Abstract: With the development of society, the amount of daily visitors in general hospitals are increasing, at the same time,new medical technology is emerging, both from medical technology and patient demands proposed new requirements in line with hospital expansion.This article analyzes and discusses the application of air conditioning energy of saving technology in the hospital renovation and expansion project through two examples of HVAC design.

Key words: hospital renovation and expansion, multiuse four pipe heat pump, temperature and humidity independent control system