It is as simple as it seems. Airflow through a building can be good for many reasons. One of the largest benefits to a building is what we call air change effectiveness. This refers to how long the air contained in a room takes to be replaced with fresh air. We all enjoy this, and the effects are important for the comfort of the building occupants.

The easiest way to do this is to have and to use windows on opposite sides of the room. This is a lot more effective than that of window on one side of the room. However, they don’t have to be the same size on either side, there just has to be n opening for one side to draw air through from the other.

Night purging is also a very effective way of cooling a building. This occurs when at light, high windows, sometimes roof windows where possible, are opened in the cooler hours of the night to allow all the hot air to escape. Generally this is good in warmer climates, and is particularly useful during a heat wave also.

Ceiling fans, so simple, so effective. In summer the effect of a breeze over our skin can give us the sense that we’re about 2 degrees cooler. In winter, the blow the warmth provided by a heater back down from where it accumulates on the ceiling and allows better efficiency.