Background: Maintenance is a core function of biomedical engineering and is essential for the optimum functioning of equipment. This study was undertaken with the objective to determine whether the current maintenance practices are effective in reducing equipment breakdown and increasing the life of critical equipments such as ventilators. Methodology: All the ventilators installed by a single firm at AIIMS were studied. A total of 179 ventilators supplied and installed in various inpatient areas across the hospital were studied. It was a retrospective descriptive study. Equipment related data was abstracted from the various service reports collected and compiled from the vendor and the nursing counters.