What is the air flow in cubic metres on this? The openings look quite narrow.

Iv' e used these on a number of bathrooms, and are far better than those ugly louvered things. Airflow will be fine with any 4" fan. The centre is adjustable, so you can make the opening bigger.

what size hole saw do i need for the ceiling opening?

About 102mm or 103mm for a close fit. There are circular saw blades of this size on the market.

can this be soffit fixed?

Unable to answer from personnel experience as used on a ceiling application, but depends upon depth of soffit material but worked fine on 12mm lasterboard. Is thinner material it may require appropriate packing.

Can I use this as a wall vent

Yes internally, as long as there is a large enough size hole to accommodate the vent and any associated ducting.

Kair Plastic Round Ceiling Vent 125mm 5 Inch Diffuser Extract

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Description

🌬️ Elevate your airflow game with style and ease!

SEAMLESS INTEGRATION - Flush-fit design blends effortlessly with ceilings and walls for a sleek, modern look.
EFFORTLESS MAINTENANCE - Wipe-clean plastic diffuser with retaining ring ensures hygiene and easy upkeep without hassle.
TRUSTED QUALITY VALUE - High-grade ABS plastic construction backed by strong 4.4-star reviews and proven durability.
VERSATILE AIRFLOW CONTROL - Dual-purpose valve lets you switch between extract and supply modes, maximizing HVAC flexibility.
QUICK SECURE INSTALLATION - Easily connects to 127mm flexible hoses with a hose clip for fast, reliable setup.

The Kair Plastic Round Ceiling Vent 125mm is a high-quality, dual-purpose air diffuser and extract valve designed for domestic use. Its flush-fit, aesthetically pleasing design fits seamlessly into ceilings or walls, while the adjustable, wipe-clean plastic diffuser with retaining ring ensures easy maintenance. Compatible with 127mm flexible hoses, this vent offers versatile airflow control and reliable performance, making it a smart choice for modern HVAC setups.

Specifications

ASIN	B004X4SJPM
Batteries Required?	No
Batteries included?	No
Best Sellers Rank	42,166 in DIY & Tools ( See Top 100 in DIY & Tools ) 165 in Registers, Grilles & Vents
Colour	White
Customer Reviews	4.4 4.4 out of 5 stars (735)
Date First Available	19 April 2011
Item Weight	222 g
Manufacturer	Kair
Manufacturer reference	DUCVKC356F
Material	ABS Plastic
Part Number	DUCVKC356F
Product Dimensions	8 x 16.99 x 16.99 cm; 222.26 g
Size	125mm

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NT$1884

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Kair Plastic Round Ceiling Vent 125mm - 5 inch Diffuser/Extract Valve with Retaining Ring

Description

Specifications

Common Questions