Tankless Hot Water Heaters

A tankless hot water heater, also known as an on-demand or instantaneous water heater, is a highly efficient and space-saving alternative to traditional storage tank water heaters. Unlike storage tank water heaters, tankless water heaters do not store hot water in a tank, but rather heat water as it flows through the unit. This allows for a continuous supply of hot water, as well as significant energy savings.

The main components of a tankless hot water heater include the heat exchanger, the burner, and the control system. The heat exchanger is responsible for heating the water as it flows through the unit. The burner, typically fueled by natural gas or propane, provides the heat source for the heat exchanger. The control system regulates the flow of water and fuel to the burner, ensuring efficient and safe operation.

The heat exchanger in a tankless hot water heater is typically made of copper or stainless steel, and utilizes a high-efficiency condensing design. This allows for maximum heat transfer from the burner to the water, resulting in highly efficient operation. In addition, the heat exchanger is protected by a stainless steel casing, which increases its durability and longevity.

The burner in a tankless hot water heater is typically fueled by natural gas or propane, and uses a high-efficiency design to minimize fuel consumption. The control system regulates the flow of fuel to the burner, ensuring efficient and safe operation. The control system also includes safety features such as overheat and freeze protection, as well as a self-diagnostic system for easy maintenance.

One of the main advantages of a tankless hot water heater is its ability to provide a continuous supply of hot water. Since the unit heats water as it flows through the unit, there is no need to wait for a storage tank to refill before hot water is available. This eliminates the need for a large storage tank and associated standby losses.

Another advantage of a tankless hot water heater is its energy efficiency. Since the unit heats water as it is used, it does not need to maintain the temperature of a large storage tank. This results in significant energy savings, typically 20 to 30 percent compared to traditional storage tank water heaters.

In addition to energy savings, tankless hot water heaters also have a longer lifespan than traditional storage tank water heaters. This is due to the lack of a storage tank, which is subject to corrosion and leaks. Tankless hot water heaters also have fewer moving parts, which reduces the likelihood of mechanical failure.


There are some limitations to tankless hot water heaters. The most significant limitation is the flow rate, which is the amount of hot water the unit can produce at a given time. The flow rate of a tankless hot water heater is typically lower than that of a traditional storage tank water heater. This means that a tankless hot water heater may not be able to meet the hot water demands of a large household with multiple showers, bathtubs, and appliances running at the same time.

Another limitation is the upfront cost, as tankless hot water heaters tend to be more expensive than traditional storage tank water heaters. However, the energy savings and longer lifespan of a tankless hot water heater will offset the higher upfront cost over time.

In conclusion, tankless hot water heaters offer a highly efficient and space-saving alternative to traditional storage tank water heaters. With its ability to provide a continuous supply of hot water and significant energy savings, a tankless hot water heater is a wise investment for any homeowner. However, it's important to consider the flow rate and upfront cost before deciding to install a tankless hot water heater. As with any major appliance, consult with a professional plumber before you decide. The professional plumbers here at All Trades are standing by to answer your questions. Contact us today for a free consultation. We service Las Vegas, Henderson, Boulder City, and most parts of Clark County Nevada.