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Bristol - Domestic Fan Pressure Testing - 0117 212 0189
The office that covers this area is: Cardiff
Do I Need An Air Leakage Test?
Planning your test in advance will help our experience air assessment team covering Bristol to determine how many tests you'll need ahead of time per property and will be happy to offer advice on the best ways to gain your air permeability rating.
Domestic properties and commercial buildings over a certain size must have a passing air leakage certificate before the property can be handed over following a sale. All new buildings in England and Wales have had this requirement since 2006 and in Scotland this has been mandatory since 2010.
Part L of the Government building regulations explains that on a large plot of new houses that are built to a similar specification, only a sample of the houses will need to be air tested.
When Should The Test Take Place?
For obvious reasons, an air pressure test is generally one of the last surveys to be undertaken once all the walls, windows, doors etc. are complete and sealed to stop any air escaping and prevent drafts through the property. The building envelope will also need to be completed.
What Does An Air Leakage Test Involve?
Air tests cannot be carried out if the wind speed is more than 13mph - 3 metres per second is the ideal wind speed when undertaking an air test in Bristol. An air test involves placing a large fan, or several fans, to an opening within the property; usually a doorway. The fans will increase and decrease in speed that will in-turn change the building's air pressure and record the results.
There should be no outside access once the test has begun for approximately 90 minutes so plan accordingly. Workers can still do their job inside the property, within reason, though may feel some discomfort due to the noise of the fan and the draught that will be felt throughout the building.
Whilst the air tightness test is being undertaken, furniture will not be affected but smaller items such as paper must be held down or removed completely so they're not blown about. The pressure of the room will be tested and as such all windows and doors that lead outside must be securely closed to avoid them swinging open and the test being abandoned. Similarly, all internal doors should be wedged open to avoid being slammed shut.
How Many Properties Need An Air Tightness Test?
If you have 4 or less properties of the same type then only one test needs to be undertaken per type. If you have more than 4 but less than 40 dwellings of a type then you need at least two tests to be done on each type. Finally, if there are more than 40 properties of a particular type then at least 5% of each type needs to be tested UNLESS the first 5 get a passing score - then this can be dropped to just 2%.
What Air Permeability Rating Do I Need?
A passing score in Bristol is 10 m³/(h.m²) for an air permeability rating which resembles the amount of uncontrolled air that's leaking from the dwelling. Should the test fail, our air tightness team will help you identify where the leakages are happening in the hope that a passing score will be achieved after a re-test.
For further Domestic Fan Pressure Testing information for your area, be sure to check out Air-Testing-Bristol.co.uk.
Our other services include:
Part F Ventilation Testing, SAP Extension Calculations, Code 4 Sustainable Homes, Environmental Noise, Thermography, Energy Statements, Acoustic Testing, Part E, Part G - Water Calculations, Sustainability Statements, On Construction EPC, SAP Conversion Calculations, SAP Calculations (TER/DER),
Domestic Fan Pressure Testing can also be known as:
Domestic Air Testing, Air Pressure Testing, House Leakage Testing, Domestic Air Tightness Testing, Air Testing, Domestic Air Pressure Testing, Domestic Air Integrity Testing, Domestic House Leakage Testing, Air Tightness Testing, Fan Pressure Testing, Air Leakage Testing, Domestic Air Leakage Testing, Air Integrity Testing,
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Company No. 06728970