As the price of home energy usage will continue to sky rocket along with worries about green house gas emissions, choosing the proper air conditioner (best portable ac available in india (look at these guys)) requires careful consideration of components aside from cooling comfort.
Air conditioners come in various types, each of that has its own disadvantages and advantages.

Ducted

A ducted AC system is one that provides cooling to multiple rooms by way of a a number of ducts which are usually running on the roof of the home of yours. This's an even more complicated system that requires the installation of a pro and is costlier compared to some other types of systems.

Evaporative
An evaporative cooling system operates by drawing air which is heated from the outdoors and turning it into air that is cool inside your home. This is less expensive and more energy efficient compared to a ducted AC system and calls for just the services of a qualified contractor for its installation. This is most effective in areas with humidity which is very low.

Refrigerated

A refrigerated air conditioner uses the evaporation of a refrigerant liquid to offer cooling. It's the widespread choice of many households because it functions well in extremely hot weather and also lowers humidity within homes.