Objective To examine the validity of checklist method for hygienic evaluation of central air conditioning systems(CACS)in public places.
Methods The CACS of 37 public construction projects were selected for hygienic evaluation using self-administered checklist, and then the evaluation results were analyzed with SPSS 19.0.
Results Issues of CACS installation were identified in about one third projects including indirect indoor fresh air inlet, insufficient distance between fresh air inlet and pollution sources, condensate pipes without water seal, and sundries in equipment rooms. Only 16.2% projects were installed air purification and disinfection devices. None of the projects provided windows for cleaning and disinfection. The evaluation results of the same checklist item showed no significant differences among projects of hospitals, commercial buildings, and public traffic constructions(P>0.05); meanwhile, statistical differences were found among various check list items of the same project(P<0.05).
Conclusion Hygienic problems exist in running CACS in public place, and the checklist method can be employed to the hygienic evaluation of CACS.
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