Ventilation
Commissioning and Testing

Building Compliance Testing Limited can provide you with a fast and cost effective Domestic Ventilation Commissioning and Air-flow Testing across the UK for Part F Building Regulation compliance.

Domestic Ventilation Commissioning and Air-flow Testing

Air-flow Testing refers to extractor fans, like you would find in a toilet, bathroom or kitchen. These are tested to see how much air they extract. Commissioning refers to more complicated ventilation systems, such as Mechanical Ventilation Heat Recovery (MVHR) that have adjustable terminals, inlets and outlets. These need to be balanced, to make sure the correct amount of air is either being
extracted from or supplied to every room within the building.

The tests must be undertaken using UKAS calibrated equipment and should be conducted by an engineer registered with a competent scheme.

Our Engineers will always carry out a pre-test inspection of the ventilation system, including duct runs, terminals and test all functionalities.

design reviews – site inspections – pretesting – diagnostics – site management training and education 

Frequently Asked Questions

What Ventilation System have I got installed, and why?
  • If your dwelling has extractors within sanitary areas, wet areas and the kitchen that operate
    intermittently, or is triggered by a light, PIR or humidity switch and has trickle vents installed in your
    external windows, it is likely you have a System 1 Intermittent Extract and Natural Ventilation. A System 1 is
    designed with an Air Tightness greater than >4.00m-3.h.m-2 at 50 Pascals to operate efficiently.
  • If your dwelling has extractors within sanitary areas, wet areas and the kitchen that operate
    continuously and has trickle vents installed in your external windows, it is likely you have a System 3
    Mechanical Extract Ventilation. A System 3 is designed with an Air Tightness <4.00m-3.h.m-2 at 50
    Pascals to operate efficiently.
  • If your dwelling has ventilator terminals in all rooms and has a central controller unit, and no trickle vents,
    it is likely you have a System 4 Mechanical Extract with Heat Recovery Ventilation. A whole dwelling
    ventilation system is designed with an Air Tightness <3.00m-3.h.m-2 at 50 Pascals to operate efficiently.
  • It should be noted the lower the dwellings Air Tightness, the less uncontrolled/ natural ventilation there
    will be and as such the less unwanted heat loss however the air change rates will reduce, hence the
    need for a Mechanical Extract and Heat Recovery Ventilation System.
How do I prepare for a Ventilation Test?

Check what fans you are buying and for what use. For instants extractors within cooking spaces require.

We’re friendly and knowledgeable bunch so why not get in touch for a chat. You can always contact Building Compliance Testing with any questions through phone, email or our online chat service.

Don’t worry, we don’t charge for advice given over the phone, so why not ask for a free quote?

01621 493 594 | contact@buildingcompliancetesting.com

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