Here is an explanation of the terms you are likely to hear when you shop for an Air Conditioning System:

R.A.C. is the air conditioning industry’s term given to the ‘box’ / ‘window’ / ‘through the wall’ type of air conditioner. R.A.C. stands for Room Air Conditioner, and it was the first mass-produced air conditioner for residential comfort.

‘Split System’ is the name given to any type of air conditioner which has two sections; i.e. and Outside Condensing Unit coupled by insulated refrigeration tubing and electrical wiring to an indoor section; i.e. a High-Wall Console, Ducted Fan Handler, etc.

‘Reverse Cycle’ is the term used to describe the way an air conditioner delivers heating. A special four-way valve reverses the flow of refrigerant within the air conditioning system so that heat is absorbed from the outside air into the refrigeration system and then used to heat the air inside the home / office as it is passed through the air conditioner by the supply fan.

‘Cassette Split System’ refers to a type of indoor section that is fitted into the ceiling, generally in the centre of the room.

‘Non Inverter’ refers to any type of air conditioning system which cycles ‘on’ & ‘off’.

‘Inverter’ refers to the latest type of air conditioning system which operates much like the accelerator (or cruise control) in your car, automatically changing its speed to offset the heat load within the conditioned area. Very high efficiencies are gained because of the varying speed, and the system not constantly stopping and starting.

‘Kilowatts’ of cooling or heating refers to the capacity rating of a system or the amount of cooling / heating capacity required to offset an estimated heat gain or loss of a given area to be conditioned.

‘High Wall Console’ is an indoor section usually located 1800-2000mm from the floor.

‘Multi-Head’ is a type of system, usually Single Phase, Inverter powered, which can have up to seven different types of indoor units connected, each individually controlled and operated in any combination.