badger, this is clearly nonsense!
(Clause 3.1.2 gives guidance on the application of Part 3. I consider my earlier advice to you that Energy Safety does not consider that applying a mixture of standards to establish compliance with Part 1 of NZS 5261 is best practice for domestic or similar gas installations and does not support such an approach is consistent with NZS 5261.)
since when did you say you where mixing standards??
as i understand it, (and correct me if i am wrong) you have used the British standard to comply with the ONLY mandatory part of the code...part one.
My question to you Badger is, do you believe that your installation complies with the British standard completely?.... then it ALSO complies with part 1 of nzs5261 and you are legally in the RIGHT.full stop. stannard is wrong, and clearly has had a guts full of talking to you.,which is wrong.
You have already proved that your installation is safe by stating that the customer has had no issues with products of combustion entering the house,as we as gas fitters using common sense and experience fully know, a power flue of this type mounted 250mm off the wall expelling products of combustion away from the house will dissipate with air and any air mix that would move back into a open window will be completely safe.FACT !....oh how do i know you ask? its call experience!!!just 20 years with this one product !!and i have installed hundreds of Bosch, rinnai, rheems, palomas.
regards

AND PEOPLE WONDER WHY I GO ON AND ON.... AND USE NAUGHTY WORDS

Badger, as soon as that idiot Banks opened his mouth I thought of what you had related regarding your case. Trouble is that he is very much part of the problem pervading all parts of this , very corrupt ,governance of the country