Dear All,

we’re currently involved in a project of an office building pursuing LEED certification. The majority of building areas will be endowed with natural ventilation, complying with ASHRAE 62.1-2010 requirements. In what relates with simulation for purposes of energy performance calculation we have the following doubts:

  1. how shall we model ventilation in proposed building? We are planning to consider a permanent infiltration of outdoor air corresponding to the minimum outdoor air flowrate according to ASHRAE 62.1-2010 (only during occupied periods);
  2. regarding baseline building, ventilation will be integrated in HVAC system components. Since proposed building is endowed with natural ventilation, we are planning to consider a ventilation effectiveness equal to 1 for baseline building outdoor air calculations.

Do you validate the assumptions above?