karaventtiilit

Karaventtiilit are a type of ventilation device commonly used in Helsinki's oil-fired heating systems. They were widely used to distribute warm air through buildings, particularly in apartments and residential areas. The karaventtiilit were typically installed in the wall of a room, near the ceiling, and consisted of a fan that blew warm air into the space through a network of pipes.

The karaventtiilit were designed to work in conjunction with oil-fired central heating systems, which were popular in Helsinki during the mid-20th century. The systems would heat water, which was then pumped through radiators to warm the space. The karaventtiilit would then blow the warmed air through the pipes, distributing the heat more efficiently throughout the building.

Karaventtiilit were also equipped with a damper, which allowed the user to control the amount of air that was blown into the space. This feature was particularly useful for adjusting the heat levels to suit the needs of the occupants.

Over time, karaventtiilit have largely been replaced by more modern and energy-efficient heating systems. However, many older buildings in Helsinki still retain these devices, and they continue to play a role in the city's architectural heritage. Despite their eventual replacement, karaventtiilit remain an interesting aspect of Helsinki's history of heating and ventilation.