Good morning, I would like to have a quote for the next: - Air conditioning, ventilation system and hot air curtain (e.g. sight and sound inspection, checking and vacuuming of filters or perforated metal plates of the indoor units if necessary, review settings). - Check HVAC equipment (diffusers and grilles) appear in good clean condition with no missing panels or loose hanging pieces. It should also not make excessive noise or vibrate a lot. - Miscellaneous (e.g. check room temperature settings, adjustment of timer clock) Full system maintenance of air- conditioning, ventilation systems, and hot air curtains: temperature control, refrigerating fluids check, pressure check, trap cleaning, check all pipe, change filters, clean out drip trays and install chlorine tablets. twice a year before season change (summer-winter) For couple of stores in shopping centers.