Hi everybody,

I am working in an office building project, core and Shell scope. It has 2 spaces, one whit natural ventilation class 1 (Lobby) and other class 2 (Parking garage) with no roof top in a 40 % of their area. The question is if is possible share the air between this 2 classes of air take into account that in the ASHRAE 62.1 of 2010 I found it that in the section 5.16.3.2.5 “class 2 air shall be recirculated or transferred to class 1 space” and no specify over a specific conditions or uses.

I compare with the standard ASHRAE 62.1 of 2007 in the section 5.17.3.2 say that “class 2 air no shall be recirculated or transferred to class 1 space”. However if I use the ASHRAE 62.1 of 2010, could be an exception this case for have not roof top in a 40 % of the parking area?

Thanks in advance