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Recirculating range hood: when to replace charcoal filters

Recirculating hoods may have charcoal odor filters that need replacement rather than washing. Identify your model and filter type first.

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Wikimedia Commons · Steven Pavlov / Wikimedia Commons, CC BY-SA 4.0; unmodified original photo. · CC BY-SA 4.0 ↗

A range hood may contain a washable metal grease filter and a separate charcoal odor filter. Bosch specifies replacement charcoal filters for certain recirculating models and asks users to verify compatibility. Vented hoods may have no charcoal element; some specialty filters regenerate differently. Never wash or heat a filter without explicit maker approval.

Your try-it-at-home checklist

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Determine whether your hood ducts air outdoors or recirculates it indoors, and locate the exact model instructions.
Check for a separate metal grease filter and an activated-carbon odor filter; externally vented models may have no charcoal filter.
Turn off the hood, let it cool and access the filter only as described by the maker. Avoid unsafe reaching or working at height.
Check whether the charcoal element is disposable or expressly washable/regenerable; never wash, bake or reuse a disposable filter.
Verify part compatibility and inspect discoloration or soiling. Bosch notes roughly 4–6 months for certain replacement filters depending on use; do not generalize this to every hood.
Fit the manufacturer-approved filter securely and reset any indicator according to the manual. Stop use if the unit vibrates or the filter does not fit correctly.

Your try-it-at-home checklist

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