From playing with it, they learn some basic principles about fire, about intake, about combustion, about exhaust.

Number 13 was the test of the V12, plus exhaust and cooling system.

The exhaust pressure is controlled by a regulating valve to suit the needs of the process steam pressure.

That metal acts as a micro louver, so from the exterior of the building the sun sees it as totally opaque, but from the interior it's entirely transparent.

It is provided with its own powerhouse containing large diesel driven generators, air conditioning equipment, and cooling towers required to cool the thousands of vacuum tubes in the computer.

There was a device to circulate air that worked day and night and the sound of its engine is more deafening than that of an army tank.

We spend an extraordinary amount of time in buildings that are extremely controlled environments, like this building here environments that have mechanical ventilation systems that include filtering, heating and air conditioning.

The use of fuelwood for household cooking and heating can also cause health hazards and respiratory illness, especially in small spaces without proper ventilation.

(a) Relaxation study of the interaction between the exhaust products of turbojet engines and the upper strata of the Earth's atmosphere by examining the images and spectra obtained in the ultraviolet range.