A spot cooler is a portable air conditioning unit designed to add additional cooling or for temporary use in a location where there is no existing air conditioning.

1. Spot Cooler
A spot cooler is a portable air conditioning unit designed to add
additional cooling or for temporary use in a location where there is no
existing air conditioning. Examples of locations where a spot cooler
may be used include offices, aircraft while on the ground, computer
rooms, server rooms, and tents or other temporary facilities.
As a portable air conditioning unit, the operation of a spot cooler is
similar to a window air conditioner, it pulls air into a condenser, cools
it, and circulates it back into the room. However the unit is typically
on wheels and in a self contained cabinet making for ease of
portability. Like any air conditioning unit, a spot coolers performance
capabilities are measured in British Thermal Units (BTU). Most spot
coolers range from 12,000 BTU to 100,000 BTU although some large
commercial units can go up to 1,000,000 BTU or more. Note that
12,000 BTU is also known as 1 Ton of cooling capacity.
A spot cooler cools and dehumidifies a room or area of a building
where either no air conditioning exists or additional air conditioning is
required. Some large industrial buildings have areas where no air
conditioning exists or central air conditioning units fail. A spot cooler
can provide localized or temporary cooling. Rooms with large amounts
of electronic equipment such as server rooms, computer rooms, and
media rooms generate excessive heat. A spot cooler can solve this
problem as well.
Many hospitals, as well as other businesses,elect to use a spot cooler
for emergency purposes.

2. A spot cooler may also be used to cool a home. In homes with no
central air conditioning, usually cooler climates, an owner or tenant
may choose to use a spot cooler. Although a spot cooler may cost more
than a window unit it may provide greater flexibility, efficiency and
less effort to install and use.