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

Product ID: 520763191

Details

Brand
Cosmo
Compatible devices
cooker hood
EU Spare Part Availability Duration
6 Months
Manufacturer
Cosmo
Material
Carbon Fibre
Number of items
1

🕒6-month long-lasting filter life

🌬️Activated charcoal odor absorption

🛠️Tool-free twist & lock install

Description

🌟 Breathe Better, Cook Happier — The Filter Your Kitchen Deserves!

SLEEK SUBTLE - Maintains your range hood’s original design—no bulky add-ons, just pure function.
SUSTAINED PERFORMANCE - Replace every 6 months to maintain peak filtration and keep your kitchen atmosphere pristine.
SEAMLESS COMPATIBILITY - Specifically engineered for COS-5MU30 & COS-5MU36 models—perfect fit, zero modifications.
EFFORTLESS INSTALLATION - Twist and lock design means no tools, no hassle—upgrade your kitchen air in seconds.
ODOR FREE KITCHEN VIBES - Premium activated charcoal traps and neutralizes cooking odors for fresher, cleaner air.

The Cosmo Range Hood Filter (5MU30 / 5MU36 - CFK4) is a high-quality activated charcoal filter designed for ductless range hoods. It offers easy, tool-free installation with a twist-and-lock mechanism, fits perfectly without any modifications, and effectively captures kitchen odors for up to 6 months, ensuring a fresher cooking environment.

Specifications

ASIN	B076FD4WV1
Brand Name	Cosmo
Compatible Devices	cooker hood
Customer Reviews	4.4 4.4 out of 5 stars (1,000)
EU Spare Part Availability Duration	6 Months
Included Components	Carbon Filter Kit
Item Type Name	Cosmo Range Hood Filter
Manufacturer	Cosmo
Manufacturer Part Number	Filter
Material Type	Carbon Fibre
Model Number	5MU30-CFK4
Number of Items	1
Product Grade	new
UPC	850036237051 602919821648
Unit Count	1.0 count

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