"Hello shaun",
Sorry that it is not `good news` in your situation - having been asked for the Part F Certification.
Usually You would Notify the necessary Competent Persons Scheme for Ventilation - who would in turn notify the LABC that your installations are Building Regulations Compliant.
I should also mention that there are stricter regulations for Fans etc. in New Builds - I suggest that You definitely read the Ventilation Compliance Guide.
I think that in New Builds where there has to be a certain `Air Tightness` specification that the Fan rates [Air Extract / Intake] are usually either calculated by a `Professional` so that they comply or are of an adjustable [Air] type which have to be `Commissioned` and Tested to adhere to the specified Air Rates.
This is to prove that the Air Rates are in accordance with `Part F` AND `Part L` and the design of the Building regarding Energy Efficiency.
Also I believe that New Builds have an `Air Tightness` Rating and that this is definitely Tested by closing up the Building and carrying out an `Air Performance Test` - this involves the Building actually being put under a slight pressure from a large Intake Fan - the Air Loss is measured.
IF something like some incorrect Fans were installed there could be excessive Air Loss attributed to those.
I am obviously NOT implying that You have done anything like that.
I don`t think that there is any way out of this requirement for `Part F` Compliance / Certification - unless You can get the Fans Inspected by the Local Authority Building Control - Passed and a Building Regulations Compliance Certificate issued by them ?
They might state that if the Fan Installations were not going to be carried out by a person who was registered with a Ventilation Competent Persons Scheme that the LABC should have been informed via an application for the Works - and the necessary `Fees` paid etc. ?
There will obviously be a way to have the works LABC Certified but it just depends on how awkward [or otherwise] they want to be.
Good Luck in sorting this out shaun.
Regards,
Chris