Look at the second storey

[Untaught88]

Hi,



Look at the second storey in this image, please. There is a window and two XXX on the right side of the window and two on the left side. Are they called "ventilators"?

 

[SoothingDave]

Fans?

 

[Tarheel]

They are fans, which provide ventilation. (They hardly seem necessary.)

 

[Untaught88]

These are common in Pakistani houses. If there are no fans but those "holes" and a window or something else like that to cross the air. What would you call it?

 

[Tarheel]

I do not know what "cross the air" means. I also don't know what you are referring to. That huge hole in the wall?

:-?

 

[emsr2d2]

Having a couple of windows open provides a "through draft" or a "cross draft" but since there doesn't appear to be any glass in the main "windowframe", I can't see why those 4 ventilator fans would be needed.

 

[tedmc]

For better efficiency, ventilator fans are normally installed on the openings through the walls and not on the windows. Windows are not meant for that purpose, they are meant for natural ventilation. The proper placement of windows on the opposite walls of a room allows for through/cross ventilation which is desirable for buildings in warm climates.

not a teacher

 

[MikeNewYork]

Because the fans are near the top of the house, if they are put on exhaust, they could help. Heat rises. A similar principle would be use of an attic fan.

 

[tedmc]

Because the fans are near the top of the house, if they are put on exhaust, they could help. Heat rises. A similar principle would be use of an attic fan.

OK, this is not a discussion about English but about ventilation.
The position or height of mechanical fans or ventilators is immaterial as they work on the principle of suction. The fans turn to draw air out of a room creating a negative pressure which causes fresh air to move in through other openings.
The positions matter only with wind-induced ventilators which rely on the natural, upward movement of warm air (air current or draught) where the openings and ventilators are preferred to be located at the highest levels.

not a teacher

 

[Tdol]

They look like clumsily fitted air-con to me.