All About Boiler Components With Benefits

A gas, oil, or wood-fired boiler consists of a fairly complex machine with many components. It is important to know what these main elements consist of, to understand their maintenance. Thus, if your boiler breaks down, you will have the necessary vocabulary to discuss with a professional heating engineer before replacing certain spare parts. Here is an overview of the different boiler elements and their usefulness. These boiler parts are necessary for any boiler makeup and all these are easily available in online boilers-heating-supplies stores. Let’s discuss some of them.


The heating component ensures proper transmission of heat to the water which is an integral part of the heating circuit.

Did you know that depending on the spare parts and brands, we can sometimes get longer warranties? For example, the heating body is often guaranteed for three years.


The burner is the most important mechanical element of a gas boiler, condensing boiler, wood/pellet boiler, or oil boiler. It is made up of several parts that mix fuel and air to produce heat. It heats the water before distributing it through the radiators.

This component is notably equipped with a gas injector able to withstand high temperatures. The injector is used to regulate the flow of fuel.

The majority of burners available on the market consist of pulsed burners. They include a fan ensuring both the air supply supplying the combustion as well as the evacuation of the fumes.

Consult the datasheet of a burner to understand how it works.


In some boilers, such as mixed boilers, in particular, there is a hot water tank. It allows you to store heated water for your daily use (shower, washing up, etc.). The calorific energy generated by your boiler will therefore be used twice, both to heat your home, but also your domestic water. The tank can be either connected to your entire heating system or installed independently. Variable in size depending on the capacities of your boiler, it will allow you to save energy.


This is the real nerve center of your boiler. The electronic card, sometimes called the printed circuit, is made up of fuses, resistors, and transformers which will ensure the transmission of data to all parts

of the boiler. The electronic card connects all the elements and connects them through a current transmission system, a bit like a computer. The more recent your condensing boiler, the more the electronic card plays an important role in it. Thanks to it, the most advanced models allow the user to control the heating parameters with greater precision. In return, it can be programmed to shut down boiler operation if an anomaly is detected.


The gas block works in your boiler like a valve that authorizes or prevents the flow of gas. In other models of boilers, it can be replaced by a solenoid valve, which is becoming more and more widespread in new models. It is imperative to properly identify this central and very complex part in case you have to change it. There are a wide variety of models that can begin to seriously malfunction after several years of use.


The wood/pellet or condensing boiler always includes a circulator. It is a sphere-shaped part that, as its name suggests, promotes the circulation of water or any other heat-transfer liquid that operates in your device. The circulator also has a decisive role in the rise in pressure of the piping, which makes it possible to recover the liquid previously diffused. Among all the spare parts that make up your boiler, the circulator is one of those that break down most frequently. Fortunately, it is also one of the easiest to identify and, therefore, to replace. You will find it at all the suppliers of spare parts for the audience.

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