I tried to pursue the credit via calculation because the roject will use the hose bibs on regular basis for the building lifetime, not as a temporary solution. When I asked manufacturers about efficiency of watering by hose, It was not possible for them to answer. Is there a number that is acceptable for reviewers? I used 0.8 for IE coefficient, now I am asked to provide manufacturers documentation. Quite frankly, I think this is "unobtainable".
If I have permanant irrigation system only on a 50% of green surface and the rest has no irrigation, how do I calculate watering demand?
Thanks for any advice...