A Dyson DC24 that has lost its edge on fine dust, or that pushes a stale smell into the room while it runs, is usually telling you the post-motor filter is loaded. This is the replacement washable post-motor HEPA filter for that job. It sits after the motor, so it is the last thing the air passes through before it goes back into your living space, and it is the filter that matters most in a house with allergies or shedding pets.
Built for
- Allergy and asthma households that want the exhaust air filtered, not just the dirt collected
- Homes with cats or dogs, where dander loads the post-motor stage faster than the pre-motor one
- Anyone bringing a used or hand-me-down DC24 back into service, where filter history is unknown
- Small offices and rentals running a DC24 daily rather than weekly
Use cases
Two situations bring most people to this part. The first is gradual: the DC24 still spins its brush bar and still picks up visible debris, but the machine feels tired and the room smells faintly of dust afterward. That is a restriction in the exhaust path, and a fresh or freshly washed post-motor filter usually fixes it in minutes. The second is scheduled maintenance - the filter has been rinsed a dozen times, the media has gone gray and stiff, and it is simply due for replacement rather than another wash.
Specifications
- Type: post-motor (exhaust) HEPA filter, washable and reusable
- Outside diameter: 4.75 inches
- Position: after the motor, in the DC24 exhaust housing
- Application: Dyson DC24 upright vacuums, including DC24 Animal and DC24 Multi Floor
- Cross-reference seen at distributors: Dyson DC24 post-motor filter 915928-12
Note that most Dyson uprights carry two filters, a pre-motor filter and this post-motor filter, and they are different parts. If you are chasing lost suction, check and service both. Confirm the model number on your machine's label before ordering.
Frequently asked questions
How often should I wash this filter?
Manufacturer guidance for the DC24 post-motor filter is a cold-water rinse about every six months under normal household use. Run it under cold water only, with no detergent, until the water runs clear.
Does it really have to be completely dry before it goes back in?
Yes. Allow at least 24 hours of air drying at room temperature. Fitting a damp filter pushes moisture into the motor path and is one of the most common ways a Dyson upright gets damaged during routine maintenance.
Can I put it in the dishwasher or a dryer to speed that up?
No. Heat distorts the pleated media and the plastic frame, which breaks the seal in the housing. Cold water and air drying only.
Is this the only filter on a DC24?
No. The DC24 also uses a washable pre-motor filter, which is a separate part. If suction has dropped off, service both filters and clear the cleaner head before assuming a mechanical fault.
When should I stop washing and just replace it?
About once a year under normal use, or sooner if the media stays gray after rinsing, feels stiff, or the frame or seal is cracked or torn. At that point washing no longer restores airflow.
Discount Cleaning Products supplies replacement parts for household and commercial vacuum cleaners, backed by US-based order support. If you are unsure which part your machine takes, send us the model number from the label and we will confirm it before you order.
