What you need to know about air conditioners ....... Choosing the best air conditioner can be a challenge. What size do you need? How much will it cost to run and how noisy will it be? We'll help you find the right model for your home. Types of system – split-systems, reverse-cycle and more Choosing the right capacity (size) Running costs and how to save money Noise Features worth having Other things to consider: when to buy, installation and more. This guide focuses on split-systems, as these are the most popular type of air conditioner in India. Types of air conditioner Split-system: These have two parts: an outdoor compressor unit and an indoor unit connected by pipes. They're usually used to cool one or more rooms, or an open-plan area, of up to 60 square metres. Price range: rs 22000 to 45000 Multi-split: A type of split-system, with one outdoor unit connected to two or more indoor units. This can be a good way to cool or heat two or three rooms that are reasonably close together, when separate split-systems or a ducted system aren't possible due to space limitations. Ducted: The best option for temperature control throughout a large home, this consists of a central unit connected by ducts to air outlets and sensors in each room, with a control panel to set the target temperatures and the zones of the house to cool or heat. See our separate ducted air conditioner buying guidefor more details. Price range: 75000+ Wall/window: These models are usually installed in a window or external wall, and can cool rooms and open-plan areas of up to 50 square metres. Smaller units can be plugged into a normal power point; larger ones may require additional wiring. We don't currently include these models in our reviews, because there are fewer on the market now, as split-systems are more efficient and have become more affordable in recent years. Price range: rs20000 + Inverter or non-inverter? Having decided on the general type, you also need to think about whether to go for an inverter model, and whether you want both cooling and heating, or cooling only.