Estimate horse power of Air con system.

Dear all, I am a newbie. My work now require calculate (more exactly is estimate) power of air-con system for my future factory. I only know square S1 of office, square S2 of high bay area, square S3 of low bay area, square S4 of clean room. How do I do to estimate power of air-con system?

Perhaps it would be useful to contact your preferred supplier of the aircon equipment and get them to provide a quotation for the supply of it.

They will then do the calculations.