTUs): Assess the heating capacity of the gas tankless 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.
  • 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.
  • Energy Efficiency: Prioritize energy efficiency when selecting a gas tankless water heater, focusing on models with high efficiency ratings to assess their potential for long-term utility savings. Opting for a tankless 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.
  • Sizing: When selecting a tankless 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.
  • Installation Requirements: When contemplating a gas tankless 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 tankless water heater.
  • Maintenance: Regular maintenance is essential to keep your tankless water heater operating efficiently. This includes periodic descaling to prevent mineral buildup and ensure uninterrupted performance. Homeowners can optimize their tankless 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 a tankless water heater is a smart move to boost your home's comfort and energy efficiency. Tankless water heaters provide hot water on demand, eliminating the need for a storage tank and reducing energy waste. Discover key factors to consider when selecting the perfect tankless water heater for your home's needs with our 2024 Comprehensive Guide.

Addressing Potential Challenges

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

  • Flow Rate Management: Effective flow rate management is essential when selecting a gas tankless 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.
  • Performance Issues Due to Ventilation: Adequate ventilation is vital to ensuring the optimal performance of gas-powered tankless 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.
  • Mineral Buildup Prevention: Like all water heating systems, gas tankless 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.
  • Cost Considerations and Long-Term Savings: While the initial cost of a gas tankless 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 gas tankless 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


As a testament to innovation and reliability in the world of hot water solutions, Eccotemp is consistently reshaping the industry landscape with its array of gas tankless water heaters. By merging cutting-edge technology with unparalleled reliability, Eccotemp delivers homeowners an elevated hot water experience characterized by 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 Gas Tankless Water Heater 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 tankless water heaters provide hot water instantly?
Answer: Tankless 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 a tankless water heater?
Answer: For proper installation of a tankless 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 a tankless water heater look like?
Answer: A tankless 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.


Tankless Water Heaters provide a dependable, energy-efficient, and eco-friendly option for fulfilling your household's hot water demands. A thorough comprehension of their operational mechanisms and a careful assessment of their attributes empower homeowners to make informed decisions when it comes to enhancing their hot water systems.

Embark on a journey of convenience, efficiency, and uninterrupted hot water access with Eccotemp Gas Tankless Water Heaters. Revel in the amenities and long-term financial benefits they bring, ensuring years of satisfaction and savings.

Find The Right Water Heater

Our agents are here to help find the right water heater for your installation and needs. Tankless water heaters are not a one size fits all!

  • sh22 natural gas tankless water

    Smart Home 6.8 GPM Outdoor Tankless Water Heater, SH22 Series

    "Great value. If you compare the features with any other brands, you will not find another value. I’ve been extremely impressed with this unit."

    - Adam V.
  • 45hi natural gas tankless water

    6.8 GPM Indoor Tankless Water Heater, 45 Series

    "Saved The Day! We had a very old water heater that was notorious for taking 1 minute to get hot in the shower, the 45HI-NG has the shower hot in 10 seconds! Thank you Eccotemp!"

    - Tyler C.
  • esh-2-5 mini tank water heater

    Smart Home 2.5 Gallon Electric Mini Tank Water Heater

    "Great price, fast delivery. I installed the unit under the kitchen sink. From opening the box, plumbing and connecting via Wifi were no more than 60 mins. I'll monitor the daily KW usage. Strongly recommend trying this unit."

    - Wade T.
  • shlx tankless water heater

    L5 1.5 GPM Portable Outdoor Tankless Water Heater

    "We love ours. Imagine cool weather with muddy 4 wheelers, muddy dogs, muddy kids, & gear...well that would destroy a normal weekend but not ours. We love taking warm showers and cleaning up with ours! It truly has been a game changer."

    - Mark F.
  • 6gb natural gas tankless water

    Builder Series 6.0 GPM Indoor Tankless Water Heater

    "Cannot be happier with this water heater. My family came home from a long weekend and we all were in desperate need for showers. Family of five showered back to back with no issues. Thanks for making life that much easier!"

    - Ron S.
  • sh22 liquid propane tankless water

    Smart Home 6.8 GPM Outdoor Tankless Water Heater, SH22 Series

    "Works great. Love it, does great for a family of 4, love the app and how you can adjust temp from phone. Works great for younger kids."

    - Redd
  • em-7-0 mini tank water

    Under Sink EM-7.0 Gallon Electric Mini Tank Water Heater

    "This guy recuperates in 20 minutes or less... Easily installs and works on 120 volts with very low power consumption and you do not have to wire up for high amps or a 240 line. I highly recommend this unit."

    - Louis G.
  • el10 portable tankless water

    Luxé 3.0 GPM Portable Outdoor Tankless Water Heater

    "Quickly heats water. I like the thermostat with digital reading of water temperature. Has ample pressure and never ran out of warm water rinsing my horse whose reaction was that he liked the warm water."

    - Betty S.
  • el22i natural gas tankless water

    6.8 GPM Indoor Tankless Water Heater, EL22 Series

    "Great buy! Great purchase! Installation was quick and easy. Highly recommend!"

    - John C.
  • i12 liquid propane tankless water

    4.0 GPM Indoor Tankless Water Heater, i12 Series

    "I installed the unit a month ago with some fantastic tech support. Over all I am very happy with the performance of the heater and would recommend this unit to anyone."

    - Marc D.
  • esh 2 5 mini tank water

    Smart Home 2.5 Gallon Electric Mini Tank Water Heater

    "Look and size of the hot water heater is perfect if you are adding this to a work shop or bathroom. This water heater uses Wi-Fi so you can connect to Alexa and ok Google. Very nice packaging and very clear, easy to follow directions."

    - Matt
  • el7 portable tankless water

    Luxé 1.85 GPM Portable Outdoor Tankless Water Heater

    "Great Portable Water Heater. Delivers functionally and aesthetically. Very easy to set up and came with everything I needed. Well constructed and I like that I can easily see the water temp. Look forward to years of use."

    - ARS