Hello,

I have a question regarding ASHRAE 90.1 Appendix G HVAC systems for a
residential building. It is a 38 story residential building with about
50,000 SF of floor area that is not residential units comprised of
corridors, amenity spaces, mechanical rooms, storage rooms, etc. I will be
using system 2 PTHP for the residential spaces. Should I be using system
7/8 for the rest of the building since the building is 38 floors?

Thank you

*Mike Campbell E.I.T., LEED AP O+M