| 摘要 |
A ventilation apparatus provides an intermediate space between a building window and the outside the building and provides means for controlling air flow to or from the intermediate space to or from the a building window and the outside of the building. The apparatus can be used in three modes: in one mode for heating air in the interior of the building structure by a circulating flow of air from inside the building, through the intermediate space where it is warmed by captured solar energy, and back into the building interior; in another mode for cooling the interior of the building structure by conveying warm interior air through the intermediate space to outside the building; and in another mode for allowing free two-way ventilation between the interior of the building structure, through the intermediate space, and to and from the outside air.
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