Combined air and dirt separation: the key to an optimal system
Modern energy-efficient heating and cooling systems perform best when the system water is completely free of air and dirt. Air and dirt in the water reduce efficiency, increase the risk of failure, and lead to unnecessary wear and tear on key components. It is therefore essential to remove both air and dirt continuously and effectively.
SpiroCombi: two functions in one solution
The SpiroCombi from Spirotech has been specially developed to remove air and dirt from your system water at the same time. This innovative solution ensures that your installation continues to perform optimally, without the need for maintenance or replacement of filters.
What does the SpiroCombi remove?
- Circulating air: Prevents air pockets and disturbing noises.
- Microbubbles: Invisible air bubbles that can otherwise cause problems.
- Dirt particles larger than 5 μm: Protects sensitive parts from clogging and wear.
With a SpiroCombi, your system water stays clean, clear and efficient, which ensures a longer lifespan of your installation and lower maintenance costs.

How do you recognize air and dirt in your installation?
Air and dirt in your heating system cause all kinds of inconveniences and problems. Think of bubbling pipes, cold spots in your radiators or a boiler that starts up unnecessarily often. These are clear signals that there is air in the system. For example, you notice it when radiators at the top stay cold or when you have to bleed regularly.
Dirt, such as magnetite, can be recognized by other symptoms. Radiators then stay cold at the bottom, the circulation pump makes noise or even fails, and when you drain water, it is black in color.
Both air and dirt cause loss of efficiency, wear and tear and ultimately malfunctions. An automatic air vent and a good dirt separator keep your installation healthy and efficient.
The best place for a SpiroCombi in your system
The position of the SpiroCombi is important for optimal operation:
- In heating systems: Placement in the supply line is preferred, as the water is warmest here, which allows air bubbles to escape more easily.
- Alternative in case of lack of space: If placement in the supply line is not possible, the SpiroCombi also works effectively in the return line.
- In cooling systems: Here, placement in the return line, just before the water enters the cooling unit, is preferred to efficiently capture dirt.
Why choose the SpiroCombi?
- Continuous air and dirt removal even during normal system operation.
- No bypass or valves required, which makes installation easy.
- Lower maintenance costs thanks to low-maintenance operation.
- Better protection of sensitive system components against damage and wear.
Want to know more about how the SpiroCombi makes your system more efficient and sustainable and how it takes your installation to the next level?
Clean installations perform better: our air and dirt separators ensure a more efficient, trouble-free and sustainable system
Our solutions for combined Deaeration & Dirt separation

