Passivent A121 Humidity Controlled Extract Valve

Passivent A121 Humidity Controlled Extract Valve

  •   In Stock

Show Excluding Vat
£88.13 £73.44
Need Help ? Get in touch


Passivent A121 Humidity Controlled Extract Valve

Passivent A121 Humidity Controlled Extract Grille is designed for ‘wet rooms’ and responds automatically to changes in relative humidity, opening to meet demand. Works with most central mechanical extract systems to reduce heat loss and save energy.  

Main Features

  • Can be used with the Passivent central extract units (MEV) for an on demand central system
  • Mechanical operation, no electrical connection required.
  • Virtually maintenance free
  • Can be wall or ceiling mounted

Technical Features

  • Humidity sensitive operation between 30 to 60% relative humidity.
  • Ventilation flow rate range of 4l/s to 21l/s
  • Connects to duct size of 125mm diameter
  • Front grille removable for cleaning
  • Recommended for use with demand controlled MEV units only, eg - Passivent iMEV A151 DCWCP



BPC have years of experience in delivering equipment around the UK and other Worldwide destinations. Our dedicated dispatch team work hard to ensure the highest standards are met so that your goods arrive on-time and in pristine condition.

Our market knowledge and experience allow us to match our service to meet your requirements swiftly and safely.

Free Delivery

We offer free delivery on any order over £250 to any mainland UK or Ireland address  

Worldwide Delivery

Worldwide delivery is possible on almost all our products at low costs, delivery to countries outside the EU are normally delivered to the nearest customs office, port or terminal for the purchaser to collect and complete custom clearance.

Please contact us to confirm shipping cost and availability.  

End-To-End Support Delivery is available within 48-72 hrs, depending on method of transport, for hundreds of stock items.

Customers receiving a pallet delivery will be emailed on day of dispatch advising of delivery date. Parcel deliveries will be notified via email or SMS directly from DPD.

These checks are part of a unique commitment to building relationships with customers, understanding their specific delivery needs and responding to them positively and promptly.  

We deliver on Service

Key components such as ductwork and fittings plus the most popular selling MVHR units are kept in stock in our UK-based warehouse, which means that you receive the best possible delivery dates.

All goods are expertly packed by a professional team so that your equipment is received in pristine condition ready for installation.

All deliveries co-ordinated to suit your specific requirements and construction programme.

Delivery Partners

We only use the couriers with the highest standard of service that include

  • Fastway
  • DPD
  • Montgomery Transport
  • Liam Connolly Roadfreight Ltd
  • Europa Worldwide


Write Your Own Review
You're reviewing:Passivent A121 Humidity Controlled Extract Valve
Your Rating


Keep up to date with offers, products, and company news, direct to your inbox

By signing up, you agree to our privacy policy, terms & conditions

Installation Service

If you would like to learn more about our installation service, please contact us:

Call us on 028 28 275 150 or click below to contact us online

Trade Discount

If you are a developer or installer, apply for a trade discount online.

Click below for easy application

Distributors for the worlds leading ventilation manufacturers

We are distributors and stockists of the leading ventilation products