An automatic air vent can significantly increase the efficiency and safety of a heating system. In this new post, we explain how this element works and what function it performs in the entire system.
Air in the central heating system is a common but very annoying problem. Air can get into these systems in various ways - for example, through leaks, plastic pipes or through the medium during filling. Sometimes, air is also caused by errors such as filling the system too quickly.
An air-filled system does not function properly, and its users may notice many disturbing symptoms. In the case of a central heating system, these are usually strange sounds coming from pipes or radiators - e.g. knocking, humming or gurgling. Air from the radiator may also lead to its uneven heating. If it gets into the pump, it may even lead to so-called dry running, which is already a direct threat to the technical condition of the system and the safety of its users.
Fortunately, air in the system can be effectively prevented. The most effective and safest method is to install an automatic air vent . But how does it work? How to use it effectively?
Check out the automatic air vents at the Onninen wholesaler
Automatic air vent in the heating system
Automatic air vents can be mounted in various locations in the installation. Example locations of this element are:
bathroom radiators;
other wall radiators;
tops of installation risers;
air heaters;
expansion tanks;
heating boilers.
An automatic air vent may be part of a central heating installation, but it can also be found in installations with a solar collector (models such as FLEXVENT Top Solar ) and in underfloor heating. It is important that it is adapted to the specifics of the installation. This refers to operating parameters such as maximum temperature and operating pressure. In case of problems with selecting the right product, you can use the help of our advisors.
Buying a breather costs a few dozen zlotys. The best models, such as FLEXVENT automatic air vent by FLAMCO MEIBES cost about 70 PLN. Its installation in the heating system is recommended 
many arguments. The most important are:
convenience – these types of vents are virtually maintenance-free;
versatility – it can vent both individual radiators and large sections of the installation;
efficiency – works twice as efficiently as other solutions available on the market;
possibility of replacing the air vent without having to remove water from the installation;
correct operation even despite contamination – the opening of the hole is operated by a lever activated by a falling float;
durability and reliability.
How does an automatic air vent work?
The most important element of an automatic air vent is a float immersed in water in a cylindrical body. If there is air in the system, it also enters the air vent, causing the water level to drop. This in turn causes the float to drop and a small hole to open through which the air can be released. After this operation, the water level and the float rise again, and as a result, the hole closes.
How to bleed an automatic air vent?
Venting of the system equipped with an automatic vent is automatic – so user intervention is not necessary. Any problems with the operation of this element are the result of damage or incorrect installation. Therefore, if we do not have the appropriate knowledge and tools, this task should be entrusted to a proven specialist.
A properly selected and correctly installed automatic air vent will reward you with many years of trouble-free operation. It will also significantly increase the comfort and safety of using the heating system. Our store offers a wide selection of these elements, among which you will certainly find a solution tailored to your needs. Thanks to cooperation with renowned manufacturers, we ensure the highest quality of products. We also offer other devices necessary to build an efficient heating system.