The Dyson DC39 Allergy was Dyson’s answer to a specific demand in the cylinder market: a vacuum that captures fine allergen particles, not just the visible debris. The DC39 introduced the Ball steering mechanism to Dyson’s cylinder range, allowing the machine to corner and manoeuvre without lifting; the Allergy specification then adds a HEPA exhaust filter that traps pollen, dust mite particles, and pet dander at the output stage, preventing them from recirculating into the room. The twelve-cyclone separation system maintains suction as the collection bin fills, which keeps the filter from having to compensate for a weakened airstream. Over time, fine particle loading in the filter medium itself reduces airflow efficiency, and washing is what resets it.
Three Plus.Parts® washable HEPA filters in this set cover the DC39 Allergy’s full annual maintenance cycle. Each unit is a direct-fit match to the housing: no cutting, no adapters, no modifications to the machine. Rotate through them on a schedule and the DC39 Allergy runs at its designed filtration level throughout the year. Rinse under cold water and allow a minimum of 24 hours drying time before reinstalling.
Any question about which variant of the HEPA filter fits your specific DC39 Allergy can be confirmed by our team. We answer personally.
In Summary
- Direct-Fit Compatibility – Sized to match the DC39 Allergy exhaust filter housing for straightforward installation with no tools required.
- Washable Filter Design – Reusable filter medium that restores suction and allergen-capture performance after each rinse cycle.
- Recommended by Our Team – Confirmed by VacuumReviews.eu as the correct washable HEPA replacement for the Dyson DC39 Allergy.
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