We install and service commercial and residential air conditioners. The most popular residential air conditioner choice is usually a high wall split air conditioner or portable air conditioner.
The following types of air conditioners are popular choices for commercial and industrial use: Cassette; Ducted Split; Under-Ceiling; Floor Standing; Rooftop Package Units; Window Wall and Air Curtains.
For an accurate assessment of the correct size of air conditioner required, we would need to do an on-site inspection as there are a number of different factors to consider. The following information will however give you an approximate guide to the air conditioning capacity required for a particular area.
18 m2
24 m2
36 m2
48 m2
60 m2
9000 BTU
12000 BTU
18000 BTU
24000 BTU
30000 BTU
Before air conditioning or refrigeration was invented, cooling was done by saving big blocks of ice. When cooling machines were first used, they rated their capacity by the equivalent amount of ice melted in a day. This is where the term “ton” comes from when sizing air conditioning.
A ton of cooling is now defined as delivering 12,000 BTU/hour of cooling. BTU is short for British Thermal Unit (and is a unit that the British do not use).
The first functional definition of air-conditioning was created in 1908 and is credited to G. B. Wilson. It is the definition that Willis Carrier, the “father of air conditioning” subscribed to:
The work of your home air conditioner is to move heat from inside your home to the outside, thereby cooling you and your home. Air conditioners blow cool air into your home by pulling the heat out of that air. The air is cooled by blowing it over a set of cold pipes called an evaporator coil. This works just like the cooling that happens when water evaporates from your skin.
The evaporator coil is filled with a special liquid called a refrigerant, which changes from a liquid to a gas as it absorbs heat from the air. The refrigerant is pumped outside the house to another coil where it gives up its heat and changes back into a liquid. This outside coil is called the condenser because the refrigerant is condensing from a gas back to a fluid just like moisture on a cold window.
A pump, called a compressor, is used to move the refrigerant between the two coils and to change the pressure of the refrigerant so that the entire refrigerant evaporates or condenses in the appropriate coils. The energy to do all of this is used by the motor that runs the compressor.
The entire system will normally give about three times the cooling energy that the compressor uses. This odd fact happens because the changing of refrigerant from a liquid to a gas and back again lets the system move much more energy than the compressor uses.
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