Hi,I'll be buying two split AC's within the coming weeks. Room 1 size - approx 160 sq feetRoom 2 size - approx 220 sq feetRooms are on the top floor and for both the rooms one wall is exposed to direct sunlight for at least some part of the day. Each has 2 doors and 4 windows. According to my calculation I would need 1.5tonnes & 2 tonnes AC for the two rooms respectively. I would like to know if my calculations are right.My points :- 1. 3 star or 5 star? How much difference will it make? What is the approx break even period between 3 & 5 star if the AC's are used in summers for around 7-8 hours max daily .2. Which brand and which exact model to go for? ( I have a preference for Samsung since majority of electrical appliances in my home are from Samsung & they haven't caused any hassles to me as yet after years of continuous use, but frankly I don't have much idea about the AC brands or models. Suggestions please.).3. Different companies advertize a host of features like dehumidifying, air ionizing etc etc, apart from the standard cooling. Which among these are important and worth paying the extra money?4.What are the typical extra equipments & charges incurred during installation of AC? (stabilizer?are all wires & cables provided for free?). 5. Budget for the AC's are around 65-67K. (excluding installation & all).6. Can anybody brief me about the process of obtaining permission from CESC (power distribution body). Am asking this as our home does not have any points for an AC & I have heard that one needs permission from CESC & deposit a certain amount as security deposit(5000/-?) prior to installing AC's.Suggestions regarding these points will be immensely helpful.