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)

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

Product ID: 52104956

Details

Air Filter Construction
Panel
Brand
COSMO
Compatible Devices
COS-5MU30
Compatible Vent Hood Models
Cosmo
EU Spare Part Availability Duration
6 months
Manufacturer
Cosmo

🌿Activated charcoal power

🔄Easy replaceable panel

🛡️6-month odor defense

HK$254

Duties & taxes included

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Description

🌬️ Elevate your kitchen air game—because fresh is the new luxury!

TRUSTED BY THOUSANDS - Join over 1,000 satisfied users who rate this filter 4.4 stars for consistent odor control.
BREATHE FRESH ALWAYS - High-grade activated charcoal traps and neutralizes kitchen odors for a fresher cooking space.
EFFORTLESS MAINTENANCE - Simple panel design makes filter replacement a breeze every 6 months—stay ahead of lingering smells.
TAILORED COMPATIBILITY - Specifically engineered for COS-5MU30 and COS-5MU36 models—perfect fit, zero guesswork.
DURABILITY MEETS DESIGN - Premium materials ensure long-lasting performance, keeping your kitchen air crisp and clean.

The Cosmo Range Hood Filter (5MU30 / 5MU36 - CFK4) features a high-quality activated charcoal panel designed to capture and minimize kitchen odors effectively. Compatible exclusively with COS-5MU30 and COS-5MU36 models, this replaceable filter lasts up to 6 months under normal use, ensuring sustained freshness and optimal ventilation performance.

Specifications

ASIN	B076FD4WV1
Air Filter Construction	Panel
Best Sellers Rank	#218,801 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #293 in Range Hood Filters
Brand Name	COSMO
Common Applications	Food Processing
Compatible Devices	COS-5MU30, COS-5MU36
Compatible Vent Hood Models	Cosmo COS-5MU36
Customer Reviews	4.4 4.4 out of 5 stars (1,050)
EU Spare Part Availability Duration	6 months
Included Components	Carbon Filter Kit
Item Dimensions L x W x Thickness	7"L x 7"W x 1"Th
Item Type Name	Cosmo Range Hood Filter
Manufacturer	Cosmo
Manufacturer Part Number	Filter
Material Type	['Charcoal']
Model Number	5MU30-CFK4
Number of Items	1
Number of Packs	1
Product Grade	new
UPC	850036237051 602919821648
Unit Count	1 Count

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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HK$254

Duties & taxes included

In stock

Sold byAmazon Hong KongDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Hong Kong.

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