Hello we´ve submitted a project to review in which we have no conditioned spaces in the proposed case but we modelled the HVAC system the same way in baseline and proposed cases since we dont comply with the criteria for non-conditioned spaces these is the review comment we got:

1. It appears from the narrative provided under PIf4 (Schedules and Overview documents) that no HVAC systems except for ventilation fans are provided for the project building and therefore the building spaces meeting the criteria for un-conditioned space.

As per the ASHRAE 90.1-2007 Users Manual, unconditioned space is not cooled and has a heating system smaller than 3.4 Btu/h#sq.ft. Note that for unconditioned spaces, the envelop does not necessarily need to be modeled, but the electric loads from the lighting and fans shall be included in the energy calculations per LEED Interpretation 2028 dated 1/29/2008.

I don´t know if they´re telling us not to model any HVAC systems or that we have to install one if we dont comply with the criteria.