| 摘要 |
The invention relates to a ventilation device for inner rooms of buildings with air preheating. Such a ventilation device contains a fresh-air lock (4) which towards the outside of the building has an inlet opening (louvred grating 11) and towards the inside of the room an outlet opening which is covered by a cover plate (9) provided with air-outlet openings (10). According to the invention, an electric surface-heating element is to be used for the air preheating, which element lies parallel to the cover plate, preferably lies flat on the cover plate and is connected thereto. Expediently, a foil-heating system known per se is used, which is stuck onto the cover plate from the inside. With this arrangement, in particular the retrofitting of air preheating to standard ventilators with a removable cover plate is possible in a simple and time-saving manner. <IMAGE> |
