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These G4 filter grilles are a solid choice if you're maintaining exhaust valves or plate valves in HVAC systems.
Each filter measures about 180mm in length and is designed to fit DN125 round exhaust valves – compatible with brands like Zehnder, Helios, Maico, and Pluggit, plus many others with similar specs.
The G4 class meets DIN EN 779 standards, meaning they do a solid job of trapping dust and particulates to keep airflow clean and efficient.

What's neat is the progressive depth structure – it gradually traps particles at different layers, which extends the life of the filter and improves overall performance.






5 out of 5