The dust bag is a collection system
A disposable bag collects debris inside a machine designed for that bag system. Its mounting plate and family code matter. A pack may contain small filter pieces as extras, but that does not make bag and filter interchangeable words. Bagless machines still use filters even though they do not accept a dust bag.
Filters occupy different positions
A pre-motor filter sits earlier in the air path than an exhaust filter. A machine may need more than one, and a kit may not include them all. Use the manufacturer’s component names and diagrams to identify which one you need. Do not assume a filter is washable because another filter in the same machine is.
Brush rolls belong to a head system
The roller is the rotating component that works at the floor or inside a small powered tool. A full cleaner head and a replacement roller are not the same product. The same vacuum can be supplied with different heads, so roller compatibility may require both the machine and head reference.
Describe the job before searching
A good replacement query combines an exact machine with a component and a reference, for example NV360 XFF350 rather than Shark accessory. If you are trying to solve a symptom, use the official troubleshooting guide first: poor pickup can have more than one cause. Do not treat a part purchase as a diagnosis. Stop using a machine with smoke, burning smell, damaged wiring or abnormal heat and contact an appropriate service provider.
- Bag: debris collection and a model-specific mounting system.
- Pre-motor filter: one stage of the airflow path.
- Exhaust filter: a separate downstream component.
- Brush roll: a moving part of a specific cleaner head.
Sources & scope
- Miele USA: bag and filter systems ↗
- Shark: XFF350 official model list ↗
- Shark: XHF350 official model list ↗
- iRobot: main brush care ↗
This is an editorial explanation of the cited material. We do not claim hands-on product testing. Manufacturer instructions for the exact machine take precedence.
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