| 摘要 |
<p>The invention provides systems and methods for heating and cooling fresh air entering a building with stale air exhausted from the building. Fresh air is passed between and orthogonally over some of a plurality of corrugated metal sheets (32). The corrugations (32) comprise alternating half circles, each having a radius (R). The sheets (32) are separated from each other such that the distance between midpoints of the facing half circles is in the range from between R/2 to R. Simultaneously, stale air is passed between others of the plurality of corrugated metal sheets (32).</p> |
