FAQ & Myth Buster for Retrofit Coordination, PAS2035 & Ventilation Testing

What is the benefit of testing background ventilation for Pathway A and B?
Carrying out background ventilation testing will provide you with evidence as to whether you require additional background ventilation. This may negate the need to e.g. install trickle vents or under door cuts.

I have been told that I still need to install background ventilation regardless of evidence from background testing, is that correct?
Myth Buster
NO, you do NOT have to install additional background ventilation if the testing that has been carried out evidences that the ventilation is adequate. This is a recognised process by TrustMark and BEIS for evidencing compliance under PAS2035.

Who can test background ventilation on properties?
Trained background ventilation testers who are registered with The IAA can carry testing using the approved process. All trained and registered testers are listed here. For more information on training and requirements see here.

Is the background ventilation testing process exclusive to IAA members and do I have to use the Build Test Solutions Pulse kit?
Myth Buster

NO, there is no requirement for you to be a full member of the IAA. Anyone can take part in the training and become certified to operate under the scheme. Once certified, the process entails testing of whole building background ventilation and in some cases the testing of individual rooms. These tests can be completed with either the BTS Pulse kit or a blower door fan.

What purpose does the IAA Background Ventilation scheme serve?
The scheme is in place to ensure that a robust and fully auditable process is followed. We require evidence of pre and post works background ventilation test results, photos and floor plan drawings to prove the presence of existing wet room ventilation and to ensure due consideration of factors such as mould and condensation risk has been taken into account. We then randomly sample jobs for audit to make sure the process is being upheld and adhered to. 

What type of organisation membership do I need to carry out Retrofit assessment or coordination?
Myth Buster
To carry out retrofit assessment / coordination you just need to be qualified as an assessor / coordinator and registered with a certification body such as Elmhurst or ECMK.

As an installer, do we need to replace IEV with MEV in all cases?
Myth Buster
NO, this is not a requirement under PAS2035 unless you are installing partial IWI and omitting wet rooms in line with the BEIS IWI technical guide.

Best practice is to test the IEV is still working. If it is then you do not need to replace it.  Whilst a full airflow test may be sensible it is sufficient to prove that there is airflow (such as holding a tissue over the fan) and that the fan works and is in good condition.

Does Pulse testing adhere to PAS2035 as evidencing background ventilation?
Myth Buster
YES, this process has been approved by TrustMark who are the only body responsible for compliance under PAS2035 discharged through Retrofit Coordination certification bodies.

Who decides what the requirements are for retrofit coordination and assessment?
Myth Buster
This is primarily dictated by PAS2035 and the associated documents. The only authorised bodies who can make changes to the normative requirements under PAS 2035 is BEIS. Changes to PAS2035 go through a formal process of review by a Steering Group and are not introduced ad hoc without formal consultation.
How do I get trained to carry out background ventilation?
Contact training@theiaa.co.uk to book on a course
The training consists of a two-day course at £425 + VAT per delegate which is both practical and knowledge based.

On successful completion you will gain a certificate of competency in background ventilation assessment of existing buildings allowing you to register with the Elmhurst Air Tightness Scheme and also to become an IAA Approved Background Ventilation Assessor to enable you to use the process.

How do I register on the IAA Background ventilation scheme?
On successful completion of the training course you will need to sign up to The IAA scheme at a cost of £250 per annum (this includes registration, annual surveillance and CPD). Scheme registration is free to IAA end-to-end members.

To enable you to register with The IAA you will also need to register with the Elmhurst Air Tightness Scheme or ATTMA, joining fees will apply to both schemes. For more information on current pricing please contact the Elmhurst Air Tightness Scheme or ATTMA directly.

Who should I speak to if I need more information?
For queries relating to training or using The IAA’s testing service contact The IAA through enquiries@theiaa.co.uk