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Silent 150

Ultra Quiet Kitchen & Utility Extractor Fan

The Silent 150 is an innovative domestic axial extractor fan designed as a low noise extractor fan. The Silent 150 is designed for utilities and kitchens and comes fitted with a pilot light, backdraught shutter and airflow guide vanes as standard.

The Silent 150 is a 150mm domestic axial extractor fans for wall or ceiling installations, designed to solve ventilation problems in utility rooms and kitchens. Fitted with motors mounted on silent elastic blocks, the fans deliver incredibly quiet running and exceptional performance with stylish features such as a backdraught shutter.

The Silent 150 is the ideal low noise extractor fan for any home.


Key Features

  • Adjustable Timer
    Adjustable Timer
  • Quiet Operation
    Quiet Operation

    Designed to perform with low noise levels.

  • 7 Year Warranty
    7 Year Warranty

    Fans covered by the increased warranty are the 'S', 'T' and 'HT' models.

  • Adjustable Humidity Sensor
    Adjustable Humidity Sensor

    Relative humidity level can be set between 60% and 90% RH.

  • 5 Year Warranty
    5 Year Warranty
  • Backdraught Shutter
    Backdraught Shutter

Adjustable Timer

After disconnection, the shut off time can be delayed between 1 and 30 minutes.

Adjustable Humidity Sensor

The level of humidity for the bathroom can be chosen from between 60% and 90% RH. The Silent 150 extractor fan will continue to work long enough to reach the selected level.


The fan is fitted with a pullcord override.

Product Codes
Product Code
Product Name
Product Description
Silent 150
Silent 150
Adjustable Timer
Silent 150
Adjustable Timer, Adjustable Humidity Sensor
Silent 150
Silent 150
Adjustable Timer, Adjustable Humidity Sensor, Pullcord
Product Specification

Performance Curve

Related Documents
Question & Answers

Should I remove the tape on the inside of the Silent HT fan?

No, this is Hydroscopic tape, it is to protect the sensor from moisture, but will allow vapour through. Removing this may damage the sensor and invalidate the warranty.

Why is my Silent extractor fan running continuously?

This may be due to incorrect wiring, please have a qualified electrician check this with the install guide and speak to the EnviroVent technical department if required. It may also be due to an incorrectly set humidity sensor (model dependant). If a humidity sensor version is fitted the sensitivity can be adjusted on the extractor fan. Adjusting clock wise will make the sensor less sensitive, anticlockwise will make the sensor more sensitive to humidity.

My Silent extractor fan will not run:

If an extractor fan will not operate, a qualified electrician will need to check the wiring, ensuring the fan is wired correctly and receiving power.

How do I get the front cover off my Silent extractor fan?

Always isolate power first. The cover can be removed by firstly pushing the small reseeded retaining point on one of the edges of the extractor fan, then slowly unclipping the rest of the cover with a small flat screw driver.

What wiring does the Silent T and HT require?

These extractor fans require a permanent live and neutral and a switch live (to trigger the fan)

Can I fit a 230V extractor fan in zones 1 or 2 of a bathroom?

Yes, as long as the circuit is protected by a 30mA RCD
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