1. Measure the area of the room and convert that figure into BTU's. The area of the room is determined by multiplying the length and width. The measurement must be in meters, (1 foot
http://www.ehow.com/how_4965390_calculatehvacton...

hp or power is torque/time (rotating motor) 3000# can be lifted 10' in a minute with 1Hp. 30,000# can be lifted 1' in a minute with 1Hp. 1000 tons can be lifted 1' in an hour with
http://wiki.answers.com/Q/How_calculate_the_motor_...

There is a regular FORMULA for computing tonnage. you won't find it here on Answers but you can try looking in BOWDITCH or do you mean Tonnage in AIR CONDITIONING? This is BOATS AND
http://answers.yahoo.com/question/index?qid=201201...

this refers to a software package you have to order and buy
http://www.askmehelpdesk.com/engineering/aircondi...
