there has always been air conditioning, just not in the condition i want it.
boner
Air conditioning techniques were used in Ancient Egypt, Ancient Rome, and medieval Persia. Mechanical cooling has been around since the 2nd century.The first modern electrical air conditioning unit was invented in 1902 by Willis Carrier.Air conditioning was invented in 1783
When the school districts decided to have them installed. Heating systems in schools, even if just in the form of a wood stove, have been around essentially as long as schools themselves have; air conditioning is a relatively recent development.
The concept of air conditioning has been in use since the time of the Ancient Egyptians. The first modern electric air conditioning device was invented in 1902 by Willis Carrier.
A long time ago
It is estimated that there are around 600,000,000 vehicles that travel the roads so I would conservatively say that 80 percent have air conditioning............
15 yrs
None that I know of and I have been in the biz 25 years, and I have been around many leaks large and small.
The phrase meaning "cool air circulated around a room" is spelt air conditioning.
drf air conditioning
The best way to clean air conditioning ducts or vents, is with a feather duster. If you don't have a long enough one, you can tie it to your broom handle,or use a broom.