well for that size room and 5 folks.. we would need a 2 tonner to match the needs atleast.
however i have got 1.5 for the same room size but i stay alone along with that there is no sunlight from anyd direction in that room..
so taking into account 5 people and lots of electronics producing heat.. we need a 2 tonner.. but in 20 k thats almost impossible.
the best ac of all would be the
o'general followed
daikin , hitachi, panasonic, haier
carrier , voltas , lg and so on....