Selection of an air-conditioning system is generally determined by the sensible heat load of the building, as the total of external and internal loads. 3 systems with a mean specific sensible heat load of 60 w/m² floor area are compared. System 1: VAV-system, representing a turbulent mixed flow ventilation. System 2: Air-water induction system with ceiling induction units, representing a combined turbulent mixed flow - displacement flow ventilation. System 3: Chilled ceiling system combined with displacement ventilation.
This study assessed the effectiveness of permanent but controllable background ventilators in naturally ventilated, office-type buildings with different envelope tightness. It was shown that, during the heating season, it is possible to provide adequate background ventilation for occupant comfort by incorporating commercially-viable, manually-controllable trickle ventilators within each room.
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