Can be a fairly difficult task in choosing the best portable air conditioner for your office & home, if you don't know what you're looking for. actually that there are two general types of air conditioners available, one air conditioner has a couple different styles available, it's make difficult in choosing one of them before you start shopping around, you have to understand them, Each style has its pros and cons. generally the cheapest is in portable air conditioning is the evaporating cooler.
Basically air conditioner operates on the principal of pushing hot air through a water-logged medium which will cause reduce the ambient air temperature and evaporation. Although these units require no ventilation, but they incorporate a basin of water that needs to be recharged regularly. This can lead to stuffy if you forget to clean. Ac is very good to use in dry areas, and areas that have high humidity.Cooler that uses evaporation of refrigerant is the second choice. Ventilation is not required in this unit, because they use the exhaust tube to move the hot air outside the areas that need to be cooled. Dual-hose unit using a second exhaust tube, and intake tube, while the unit sprayed using only single-exhaust tube.
One reason to use the intake tube on a dual-spray unit is to develop evenly distribute the air pressure or draw additional air from outside. Pressure difference that allows the hot air from higher pressure areas should be drawn to the area being cooled is probably due to single-hosed units. Air hose is usually best used in small rooms, but if you pick the big room, you can use a dual-hose unit.