Many homeowners, especially those living in older buildings, still use gravity ventilation systems. Although these systems are simple and inexpensive to install, their effectiveness depends heavily on weather conditions and may be insufficient in modern, airtight buildings. Replacing gravity ventilation with mechanical ventilation is an investment that improves living comfort, air quality and the energy efficiency of your home.
Gravity ventilation vs. mechanical ventilation – basic differences
Gravity ventilation works on the principle of natural air movement resulting from temperature and pressure differences between the interior and the environment. In practice, this means that its efficiency can be highly variable – in winter it can cause excessive cooling, and in summer it may be virtually ineffective.
Mechanical ventilation, on the other hand, is a controlled supply and exhaust system, often equipped with a recuperator, which allows for constant air exchange regardless of external conditions and additionally recovers heat from the removed air.
Why is it worth converting gravity ventilation to mechanical ventilation?
Converting gravity ventilation to mechanical ventilation brings a number of benefits:
- Better air quality – filtration of pollutants, allergens and smog.
- Constant air exchange – regardless of the weather.
- Heat recovery – lower heating bills.
- Thermal comfort – no draughts and no need to open windows.
- Building protection – reduction of moisture and prevention of mould growth.
As a result, investing in a modern ventilation system quickly pays for itself – both in terms of savings and improved health for residents.
Changing from gravity ventilation to mechanical ventilation and regulations
The question arises whether changing from gravity ventilation to mechanical ventilation is a significant change and whether it requires additional permits. In most cases, the installation of a mechanical system in an existing building is treated as a modernisation that does not require a building permit, as long as it does not interfere with the structure of the building. However, it is always worth consulting the installation designer.
Which solution should you choose?
When modernising older buildings, it is important to choose the right type of system. We offer a choice of:
- Central units - serve the entire building via a network of ventilation ducts. Ideal for those planning a comprehensive renovation or construction from scratch.
- Decentralised units – installed in specific rooms, without the need for ducts. Perfect for modernising individual zones or flats.
The choice depends on your budget, technical capabilities and expectations regarding the results. It is also worth learning about the different types of ventilation in order to better tailor the system to your needs.
Installation and operation
Changing the system requires planning the installation process, selecting a device with the appropriate capacity, and determining the air supply and exhaust locations. Professional installation guarantees quiet and trouble-free operation of the system and its longevity. After installation, periodic filter replacement and technical service are necessary.
Switching from gravity ventilation to mechanical ventilation is a step towards a modern, energy-efficient and healthy home. Regardless of whether you choose a centralised or decentralised system, you will gain a constant supply of fresh air, lower heating costs and a better indoor microclimate. It is an investment that improves your quality of life and increases the value of your property.
