Post by bob Post by Sheldon Martin Post by Bruce 3 Post by Bruce 2 Post by Cindy Hamilton
Manufacturers generally recommend that you don't run your domestic
air-conditioning unit below 65 F. At 65 F, my thermostat would be calling
for air-conditioning, because waste heat from appliances and bodies
would keep the house too warm. Manual control is preferable for me.
People who always have their airco on, are contributing to the
destruction of the planet. They're lazy, entitled and selfish.
Or have a health condition that precludes them from breathing
Yes, but that would be an extremely small percentage.
I've never even heard of "I can't breathe un-conditioned air".
For a troll you possess a significantly low IQ.
Hospitals keep their A/C on continuously, as do many others.
Actually the main job of air conditioning is to filter the air of
particulates, next is dehumidifying or humidifying, last is cooling.
Too many forget to change the A/C's filter, usually they're just too
cheap... little do the cheapskates realize that a dirty/clogged
filter makes the A/C work harder, increasing their electric bill.
The main reason hospitals run the temp low is to help prevent growth of
bacteria. Everything else you mention is secondary.
Humidity control. Many years ago my father was the maintenance engineer
at a printing plant. They would often run the AC in cool damp weather
and at the same run the boilers to keep the temperature up. They were
not concerned about comfort, just keeping the paper going through the
Yup, when Willis Carrier invented the very first modern mechanical air conditioning system in 1902, it was
put in a Brooklyn newspaper printing plant for humidity control, high humidity would lead to ink
bleeding, thus ruining the paper run... in 1906, Carrier patented that initial device, called “An Apparatus for
Then it was used in other industrial applications, e.g. textile mills, pharmaceuticals, confectionary
manufacturing, explosives - humidity control is critical in these manufacturing processes to get good
First "consumer" use was in 1917, movie theaters in Alabama and Chicago installed A/C, and it spread quickly
to theaters... Then in 1924 JL Hudson Department Store in Detroit had A/C... then office buildings (Chrysler
Building in NYC...), by the early 30's passenger rail cars, by the early 40's buses, etc... Packard cars in
1940 could be ordered with A/C...
"...The Buffalo Forge Co. who excelled in manufacturing heaters, blowers, and air exhaust gave
Carrier the job title of heating engineer in the newly created experimental science department of
their company. The first task they assigned him was to deal with a problem at a Brooklyn printing
plant. Only 25 at the time the very bright young man quickly identified the source of the problem
which stemmed from fluctuations in heat and humidity. This variation caused the paper to expand
and contract just enough to ensure the misalignment of the colored ink. He determined what the
proper moisture level for printing was by using the national weather tables to calculate the precise
temperature which would maintain the appropriate humidity level.
In 1902 he designed his spray driven air conditioning system which controlled both temperature
and humidity using a nozzle originally designed to spray insecticide. He built his "Apparatus for
Treating Air" (U.S. Pat. #808897) which was patented in 1906 and using chilled coils which not
only controlled heat but could lower the humidity to as low as 55%. The device was even able to
adjust the humidity level to a desired setting creating what would become the framework for
the modern air conditioner. By adjusting the air movement and temperature level to the refrigeration
coils he was able to determine the size and capacity of the unit to match the need of his customers.
While Carrier was not the first to design a system like this his was much more stable, successful
and safer that other versions and took air conditioning out of the dark ages and into the realm of science..."