The filter keeps coming off whenever I run the vent due to the vibration, does any one have a solution to keep the filter in place?

I found it very difficult to snap the filter in place in the first place. Once you do though it seems quite secure. If it's fully seated and snapped in.

Do i need these filters if i am installing the hood with duct work?

No, the filters are only used if unit is used as a recirculating fan. If you duct an exhaust vent you do not need the filters.

Will this filter work for cosmo qs75 30-in under-cabinet range hood 900-cfm?? the cfk5 (they suggest) is out of stock.

CALL COSMO CUSTOMER SERVICE - THEY ARE TERRIFIC.

Which side should the filter be facing downwards?

Thank you for your question. In the middle of the filter on one side, you will see three slots where the notches on the range hood will slide and lock into. That should be pointed upwards, and the felt-like side should be facing downwards. I hope this helps!

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🌬️ Breathe easy, cook confidently—fresh air is just a twist away!

SEAMLESS INTEGRATION - Designed to fit perfectly with COS-5MU30 and COS-5MU36 models without any modifications.
LIGHTWEIGHT DURABLE - Compact 240g carbon fiber filter built to last and maintain peak performance.
LONG LASTING FRESHNESS - High-quality activated charcoal filter keeps your kitchen smelling clean for up to 6 months.
EFFORTLESS INSTALLATION - Twist and lock design means no tools, no hassle—upgrade your kitchen air in seconds.
DUCTLESS VENTILATION MADE EASY - Transforms your under-cabinet range hood into a powerful recirculating system—no ductwork needed.

The Cosmo Range Hood Filter (5MU30 / 5MU36 - CFK4) is a premium activated charcoal filter designed for ductless kitchen ventilation. It installs effortlessly with a twist-and-lock mechanism, fits specific Cosmo range hood models, and provides up to 6 months of superior odor absorption, ensuring your kitchen stays fresh without any duct modifications.

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Brand	Cosmo
Model	5MU30-CFK4
Product Dimensions	17.78 x 17.78 x 2.54 cm; 240 g
Part Number	Filter
Compatible Devices	cooker hood
Material Type	Carbon Fibre
Included Components	Carbon Filter Kit
Batteries included?	No
Batteries Required?	No
Item Weight	240 g

Cosmo Range Hood Filter Genuine Filter(s) (5MU30 / 5MU36 Filter - CFK4)

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