The American
inventor W.H. Carrier developed the first air-conditioning unit in 1902.
Since then, the (1)_____popularity_________ of air-conditioners has increased
(2)____rapidly________. Given people's (3)_______ability______ to function in the
heat, air-conditioners provide them with a feeling of comfort. That is
why the (4)_____likeliness________ of even more people installing air-conditioners
for (5)______personal_____ use in the (6)______privacy_______ of their own home will
increase further.
But what do they do? Their aim is to
(7)_____stabilise______ the temperature in a room. This is accomplished by the
(8)______presence______ of a fan, which also removes dust and odours from the
air and controls the humidity. The (9)____efficiency____ of air-conditioner
depends on the power of its fan. Nowadays there is a great
(10)______variety_______ of air-conditioners on the market which are bound to
cover each person's needs