HISTORICAL OUTLINE OF VENTILATION DEVELOPMENT

Early medieval excavations confirm the use of fire–air heating as early as the 5th century.

When the room was heated through the channels under the floor through the same channels, fresh air flowed in.

Pallady in his first book of architecture informs, that in his time, in the first half of the sixteenth century, Byzantine courtiers, residents of the Region, they brought fresh air into houses through underground channels, from which they used pipes to distribute them to the rooms, by using special doors to regulate and close the channels.

In year 1867 the Russian architect designed an original way of bringing fresh air to the apartment through the gaps in the upper part of the building walls.

There were gaps in the wall of the entire building under the roof, and in order to protect them against atmospheric influences, they were covered with a cornice from above. Until the 18th century, one residential house- and two-story buildings were built mostly of wood. They did not need to have special ventilation devices, because air exchange as a result; the leaks in the walls and windows were even too great, which resulted in the need to apply sealants in the winter to keep the apartment warm. With the development of brick construction, separate ventilation ducts for automatic air exchange in rooms began to be used from the 18th century..