Abstract: A ventilation device for ventilation of a building having a double-window construction with an air space. The device communicates with the open air space and has four throttles. The first and the second throttles can selectively cut off the passage of air from the air space into a first and a second chamber, respectively, of the device. The third throttle can selectively cut off the passage of air from the first chamber and into the building. The fourth throttle can selectively cut off the passage of air between the open air space and the first and the second chamber. Temperature-sensitive actuators can activate the throttles, selectively adjusting air flow.

Abstract: The present invention relates to a ventilation device for ventilation of a building with a double-window construction with an air space, wherein the device communicates with the air space and has at least a first throttle, a second throttle, a third throttle, ad a fourth throttle, wherein the first and the second throttles are able to selectively cut off the passage of air from the air space and into a first and a second chamber, respectively, of the device; wherein the third throttle is able to selectively cut off the passage of air from the first chamber and into the building; and wherein the fourth throttle is able to selectively cut off the passage of air between the open and the first and the second chamber; temperature-sensitive actuators for actuation of the throttles, whereby the air from the space will, in case of increasing temperature within a first low range of temperatures of the air in the air space, to an increasing extent be conveyed into the device via the first and the second throttle and on