Portable air conditioners

A portable air conditioner can be easily transported inside a home or office. They are currently available with capacities of about 5,000–60,000 BTU/h (1,800–18,000 W output) and with or without electric-resistance heaters. Portable air conditioners are either evaporative or refrigerative.

The portable air conditioner consists of a mobile self contained air conditioning unit that is placed on the floor inside a room and discharges exhaust heat using a hose vent through an exterior wall. Portable air conditioning units are a bit noisier than other types of units and can typically cool rooms under 500 SF. These units are a solution to those stubborn hot rooms that may exist even with central air conditioning. Like the window air conditioner, the portable unitary system has all the refrigeration components on one compact box. It also ejects heat out one end and blow cooled air out the other end.

A portable split system has an indoor unit on wheels connected to an outdoor unit via flexible pipes, similar to a permanently fixed installed unit. The split system or ductless system is technically called a "packaged terminal air conditioner" or PTAC. You see these occasionally in home applications but more commonly in hotels, motels and apartments. The split system breaks the air conditioning system into two packages or terminal units and refrigerant tubing passes through the wall connecting both package units.

One terminal package is the condensing unit located on the exterior and includes the compressor, condenser and condenser fan. The other terminal package is the evaporative unit located on the interior and handles air cooling and distribution. The internal evaporative unit includes the fan, expansion valve and evaporator coil.

Portable hose system is vented to the outside via air ducts. The monoblock type collects the water in a bucket or tray and stops when full. A single-hose unit uses air from within the room to cool its condenser, and then vents it outside. This air is replaced by hot air from outside or other rooms (due to the negative pressure inside the room), thus reducing the unit's effectiveness. A dual-hose unit draws air to cool its condenser from outside instead of from inside the room, and thus is more effective than most single-hose units.

In case the unit has a problem a technician will come when called and first carry out a diagnosis to determine the problem and he will then provide you with the quotation of how much the job will cost. He will start by checking the pressure of the system and if it is too high then one of the valves could be jammed or the system could be clogged thus using more energy when trying to operate. Then if it is too low it could indicate leaking of either air or refrigerant. This can be fixed by sealing the holes or by replacing pipes and valves. The refrigerant leaks can only be detected using a special dye that can be seen using a backlight. This is because refrigerant evaporates when exposed and it leaves no trace. He will then recharge the system with the appropriate amount of refrigerant according to the manufacturer’s requirements.