通过让暖空气逃脱高，同时从下面带入凉爽的空气，您可以在没有空调的情况下冷却您的房子。

As most people know, all else being equal, warm air rises. This is good news if you are interested in passive ventilation. Cross-ventilation with windows on opposing walls, catching the prevailing winds, is a good way to bring in fresh air when weather permits.通风的另一种好方法是利用“stack effect.”The cupola pictured has two electrically controlled awning windows, placed to catch the prevailing winds, and two fixed windows to keep the cost down. An open shaft leads to the two-bedroom guest suite below, bringing in natural light. When rain hits sensors mounted on the sills, the windows automatically close. Normally I am not a fan of gadgets, and I believe that one goal of green building should be toreduce electricity usage.雨传感器的小奢侈似乎有价值，即使它并不完全被动。

自然光线杯子带来了取决于窗户的尺寸和轴的宽度和高度。在4英尺正方形的圆顶上图中，在白色涂布的轴上进行了足够的光，以消除下面走廊中的白天照明的需要。点亮或通风更大的空间，考虑将圆顶沿脊延伸到称为“监视器”屋顶的形式（顶部这一页示出了监视器屋顶的示例）。

What about warm air rising in the winter,when you want it down in the living space? Won’t the stack effect pull heated air up into the shaft, where it will leak out the windows? It shouldn’t. In an well-insulated, air-sealed house, temperature stratification is minimal. There should not be more than a few degrees’ difference between the floor and the peak of the roof. Even in a tight house,对流环may be created in a vaulted-ceiling great room, where a lot of air is in contact with a lot of surface area, which is in turn in contact with the cold outdoors. Warm air rises, cools, and then falls to the floor, which is felt as a draft. In a cupola shaft, however, there is comparatively little air and surface area compared to the amount of floor area, so convection loops are not as noticeable.

注意绝缘和空气密封，though. Because they are not common, and some unusual framing is involved, it is difficult to insulate a cupola to the same level as conventional walls and roofs. As with any framing-intensive area, it’s a good idea to wrap either the inside or the outside of the beams that support the cupola with rigid foam to eliminatethermal bridging.

圆屋拉也不是吝啬窗户质量的地方，即使很难看到高度冬季舒适度，以及你的能源账单。

A few more tips:

让圆顶杯足够大。一个经验法则是使圆顶1/10至1/8镶嵌的山脊的长度。这可能似乎太大了，但似乎在地面上的超大似乎在屋顶上看起来很小。虽然不要过度呢：在屋顶的1/6或1/5的尺寸上，圆顶杯看起来就像它不能在它下面的房子支持。

Matching proportions from the house is another way to design a good-looking cupola. If the house has horizontal proportions, use similar proportions on the cupola. A house with a hipped roof will look good with a similar roof on the圆杯子。不要忘记风向标。