- published: 11 Aug 2011
- views: 550078
Air conditioning is the removal of heat from indoor air for thermal comfort.
In another sense, the term can refer to any form of cooling, heating, ventilation, or disinfection that modifies the condition of air. An air conditioner (often referred to as AC or air con) is an appliance, system, or machine designed to change the air temperature and humidity within an area (used for cooling as well as heating depending on the air properties at a given time), typically using a refrigeration cycle but sometimes using evaporation, commonly for comfort cooling in buildings and motor vehicles.
The concept of air conditioning is known to have been applied in Ancient Rome, where aqueduct water was circulated through the walls of certain houses to cool them down. Other techniques in medieval Persia involved the use of cisterns and wind towers to cool buildings during the hot season. Modern air conditioning emerged from advances in chemistry during the 19th century, and the first large-scale electrical air conditioning was invented and used in 1902 by Willis Haviland Carrier.
*Stretch the mildest morning
When I got to be out of bed
Crazy dreams still floating
In the mist around my head
This was meant for you
That was meant for me yeah
This was meant for you
That was meant for me, yeah
Since I met that frown
Saw others think they're fair
For me I prefer those lovin' smiles
And a dozen it must hove been
This was meant for you
That was meant for me, yeah
This was meant for you
That was meant for me, yeah
(* Repeat)