Background: Hospitals as major energy consumers can manage their energy consumption by intelligent interventions. Therefore, this study aimed to determine the amount of energy consumption of Water, Electricity, and Gas, and their association with functional indicators in teaching hospitals of Shiraz University of Medical Sciences from 2009 to 2011.

Methods: The present study was descriptive and cross-sectional in design which analyzed energy consumption and functional indicators from the beginning of 2009 to the end of 2011. The sample consisted of 7 teaching hospitals affiliated to Shiraz University of Medical Sciences. Data were collected from the departments of consumption pattern reform and statistics and recorded in the data collection form  developed by the researcher. Data were entered in SPSS₁₆ and analyzed using descriptive and analytical tests such as Pearson correlation test.

Results: The average consumption of water, electricity, and gas per occupied bed days were 0.09 m³, 2.78 kWh, and 1.56 m³, respectively. Also, statistically significant and positive relationships were found between the amount of water consumption and the number of active beds (P = 0.009) and occupied bed days (P = 0.007).

Conclusion: Energy consumption in teaching hospitals of Shiraz is lower than similar domestic studies and in some cases more than foreign studies. More active beds with lower productivity increase energy consumption. Hospitals can reduce energy consumption and their costs with more efficient use of resources.