which size of the screw should be used for fixing to ceiling ?

I would glue they fit well if you cut the right size hole

What is total micemebt

Sorry, don't understand 'micemebt. I found the unit to be well made and not too obtrusive. However, I couldn't fins a way to adjust the inner control disc from below. I could only adjust it from above, which for me is in the loft. I could be missing something. I also bought back draft flaps which I put in line on the exhaust side of the fan. This stops unwanted draft coming in on windy days.

Tried to install today, and I'm stuck. How do you secure the white white metal collar to the steel duct? It just falls straight through

There's a twisting motion to secure to an internal shallow thread if I recall. Then the centre bit can rotate against a screw/nut to enlarge or shrink the hole/gap.

Does this require a fixing collar?

I didn't use one, the 100mm hole was tight enough that it didn't need one

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Kair Ceiling Extract Valve 125mm - 5 inch White Coated Metal Vent

Kair Ceiling Extract Valve 125mm - 5 inch White Coated Metal Vent

Product ID: 60919461

Details

Brand
Kair
Exterior finish
Powder-Coated
Global Trade Identification Number
Inlet connection size
5 Inches
Inlet connection type
Threaded
Item dimensions L x W x H
16.5 x 16.5 x

🎨White powder-coated metal finish

🔄Rotatable airflow control disc

⚙️125mm adjustable spigot fit

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KD 11.95

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Sold byAmazon KUWAITDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌬️ Elevate your air game with style and precision!

DURABLE CLEANABLE - Epoxy-coated steel ensures long-lasting durability and a wipe-clean surface for hassle-free maintenance.
SEAMLESS INTEGRATION - Flush-fit design with a sleek white powder-coated finish that complements modern interiors effortlessly.
UNIVERSAL COMPATIBILITY - Fits standard 125mm round pipes and 127mm flexible hoses for versatile installation options.
PRECISION AIRFLOW CONTROL - Easily adjust and lock airflow with a smooth rotating disc for perfect ventilation balance.
UK MADE QUALITY ASSURANCE - Crafted in the UK with galvanised steel mounting ring and airtight gasket for reliable, regulation-compliant performance.

The Kair Ceiling Extract Valve 125mm is a high-quality, white powder-coated metal vent designed for adjustable ceiling air extraction. Compatible with standard 125mm round pipes and 127mm flexible hoses, it features a rotatable control disc for precise airflow adjustment and a sleek, flush-fit design ideal for modern interiors. Made in the UK with durable epoxy-coated steel and a galvanised mounting ring, it ensures airtight sealing and compliance with building regulations, delivering quiet, efficient ventilation.

Specifications

ASIN	B004X4SC90
Batteries Required?	No
Batteries included?	No
Best Sellers Rank	15,076 in DIY & Tools ( See Top 100 in DIY & Tools ) 310 in Bathroom Hardware
Colour	White
Customer Reviews	4.4 4.4 out of 5 stars (279)
Date First Available	19 April 2011
Item Weight	358 g
Item model number	5060272541408
Manufacturer	Kair
Material	Epoxy Coated Steel
Number of Pieces	1
Part Number	DUCMW124
Product Dimensions	16.51 x 16.51 x 5.99 cm; 358.34 g
Size	125mm Extract

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TrustScore 4.5 | 7,300+ reviews

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