* Modular OT / General OT / Normal OT * * Modular OT / General OT / Normal OT room should preferably be square in shape for effectiveness of Laminar Air Flow system avoiding convenient pockets of stagnant air caused microbial growth and for better asepsis. * Laminar size shall be 2400 x 2400 mm for Super Speciality & 2400 x 1800 mm for General OT / Normal OT. * AHU is either for supply of 100% fresh air with 25 ACPH or 25 ACPH with 5 fresh air as per NABH. * Ideally, AHU blower should run 24 x 7 to keep OT free from Bacteria. At the idle condition of OT, AHU blower will Run without Air-conditioning. * Required condition of air management in the Modular OT (Super Speciality OT) * Classifications - Class 100 (particles measuring 0.5 microns or larger/ cubic feet as per NABH for Super Speciality OT) * Bacteriological class - B (5CFU/m3) * Particle decontamination Kinetics - 5 min * Biological decontamination kinetics - 5 min * GMP Annex I classification - Class A * ISO 14644/1/NABH classification - Is0 5 (at rest condition) * The air quality at the supply i.e. At the grill level should be class 1000 (particles measuring 0.5 microns or larger/ cubic feet as per NABH) / ISO Class 6 (at rest condition) for General OT. * The temperature at 21 +/- 3 degree C with corresponding relative Humidity between 45 - 60% should be maintained inside the OT all the time. * OT should kept under Positive pressure (15 pascal) as per ISO 14644 for prevention of infection. * Exhaust cabinet with blower should be equipped for case of fumigation in OT. Return Air riser should be placed at the four corners and connected with AHU