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Our Temporary Air Conditioning units require little more than pluging in and switching on, but if you want to know a bit more, then please read on.

When people feel uncomfortably hot there is a marked decline in their ability to work productively and equipment is also adversely affected.

Temporary air conditioning will maintain a comfortable working temperature for staff resulting in a corresponding increase in their performance.

The best working temperature for desk-bound office personnel is around 20-22 degrees Celsius.

An industrial worker performs best at around 18 degrees Celsius. At 24 degrees productivity falls by around 10%.

A comfortable environment depends upon several factors. These include temperature, humidity and air movement, all of which can be improved by using temporary air conditioning.

The average office worker generates about 500 BTU's or about 150 watts. An average computer generates about 850 BTU's or 250 watts

The increased use of electrical equipment and better insulation plus our ever changing climate account for the need of temporary air conditioning in the work place.

The human body relies on perspiration for cooling. The rate of perspiration depends on the humidity level. In a humid atmosphere evaporation is slow, this reduces the bodies natural cooling effect.

As temporary air conditioning reduces humidity and creats air movement your body is better able to cool itself.

Temporary air conditioning typically reduces the air temperature entering / leaving the machine by around 10 to 14 degrees Celsius and at the same time reduces humidity.

Temporary air conditioning and fridges or freezers all use the same basic principles to achieve a cooling effect which is removing heat.

To better understand temporary air conditioning you need to understand that heat is a form of energy.

The amount of heat energy in an object determings whether it is a solid, liquid or gas.

For example, water at room temperature is liquid, but when heated it becomes a gas ie-steam.

Cooling the steam returns it to a liquid state.

By returning the gas to a liquid it has to regain its heat energy, it does this by taking in heat from its surroundings,which in a temporary air conditioning unit is the air in your home or work place.

Basic refrigeration system:

Temporary Air Conditioning units consist of a sealed system containing refrigerant gas.
Throughout the system there are changes of heat and pressure.

Starting at the compressor

Low pressure vapour refrigerant is compressed and discharged out of the compressor.

The refrigerant is now a high pressure, high temperature, vapour.

The high pressure refrigerant now flows to the condenser coil.

Air flowing across the condenser discharges heat and changes the high pressure refrigerant from a high temperature vapour to a low temperature liquid.

The high pressure refrigerant then flows through a thin pipe called a capilliary which meters the correct amount of liquid refrigerant into the evaporator.

As the refrigerant passes through the capilliary the high pressure liquid changes to a low pressure, low temperature, saturated vapour.

This saturated vapour enters the evaporator coil.

Air flowing across the evaporator gives up heat from the room air and changes the saturated vapour to a low pressure dry vapour.

The low pressure dry vapour is then returned to the compressor and the cycle starts again.

Our temporary air conditioning comes in two basic types based on how the hot air is disposed of.

Monoblocs:

This is a one piece temporary air conditioning unit with an exhaust hose.

Warm air from the room enters the Air Conditioning unit and is chilled before being returned into the room.

Air also passes over the condenser to absorb the captured heat and is expelled outside the room via a hose which is between 3" and 10" in diameter.

Split units:

These temporary air conditioning units have a condenser that is remote from the indoor unit and connected via an umbilical cord containing flexible refrigerant pipes.

Room air is drawn into the temporary air conditioning unit and cooled before being blown back into the room.

The condenser is sited outside the room to be cooled and uses external air to dispose of the heat.

These split units are more efficient than monoblocks as none of the cooled room air is used to cool the condenser.

The umbilical cord linking the two parts of the unit is much narrower than the hose of a monobloc, around 2" x 1".

As the condenser is seperate these units are not quite as versatile as a monobloc.