Are you considering upgrading your hot water system? Have you heard about tankless or demand-type water heaters and want to learn more? In this comprehensive guide, we’ll explore tankless water heaters, how they work, their benefits, and why they might be the perfect replacement for your current water heater.

how does a tankless water heater work


What is a Tankless Water Heater?

An instant water heater, sometimes called a tankless water heater, is an efficient and contemporary replacement for conventional water heaters with storage containers. Unlike traditional heaters, which store and continuously heat water, tankless heaters heat water only when needed, providing hot water on demand.


How Does a Tankless Water Heater Work?

Tankless water heaters operate using a straightforward yet innovative process. When you turn on a hot water tap or appliance, cold water enters the unit through the inlet pipe. The heater’s powerful electric heating elements or a gas burner rapidly heat the water as it passes through a heat exchanger.

The heat exchanger raises the water’s temperature to the appropriate level by exchanging heat from the burner or heating sources. Once the water reaches the set temperature, it exits the unit through the outlet pipe and flows to your taps, showers, or appliances.

The essential advantage of this design is that tankless heaters eliminate the need for storing and continuously heating a large volume of water, which can lead to energy wastage in traditional water heaters. 


Energy Efficiency and Cost Savings

Saving energy is among tankless water heaters’ most essential advantages. Because they only heat water as needed, they consume less energy than traditional heaters, which must constantly keep a tank of water hot.

When properly maintained, tankless heaters can last up to 20 years, longer than regular heaters. This extended lifespan contributes to further energy efficiency cost savings over time, as you won’t need to replace your water heater as frequently. 


Endless Hot Water Supply

Another significant benefit is the capacity of tankless water heaters to produce an infinite hot water supply. Traditional water heaters with storage tanks can run out of hot water, especially during periods of high demand, leading to cold showers or waiting times for the tank to reheat.

With a tankless heater, since water is heated on demand, there’s no risk of running out of hot water. Whether you need to take multiple showers in a row or run several hot water appliances simultaneously, a tankless heater can keep up with your household’s demands.


Space-Saving Design

Tankless water heaters are also favoured for their compact and space-saving design. Unlike bulky traditional heaters that require a dedicated storage tank, tankless units are typically wall-mounted and take up significantly less space.

This space efficiency benefits homes with limited storage or utility space. Tankless heaters can be installed in closets, utility rooms, or outside the house, freeing up valuable indoor space for other purposes.


Environmental Benefits

Tankless water heaters also offer environmental benefits due to their reduced energy consumption. Using less energy to heat water helps lower greenhouse gas emissions associated with energy production.

Furthermore, tankless heaters have a smaller carbon footprint than traditional heaters because they require fewer materials to manufacture and dispose of. Reach out to a plumber or water heater specialist to discover how tankless water heaters can enhance your home’s efficiency and provide continuous hot water.


Difference Between Tankless On Demand vs Regular Water Heaters


Tankless Water Heaters or On-Demand Heaters

An on-demand water heater, or tankless water heater, heats water directly without a storage tank; when hot water is required, cold water flows through a heat exchanger, heated by a gas burner or electric element, ensuring a continuous supply of hot water without reliance on a finite tank; this system is typically more energy-efficient than traditional tank water heaters as it avoids continuously heating water in storage.


Demand-Type or Regular Water Heaters 

Demand-type water heaters encompass a broader category, including both tankless/on-demand systems and traditional tank-style heaters. A demand-type water heater, unlike its traditional counterpart, is a tank water heater fitted with a demand activation feature, storing hot water but heating it solely upon demand; these heaters use a thermostat or flow sensor to detect hot water needs and activate heating elements or burners accordingly; though more efficient than conventional tank water heaters due to heating only when necessary, they typically fall short of the efficiency of tankless water heaters.


Key Differences

Storage: Tankless water heaters operate without the need to store hot water, heating it only when necessary, while demand-type tank-style water heaters store hot water in a tank and maintain its temperature continuously.

Energy Efficiency: Tankless water heaters are typically more energy-efficient compared to demand-type tank-style heaters, as they eliminate standby heat loss associated with storing hot water.

Space Requirement: Tankless water heaters are usually more compact and require less space than tank-style demand-type water heaters, which need room for the storage tank.


Choosing the Right Tankless Water Heater

When considering a tankless water heater as a replacement for your current system, several factors should be taken into account:


Fuel Type

Electric and gas (propane or natural gas) variants of tankless water heaters exist. Choose a fuel type based on your home’s infrastructure and energy source preferences.


Flow Rate

Consider the maximum hot water flow rate required for your household. Different models offer varying flow rates, so ensure your chosen unit can meet your simultaneous hot water needs.


Size and Installation

Based on the available area and your plumbing configuration, decide on the proper installation size and position.


Energy Efficiency Rating

Seek out water heaters without tanks that have good energy efficiency ratings. These units can provide more significant energy savings over time.


Warranty and Maintenance

Check the manufacturer’s warranty and recommended maintenance procedures. Regular maintenance can prolong the heater’s lifespan and efficiency.


Professional Tankless Water Heater Installation and Maintenance


Tankless water heaters offer numerous benefits, including energy efficiency, cost savings, endless hot water supply, space-saving design, and environmental advantages. As a replacement for traditional water heaters, they provide a modern and efficient hot water solution for homes of all sizes.

When considering a tankless water heater, assess your household’s hot water needs, choose the appropriate size and fuel type, and prioritize energy efficiency and professional installation.

Kooline Plumbing Heating & Cooling


Kooline Plumbing provides expert installation and maintenance services for tankless water heaters. Our professional team ensures efficient and accurate installation based on your home’s needs. To extend the lifespan and improve the energy efficiency of your tankless water heater, we also provide regular repair and replacement services. Trust Kooline Plumbing for reliable tankless water heater services.

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