Influence of natural ventilation on selection of ventilation equipment

Aiming at the existed problems of higher investment and running costs in some projects resulting from not considering the influence of natural ventilation on selection of ventilation equipments, introduces a new method of wind pressure calculation by developing an analytic building model. Deduces theoretically the natural ventilation calculation under the action of thermal pressure and wind pressure individually and simultaneously. With an actual project, concludes that the ventilation equipment can be smaller in capability when considering the effect of natural ventilation, consequently energy consumed being less.