The leaky horror show.

          

Airtightness of concrete basement slabs.

                

Controlled background ventilation for large commercial buildings.

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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