top of page

Approved Document F - Do I Need To Fit Trickle Vents?

  • Mar 10, 2022
  • 2 min read

The changes, require the majority of replacement windows and doors to be fitted with trickle vents.


We would recommend you read the Approved Document in full to make sure that you understand all of the changes and requirements. Approved Document F: Volume 1 applies to dwellings


Changes will proceed as planned and come into effect on the 15th June 2022.


ree

The following questions should be considered: Does The Property Already Have Trickle Vents?

  • Yes – The replacement windows and doors must also have trickle vents (or another method of background ventilation), and the size of these vents must not be smaller than those installed in the previous windows.

  • No – go to the next question



Are You Replacing Less Than Or Equal To 30% Of The Windows & Doors In The Property?

  • Yes – No trickle vents are required provided that no more than one other minor energy efficiency measure has been completed at the property such as cavity wall insulation.

  • No – Go to the next question

Please note that windows installed post June 2002 are an energy efficient measure in the same way as cavity wall, draft proofing, loft insulation top up or external wall insulation.

Is There A Mechanical Ventilation With Heat Recovery System Installed At The Building Or Any Other Ventilation Provisions That Can Be Demonstrated To A Building Control Body That They Comply With The Requirements Of Paragraph 3.2?

  • Yes - No trickle vents required

  • No – Go to next question

Paragraph 3.2 reads as follows; When other building work is carried out that will affect the ventilation of the existing dwelling, for example: a. replacing a window or door b. doing energy efficient work the ventilation of the dwelling should either: a. meet the standards in the relevant approved document b. not be less satisfactory than before the work was carried out NOTE: Ventilation through infiltration should be considered to be part of the ventilation provision of a dwelling. Reducing infiltration might reduce the indoor air quality of the dwelling below the standards given in Appendix B.

Does The Property Have Continuous Mechanical Extract Ventilation (a ducted system where a single fan draws air continuously from each room constantly or individual room extract fans)?

  • Yes – No trickle vents required in wet rooms (kitchen, utility, bathroom, WC), but you must fit 4000mm² Equivalent Area in all other rooms.

  • No – Go to next question



Are There Any Other Ventilation Provisions That Can Be Proven Will Not Make The Previous Air Infiltration Of The Property Worse?

  • Yes – Record these provisions and save to the work file, they will be required to be assessed at time of inspection of this property.

  • No – Fit trickle vents



Can You Feasibly Adopt The Minimum Equivalent Vent Sizes Set Out In Table 1 In Each Window?

  • Yes – Install the vents as per the table below

  • No – Install vents as close in size to the table below as possible

The Minimum Equivalent Vent Sizes table
The Minimum Equivalent Vent Sizes table

Please note that these changes are for England ONLY. There are no current changes to the Building Regulations in Wales.

30 Comments


Jim Raca
Jim Raca
18 minutes ago

The Wireless and Mobile Backhaul Advanced Technologies Market is experiencing robust growth, fueled by surging global data traffic, widespread 5G rollout, and ever-increasing demand for high-speed, low-latency connectivity across both urban and rural areas. Mobile operators are modernizing their backhaul infrastructure to accommodate the proliferation of internet-connected devices, the rise of IoT, and bandwidth-intensive applications like video streaming, AR/VR, and cloud services. Expanding telecommunications networks in emerging regions such as Asia-Pacific, Latin America, and Africa has heightened demand for cost-effective, scalable wireless backhaul solutions that support diverse topographies and regulatory landscapes.

Get a sample of the report @ https://www.emergenresearch.com/request-sample/3757

The growing reliance on cloud-native, software-defined architectures drives the adoption of advanced technologies including microwave and millimeter-wave (mmWave) radio, fiber-wireless hybrid networks, Small Cell…

Like

prathmeshgawade552
Jul 21

✅ How Cloud Applications Empower Remote Workforces


A cloud application is a software program that runs on remote servers hosted on the internet rather than being installed and operated directly on a local device or server. These applications leverage the power of cloud computing to deliver seamless, scalable, and cost-effective solutions for businesses and individuals alike.

What Is a Cloud Application?

Cloud applications, also called cloud-based apps, rely on the cloud infrastructure to store data, process workloads, and provide access to users anywhere, anytime, through a web browser or a thin client. Unlike traditional desktop software, a cloud application doesn’t need heavy hardware resources on the user’s end.

Examples include webmail services, online document editors, video conferencing platforms, and business management tools.

Like

yuri miller
yuri miller
Jul 17

The Ophthalmic Viscosurgical Devices (OVDs) Market is experiencing steady growth, driven by the increasing prevalence of ophthalmic disorders, a growing elderly population, rising demand for cataract and refractive surgeries, and ongoing innovations in viscoelastic materials. Key factors influencing the market include:

Rising prevalence of eye disorders

The growing incidence of age-related eye conditions such as cataracts, glaucoma, and retinal detachment is a key driver of demand for ophthalmic viscosurgical devices. Cataract remains one of the leading causes of preventable blindness globally, and OVDs play a critical role in enhancing the safety and effectiveness of cataract surgery.

Growing geriatric population

An aging global population is directly contributing to the rise in eye surgeries, particularly cataract surgeries, which increases demand for OVDs. The World Health…

Like

Silas Barton
Silas Barton
Jul 10

Idealab UAE is a Dubai‑based leader in designing and manufacturing premium laboratory furniture, fume hoods, standalone lab units, and utilities tailored for modern scientific environments. With over 25 years of experience, we combine customization, durable, chemical‑resistant materials, and modular designs to meet unique lab layouts and safety requirements. Our client‑centric approach ensures seamless collaboration—from initial consultation through precision fabrication to professional installation. By prioritizing safety, efficiency, and sustainability, we deliver innovative, ergonomic solutions that enhance research workflows and protect users. Trusted across educational, industrial, and research sectors, Idealab transforms visionary ideas into high-performance laboratory realities.

Website: https://idealabsuae.com/ 

Like

vandana.manturgekar
Jul 10

Single-use ophthalmic surgical devices are specialized instruments designed for one-time use during eye surgeries to ensure optimal sterility, precision, and patient safety. These devices include disposable forceps, scissors, speculums, cannulas, and phacoemulsification tips used in procedures like cataract removal, corneal transplantation, and glaucoma surgeries. The shift toward single-use tools helps minimize the risk of cross-contamination and postoperative infections, particularly in sensitive eye tissues. They also eliminate the need for time-consuming sterilization processes, ensuring that surgeons always work with instruments in pristine condition.

The demand for single-use ophthalmic surgical devices is rising due to increased awareness of infection control, the growth of outpatient surgical centers, and advancements in minimally invasive ophthalmic procedures. These devices also offer consistent quality, which is essential for…

Like
CPA-approved-craftsman-no background.gif

Address

Andy Glass Windows

Unit 78, Sandford Lane Industrial Estate
Sandford Lane, Kennington,
Oxford, Oxfordshire
OX1 5RP

01235 530035
E sales@andyglasswindows.co.uk

© Copyright 2000-2024 Andy Glass Windows | Company name - AGW Ltd trading as Andy Glass Windows | ID number - IFD66870 
Registered England & Wales | Company Reg. No. 02657318 


Website terms and privacy policy

Important Business Information

Fensa Logo_11919
  • black_point
  • Facebook
  • Twitter
  • Pinterest
  • Instagram

This website uses some supplier stock photos for illustration purposes only

Accredited

Installers

bottom of page