Error 1018

Highrise Residential occupancies are mandated to have ventilation systems by the code (balanced, exhaust or supply).  These ventilation systems must be input at the Zone level of the Building Tree, Mechanical tab, in the Ventilation box.  Note that the HVAC system itself cannot provide the ventilation, although it could be provided by a Dedicated Outside Air System that feeds to the HVAC.  Each dwelling must be provided with ventilation according to the following formula:

CFM = Floor Area X 0.03 + (NBedrooms + 1) X 7.5  (NBedrooms cannot be less than 1)

You must ensure the ventilation input at the Zone meets this minimum criteria.  Note that the floor areas and bedrooms are input at the Zone level of the Tree, Dwelling Units tab.


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