FIELD: civil engineering, applicable for installation in a window opening on the upper surface of the window frame. SUBSTANCE: the ventilation antinoise device has a hollow body with holes in the outer and inner walls. A layer of heat-insulating material fastened on a reinforcing partition adjoins the outer wall. The body cavity houses valves for shutting off the ventilation openings in the layer of heat-insulating material. The body may be made of plastic material, and the reinforcing partition- of glass-reinforced plastic. EFFECT: enhanced reliability of sealing. 12 cl, 3 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| VENTILATION NOISE-SUPPRESSING DEVICE | 2000 |
|
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| TRANSOM AUTONOMOUS VENTILATION APPARATUS | 2021 |
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RU2779702C1 |
