Abstract: The invention can be used for creating an effective ventilation system for building and vehicle interiors in conditions of poor outdoor air quality because of polluted environment and in other cases when it is hard to provide sufficient fresh air supply. The first variant of the claimed system implies that the means of air exhaust from interiors are configured to exhaust predominantly the portions of air exhaled by people or animals indoors. The essence of the second variant of the claimed system is that the exhaust air intakes are placed in the zones of spread or exhaust of the exhaled air stream polluted by respiration products.

Abstract: Use: in building of light, predominantly individual sports and tourist floating craft. Essence of the invention: the display on the surface of the swimming board or surfboard broadcasts the information received both from video cameras located either on the surface of the floating craft or on the supports or pulled in tow under the water, and from external mobile and other devices. The display is configured to stabilize the displayed image and compensate effects caused by water refraction coefficient, and has the ability of creating animated graphic marks and tips to facilitate user's balancing on the floating craft.