Air testing, also known as airtightness testing, is a mandatory requirement for all new and renovated buildings in London. Air testing London is an essential step in ensuring that buildings are energy-efficient, comfortable, and healthy places to live and work.
In this article, we will discuss what is required as part of an air permeability or airtightness test in London and why it is important.
What is Air Permeability Testing?
Air permeability testing is the process of measuring the amount of air leakage from a building. The test is conducted using a calibrated blower door system, which includes a fan, pressure gauges, and a computerised data-logging system to record the results
The fan is used to depressurise the interior of the building, which creates a pressure difference between the inside and outside. The technician will then measure the rate of air leakage through the building’s envelope, including walls, roofs, floors, doors and windows.
Why is Air Tightness Testing Important?
Air leakage can have a significant impact on a building’s energy efficiency and indoor air quality. Air leaks can cause heat loss in the winter and heat gain in the summer, which can lead to increased energy consumption and higher energy bills. Additionally, air leaks can allow moisture and pollutants to enter the building, which can affect the health and comfort of occupants.
What is Required as Part of an Air Permeability Test London?
During the planning stage for any new build development, an air tightness testing team will advise and help ensure any air leakage is kept to a minimum. This will ensure the development complies with Building Regulations and that energy is saved.
Since changes to Part L of the Building Regulations in 2022, all newly built homes in London must undergo air testing to meet the standard. This test finds leaks that allow draughts to enter the building and heat from outside to escape through gaps in the fabric of the building.
Typically, air leakage is measured in air changes per hour (ACH) or litres of air lost/second per meter squared (l/s/m2). The lower the result, the more air tight the building is.
To ensure that an air permeability test is accurate and reliable, the following requirements must be met:
Pre-test Preparations
The building must be in a state of readiness, with all external doors and windows fitted and operational. Internal doors should be open, and any ventilation systems should be turned off.
Airtightness testing is a government-regulated procedure to measure the amount of air that seeps through gaps and cracks in buildings. It’s a crucial part of building regulations in London, and if you own a residential property or commercial business you need to ensure that you meet these targets.
Air leakage can cause significant heat loss, higher C02 emissions and expensive heating bills. This can be a real pain for homeowners, landlords and businesses so it’s important that buildings are properly sealed in the first place.
We’ll start by carrying out a thorough inspection of your property, ensuring that it’s ready for testing. This includes a full building check, which will include walls, doors, windows and skirting.
Air Testing Equipment
A calibrated blower door system must be used, which includes a fan, pressure gauges, and a computerised data-logging system to record the results.
Air Test Procedure
The test should be conducted in accordance with the UK standard for airtightness testing. The technician will seal all external openings, attach the fan to a designated opening, and then depressurise the building to a specified pressure difference (usually 50 Pascals).
Air Test Results
The technician will record the results of the test, which will include the air permeability rate (measured in air changes per hour, or ACH), and any areas of the building that failed to meet the required standard.
Air Test Reporting
The technician will prepare a written report that includes the test results, any areas of concern, and recommendations for remedial actions. This report must be submitted to the building owner and to the relevant building control authority.
Air Testing London – Book Now
Air testing London is essential in ensuring that Greater London buildings are energy-efficient, comfortable, and healthy places to live and work. By meeting the requirements for an air permeability or airtightness test, building owners can ensure that their buildings meet the required standards and regulations.
With the right equipment, procedures, and reporting, an air permeability test can provide valuable insights into a building’s energy efficiency and indoor air quality, helping building owners in London make informed decisions and take appropriate actions.
