Yes. The area measurement is pivotal in determining the best air conditioner capacity. For smaller rooms, 0.5 to 1-tonne air conditioners do the job. For medium-sized rooms, the capacity should be upped to 1.5 to 2 tonnes. Anything above that should be confirmed after taking the advice of a reputed contractor that understands the sir conditioner installation for large spaces.  One more thing, if the room receives a lot of sunlight, then the air conditioner capacity should be slightly increased. Say, if you require 1 tonne, you can opt for a 1.5 tonnes air conditioner as the harsh sunlight reduces the effectiveness of the air conditioner.