The best practically silent 4-inch extractor fan for getting rid of smells, moist air, and airborne pollutants in bathrooms, kitchens is the ESTRA extractor fan.

Ventilation Fan:

A single-speed, low-profile, simple-to-install extractor fan

Comes in many different designs

intended to be connected to an appropriate on/off switch

Suitable for a variety of uses, such as zones 1 and 2 restrooms, shower rooms, and bathrooms

Suitable for placement on walls or ceilings

15W is the electrical power rating.

Rated IPX4

Suits Building Regulations Part F for Installing Bathrooms

The centre of the front grille's bottom edge is where the cable entry hole is located.

Extremely quit noise operation so it’ll not get in the way of any other sound

Suitable for kitchens, bathrooms and toilets. Designed to be fitted into walls and ceilings. Slim profile compact, attractively styled, easy to wipe clean and duct over short lengths. Ideal solution for removing damp moist air, odours and airborne pollutants from kitchens, toilets and bathrooms.

The front grille's approximate dimensions are 158 by 158 (mm).

Strong Airflow: 25 litres per second or 90 m³/h one of the greatest airflow speeds available for a timed, 100mm bathroom extractor fan.

32 dB(A) of low noise at three metres. A quiet extractor fan with a 10W power consumption is provided. Durable Motor with Inbuilt Safety.

Modern Compact Design with a Slim Line. High Flow, Low Noise Operation. Integrated Smart Delay Timer with 2-to 25-minute adjustable delay. Glass finish, easy to wipe.

Either wall or ceiling mounted.

The white fan comes standard with no speed settings or timers. However the other 3 do come with different speed and timers in it.

This product comes with 2 years warranty to put you at ease. T&Cs Apply.