The Festool 456790 Main Filter Element for CT MINI and CT MIDI is a replacement main filter for select Festool dust extractors. This is a main filter designed for dust extraction and fine particle filtration in Festool CT MINI and CT MIDI units manufactured until 2018. Model number 456790, it is built for woodworkers, remodelers, installers, and anyone relying on clean, consistent dust collection from an older Festool extractor.

The big reason this filter matters is simple: fine dust is what lingers in the air, settles everywhere, and ends up back in your workspace if the extractor cannot hold onto it. Festool rates this filter to trap particles down to 1 micron while maintaining airflow. In real use, that means better dust control at the source and less drop-off in suction as the job goes on.

This is a standard paper replacement filter element and a HEPA filter option for the supported machines. It filters residual dust that is not retained by the filter bag so cleaner air is directed back into the room. That is especially important when you are sanding, trimming, or cutting indoors where airborne wood dust becomes a cleanup problem fast.

Festool also designed this filter to resist clogging and caking so the extractor can reach full capacity more effectively. That matters on the job because a filter that loads up too quickly costs you suction, shortens bag life, and turns a good extractor into a weak one. If your older CT MINI or CT MIDI is not pulling like it should, the filter is one of the first wear items worth replacing.

Compatibility is the key detail here. This filter is suitable for Festool CT MINI and CT MIDI dust extractors manufactured until 2018, and it is not suitable for mobile dust extractors with AUTOCLEAN function. If you are matching replacement parts for one of those earlier units, this is the fitment detail you need to pay attention to before ordering.

Who should buy it? Anyone maintaining an older Festool compact dust extractor and wanting to keep filtration performance where it belongs. If you already own a pre-2018 CT MINI or CT MIDI, this is the kind of maintenance part that keeps the system working the way it was meant to instead of slowly getting worse job after job.

Small Part, Big Difference in Dust Collection

The Festool 456790 Main Filter Element is the kind of replacement part that makes an older extractor feel right again without overthinking it.

• Who it's for: Owners of pre-2018 Festool CT MINI and CT MIDI dust extractors who want to keep filtration and airflow where they should be.
• Why it stands out: It is a proper 1 micron replacement filter designed to trap fine dust without loading up too fast.
• Worth knowing: Fitment is specific. It is for CT MINI and CT MIDI units made until 2018, and it is not for AUTOCLEAN models.

• What machines does this filter fit? It fits Festool CT MINI and CT MIDI dust extractors manufactured until 2018.
• What is the filtration rating? This filter is designed to trap particles down to 1 micron.
• Can this be used with AUTOCLEAN extractors? No. Festool states it is not suitable for mobile dust extractors with AUTOCLEAN function.
• What is the filter made from? The filter element material is paper.