Hot-sphere anemometers are widely used for measurement of air velocity in the occupied zone. In this paper, the ability of hot-sphere anemometers to measure transient flow in a double-skin facade is investigated. When hot-spheres are used in a double-skin facade, the conditions are very different from the measurement of air velocity in the occupied zone. The velocity is higher and the flow is more transient, the anemometer is subjected to high loads of direct solar radiation and wide temperature ranges and, finally, the direction of the flow is important. The flow in the double-skin facade is highly transient and therefore, the dynamic properties of the hot-sphere anemometer must be investigated. An experimental setup to measure the dynamic property using a jet-wind tunnel and a device for moving the anemometer is described. The experimental setup allows examination of the standard deviation measured by the anemometer. Temperature compensation is the working principle of anemometers. The ability to compensate for different temperatures when exposed to solar radiation is investigated in a controlled environment using a powerful lamp as a radiant heat source. In the double-skin facade, both upward and downward flow will occur and therefore, it is important to determine the direction of the flow. A simple method using two hot-sphere anemometers separated by a small plate is discussed.