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How much space a room air conditioner can cool is dependent on the size of the unit. You can read the amount on the side of the box if you are not sure.
You will need a portable air conditioner that offers 24,000 - 25,500 BTUs to cool a room of about 1500 cubic feet. This is a large sized room and a 2.5 ton unit would cool that area.
0.75 Ton AC is enough for this much area. 1 Ton AC = 12000 BTU, about 6000 btus are required for 12X15 room. hope info will be fruitful
This size unit is enough to cool a room 450 square feet which gets a lot of sunlight; air conditioners are rated by BTUs not degrees of cooling, you run it until the room is the temperature you have chosen.
A 5,000 t0 7,000 BTU should cool it nicely. If there is no insulation, maybe lean toward the 7,000
I currently have a 5k btu air conditioner and I've found that it'll do well to cool a single room, providing the doors are closed most of the time. To expect much more from it as far as cooling wouldn't be realistic. One of the purposes of an air conditioner besides cooling, is to also remove humidity, and if you use it in a larger area, it'll help some, but you can't really expect a lot of cooling from the unit. It'll also run the compressor continually and the electric bill will probably be quite a bit higher.
9000 Btu
Typically the portable models won't be enough to cool an office that size. In particular, if the doors are going to be closed you'd want one smaller unit per room.
Yes, a 4.5 ton air conditioner would be the minimum size for 2000 square feet.
Yes will work on that size house.
Really, it depends on several factors:-The ceiling heightHow well insulated the room isNumber of people occupying the roomPieces of heat generating equipment in the roomThe ambient temperature outsideThe temperature you want to cool the room to
150 square foot