you should get data on the heat dissipation of the equipment, how often it runs, and do a normal load calculation.
There may or may not be a rule of thumb on ton/ft.. but that really can be wrong. I could imagine a high elevation elevator in high use buildings needs more cooling than a 2 story building elevator that has very efficient motors etc.
i have 5-units of 35kw motor its high rise elevator. assume that its efficiency is 85% and its use factor is 95%. what formular for heat dissipation can i use?
Rather than using a thumb rule, I guess it is quicker and safer to do a load calculation. All you need is to factor in the fabric load and the Motor Load. Fresh Air would be Zero. No Occupancy and minimal lighting.