How to calculate tonnage of AC?

http://www.onlineconversion.com/forum/forum_989421674.htm

http://www.comfortair-software.com/

wht is mean by BTUs

BTU = British Thermal Unit

Dear Friend,

Here is the rule of Thumb,

Air Conditioning Calculations - Rule Of Thumb

Calculating the cooling capacity needed for your room is a complicated process as there are many factors to consider. However, there is a simple rule of thumb that you can use to estimate the required cooling capacity for your room. Use this result to compare with the calculation done by the air conditioning contractors for your own checking purposes.

Step 1

Find the volume of your room in cubic feet. This is done by measuring the length, width and height of the room in feet and multiply all the three dimensions together.

Volume = Width X Length X Height (cubic feet)

Step 2

Multiply this volume by 6.

C1 = Volume X 6

Step 3

Estimate the number of people (N) that will usually occupy this room. Each person produces about 500 BTU/hr of heat for normal office-related activity. Multiply this two figures together.

C2 = N x 500 BTU/hr

Step 4

Add C1 and C2 together and you will get a very simplified cooling capacity needed for the room.

Estimated Cooling Capacity needed = C1 + C2 (BTU/hr)

Dear srinivigna

Thanks for this useful information