Which heat exchanger for a fireplace with a water jacket?

If you want to know which heat exchangers are best for a water jacket fireplace, read the article below. Learn how a water jacket fireplace works and why a heat exchanger is a crucial device ensuring the safe use of the fireplace. Also, find out how such a heat exchanger works and which devices are best suited for this role. Enjoy your reading.

What Is a Water Jacket Fireplace and How Does It Work?

A water jacket fireplace is a traditional yet quite innovative device that allows for efficient utilization of thermal energy in the heating process. It has a different structure from a traditional fireplace because it has double walls through which water flows. Burning wood or coal in the firebox generates heat, which is absorbed by the water in the jacket. The water in the jacket starts to heat up and transfers heat to the heating system. This way of operation allows a water jacket fireplace to serve not only as an interior decoration but also as an effective and relatively inexpensive heating solution for rooms.

✅ In addition, a water jacket fireplace also allows for the recovery of heat from flue gases - as the water jacket also consists of tubes with heated water placed above the firebox, which further increases its efficiency. This means that the fireplace not only utilizes the heat generated during the burning of wood but also recovers energy from the waste flue gases, which would be useless in a traditional fireplace. Thus, a water jacket fireplace is an ecological and economical solution that minimizes heat loss and reduces heating costs.

Why Is a Heat Exchanger Needed for a Water Jacket Fireplace?

In many heating configurations for a water jacket fireplace, it is necessary to connect a heat exchanger to ensure the optimal functioning of the entire heating system. The heat exchanger plays a crucial role in the heating process of the building using a water jacket fireplace. One of the main reasons why a heat exchanger is necessary is to protect the entire heating system from overheating. Fireplaces, due to their properties (inertia of heating), operate in an open system, which protects them from overheating the installation. The central heating system, on the other hand, operates in a closed system in modern construction - so it must be separated from the open system of the fireplace.

✅ The connection of the fireplace with radiators or UFH using a heat exchanger ensures that the water in the open circuit (from the fireplace) does not mix with the water in the closed circuit (from the radiators). This prevents overheating and damage to the heating system.

Plate Heat Exchanger for a Fireplace gives the safety

Another reason to use a heat exchanger is to prevent excessive pressure build-up in the water jacket of the fireplace. During the wood burning process, the water in the jacket heats up, leading to an increase in pressure. The heat exchanger allows for controlling and dissipating excess heat, thus preventing excessive pressure buildup in the jacket.

Connecting a water jacket fireplace with radiators using a heat exchanger enables effective and uniform distribution of heat throughout the rooms in the entire building. This ensures that the room temperature is adequate, providing comfortable living conditions.

On stock

Plate Heat Exchanger NORDIC Ba-23-50 3/4" 210kW

NT Ba-23-50

€154.99

Add to basket

On stock

Plate Heat Exchanger NORDIC Ba-16-22 1" 100kW

NT Ba-16-22

€109.99

Add to basket

On stock

Plate Heat Exchanger NORDIC Ba-16-26 1" 105kW

NT Ba-16-26

€119.99

Add to basket

What Is a Heat Exchanger for a Water Jacket Fireplace?

Heat exchangers for water jacket fireplaces are devices that enable the transfer of heat from the fireplace to the central heating system. The exchanger is installed between a special water jacket surrounding the fireplace and the central heating system. It allows for the separation of the open fireplace circuit from the closed central heating system.

✅ This solution allows the fireplace to operate in an open vented system, where the air necessary for combustion is drawn from the room, and the combustion products are vented outside through the chimney. Meanwhile, the water circulating through the heat exchanger is contained within the central heating system. This means that the flames of the fireplace do not have direct contact with the water circulating in the closed heating system. Thanks to this solution, a water jacket fireplace is safe to use.

Furthermore, the heat generated by the fireplace is effectively utilized for heating water, heating the room, or operating the entire heating system. A heat exchanger for a water jacket fireplace is an excellent solution for those who want to enjoy the ambiance of a fireplace while also using it as a source of heat for their home.

How Does a Heat Exchanger for a Water Jacket Fireplace Work?

A heat exchanger for a water jacket fireplace is a device that allows the heat generated during wood burning to be used as a source of hot domestic water. The exchanger operates based on the principle of heat transfer between two fluids. In this case, they are:

• the water inside the fireplace
• and the water in the central heating system.

The process begins with the absorption of heat generated during combustion, which is transferred to the fluid in the fireplace's water jacket.

Next, with the help of a pump, the heated water from the jacket is pumped to a valve that determines the flow to the central heating system. At this point, the heated water from the fireplace can transfer its heat to the water in the system, thereby heating the home's central heating installation. It's important to note that the heat exchanger operates in a closed loop, meaning that the water inside the fireplace does not directly mix with the domestic water.

This ensures safe and hygienic operation of the device. It also allows for the effective utilization of heat that would otherwise be expelled from the fireplace unnecessarily (heat loss through the chimney). Thanks to a heat exchanger for a water jacket fireplace, energy can be saved and natural heat sources can be utilized effectively.

Examples of Heat Exchangers for Water Jacket Fireplaces

The main advantage of these types of exchangers is the ability to utilize an existing fireplace to provide an additional heat source for the home. Additionally, plate heat exchangers are easy to install and do not require major changes to the fireplace's structure. They are also relatively inexpensive compared to other heating systems. The high heat transfer efficiency makes a water jacket fireplace an increasingly popular solution among those seeking economical and ecological ways to heat their homes.

When Does a Heat Exchanger Work Properly in Conjunction with a Water Jacket Fireplace?

To ensure that a heat exchanger works properly in conjunction with a water jacket fireplace, it's necessary to select the exchanger correctly for the fireplace's power and the appropriate heat exchange surface area. When selecting the exchanger, the fireplace's power should be taken into account because the higher the power, the greater the heat transfer requirement. The exchanger should also have a sufficiently large heat exchange surface area (number of plates) to effectively transfer heat from the fireplace to the central heating system.

✅ A plate heat exchanger for a water jacket fireplace should be tailored to both the size of the fireplace and the needs of the rooms in the building to be heated. Incorrectly sizing the exchanger can lead to inefficient heat transfer, resulting in inadequate room heating. Therefore, it's important to carefully select the exchanger for the fireplace to ensure efficient and economical heat exchange.

On stock

Plate Heat Exchanger NORDIC Ba-16-32 1" 130kW

NT Ba-16-32

€129.99

Add to basket

On stock

Plate Heat Exchanger NORDIC Ba-27-20 1 1/4" 125kW

NT Ba-27-20

€139.99

Add to basket

On stock

Plate Heat Exchanger NORDIC Ba-16-40 1" 150kW

NT Ba-16-40

€149.99

Add to basket