Heat and humidity can certainly bring down productivity in the workplace. You can make conditions more comfortable for work by installing central air conditioners if the work area is large, in which case one small air conditioner would not be enough. So, if you wish to cool the entire house or the office you need to install central air conditioners.

Normally central air conditioners works on the principle of transferring heat from one station to the other with the help of a transporting media which is a refrigerant commonly known as Freon. There are two parts in central air conditioners as it is a split system. One part is the air handler which is placed inside the home and the other part is the condensing unit which is located outdoors.

In order to cool the inside of your home, the central air conditioners remove the heat from the air inside and transfer it to the air outside. The indoor part of the system contains a refrigerant coil across which the indoor air is passed and then it is released outside. This process brings down the temperature inside to the desired level as per the thermostat setting.

Useful hints for buying central air conditioners
You should choose the system that would suit your local climate and the total cooling load. You can either go in for evaporative coolers that are useful in hot and arid regions such as the southwest or you can choose the compressor-driven central air conditioners.

You will also have to work out the size of the system needed.

You should look for a SEER rating higher than 12.0 when you are looking for a central air conditioner.

If you have ducts for an existing forced-air heating system, the central air conditioner system could be linked to these ducts, depending upon their size and the relative heating and cooling loads of your home. You can take the advice of a good HVAC contractor in this regard.

For efficient operation of a central air conditioner, proper sizing and installation are essential. It will be difficult to regulate humidity with too large a unit and if the unit is too small, you might not get adequate cooling on very hot days. Efficiency can come down with improper unit location, lack of duct insulation, improper duct sealing, and incorrect refrigerant charge.

Important aspects which should be considered while buying a central air conditioner are: provision of a fan-only switch, a filter check-light and an automatic-delay fan switch. You should also choose a central air conditioner that does not make too much noise.

If the outdoor (compressor) unit of the central air conditioners needs to be replaced, you should find one, which will be compatible with the existing indoor (blower coil) unit. An old blower coil would not be suitable for a highly efficient outdoor unit.

It is necessary to get an electrician to assess your home's electrical supply such as the voltage and amperage capacity before installing central air conditioners, as it needs a constant 230-volt circuit and 20 to 50 amps of power.