Which is the best way to heat a medical center?

i need to find out how can i air-condition in the differents areas in a medical center . I've heard that the best way of heating is radiators with a good boiler. but i need a lot of radiators! is too dangerous central heating systems for an hospital?

and for cooling in summer!? which will be the best choice? a roof top? I think that could be a little dangerous

actually i study architecture and i'm doing the project of Thermodynanics for a medical centreWhich is the best way to heat a medical center?
Hospitals are typically rather large. For Air Conditioning, usually a Central Chiller Plant works best, For heating you would require a central boiler. Sometimes for smaller clinics, you may be able to use smaller HVAC package units. They may have better temperature control over many temperature zones.