The Festool 496170 Main Filter Element for CT 26/36/48 is a replacement main filter for select Festool dust extractors. This is a dust extractor filter designed for standard fine dust filtration in applications that do not require HEPA performance. Model Number 496170. If you run a Festool CT 26, CT 36, or CT 48 and need to restore normal filtration performance with the correct replacement part, this is the filter you are looking for.

In practical terms, this filter captures particles down to 1 micron. That matters because the main filter catches residual dust that is not retained by the filter bag, helping direct cleaner air back into the workspace. For everyday shop and jobsite dust extraction where HEPA is not required, that gives you a straightforward replacement option without stepping into the wrong filter category.

This Festool main filter element is intended for dust classes L and M and is built as a standard paper filter element. The paper media and pleated design give it a lot of filtering surface area in a compact footprint, which helps maintain airflow while collecting fine dust. That is important on a dust extractor because poor airflow hurts pickup performance at the hose and makes the whole system feel weak long before the container is actually full.

Compatibility is the big buying decision here. Festool lists this filter for CT 26, CT 36, and CT 48 dust extractor models. Festool also notes that it is not suitable for mobile dust extractors with AUTOCLEAN function, so this is not a universal Festool vacuum filter. If you are replacing a worn standard filter in one of the listed CT extractors, it is a direct, model-specific maintenance part rather than a general-purpose substitute.

Just as important, this is not a HEPA filter. Festool is clear that it should not be used for applications requiring HEPA filtration, and it should not be used for EPA RRP work. That makes the use case pretty simple: it is for users who know their work does not require HEPA compliance and want the correct standard filter element for their compatible extractor.

Who should buy it? Owners of Festool CT 26, CT 36, or CT 48 dust extractors who need a replacement main filter for routine dust extraction work. It makes sense for woodworking shops, remodelers, installers, and serious DIY users already running a Festool dust collection setup, as long as the job does not call for HEPA filtration and the extractor is not an AUTOCLEAN model.

Festool 496170 Main Filter Element for CT 26/36/48 Keeps It Simple

This is the straightforward replacement filter for guys already running a compatible Festool extractor and not needing HEPA compliance.

• Who it's for: Festool CT 26, CT 36, and CT 48 owners replacing a worn standard main filter for regular dust collection work.
• Why it stands out: Proper fit, 1 micron filtration, and clear application limits so you know exactly where it belongs.
• Worth knowing: It is not a HEPA filter, and that is the whole story here. If your job requires HEPA or you have an AUTOCLEAN machine, move on and get the correct filter instead.

• Does this filter fit the Festool CT 48? Yes. Festool lists this main filter as suitable for CT 26, CT 36, and CT 48 dust extractor models.
• Is this a HEPA filter? No. This is a standard main filter for applications not requiring HEPA filtration.
• Can this be used for EPA RRP tasks? No. Festool states that this filter should not be used for EPA RRP work.
• Will this work with Festool AUTOCLEAN extractors? No. Festool states that it is not suitable for mobile dust extractors with AUTOCLEAN function.