REVISED GUIDELINES FOR AIR CONDITIONING IN …

1 IssueNo. 4 IssueDate:11/ 18 Page1of 6 NABH-AirConditioning_OTREVISEDGUIDELINES FORAIR CONDITIONINGINOPERATION THEATRES(2018)IssueNo. 4 IssueDate:11/ 18 Page2of 6 RevisedGuidelinesforAirConditioninginOpe rationTheatres NABH-AirConditioningOT(2018)Air Conditioningin Technicalcommitteeandvariouslatest internationaland ,theyareNOTMANDATORY fortheSHCO sandHCOsimplementing istotallyleftto HCOwhether been (ErstwhileSuperspecialtyOT):TypeAOTmeans operationtheatresforNeurosciences,Orthop aedics(JointReplacement),Cardiothoracica ndTransplantSurgery(Renal,Liver,heartetc .). (ErstwhileGeneralOT):Thisincludesoperati ontheatresforOphthalmology,day-caresurge riesandall otherbasicsurgical TypeA(ErstwhileSuperSpecialtyOT) : Minimumtotal air changesshould be20basedon biologicalload andthelocation.

2 Thefreshaircomponentoftheairchangeisrequ iredtobeminimum4airchangesoutoftotalmini mum20airchanges. IfHealthcareOrganization(HCO)choosestoha ve 100%fresh airsystemthenappropriateenergysavingdevi ceslikeheatrecoverywheel,runaround (feetperminute)fromnon- 4 IssueDate:11/ 18 Page3of 6 RevisedGuidelinesforAirConditioninginOpe rationTheatres NABH-AirConditioningOT(2018) ( ). bemaintained inOTatalltimes(operational& non-operational hours) :AirissuppliedthroughTerminalHEPA(High-E fficiencyParticulateAir)filtersinthe :TheAHU( ) ,motors& (atrestcondition). :Itshouldbemaintained210C 30C(exceptforJointsreplacementwhere it shouldbe180C 20C)with correspondingrelativehumiditybetween20to 60%,thoughtheidealRHisconsideredtobe55%.

3 Appropriatedevicestomonitoranddisplaythe se TypeB (ErstwhileGeneralOT) : : Pressure: :IssueNo. 4 IssueDate:11/ 18 Page4of 6 RevisedGuidelinesforAirConditioninginOpe rationTheatres NABH-AirConditioningOT(2018)TheAHU( )mustbeanair micronsand99%downto5 beprovidedfor servicingthefilters,motors& (atrestcondition).Note:Class1000meansa cubicfootofairmusthavenomorethan1000part iclesmeasuring andHumidity:Thetemperatureshouldbemainta inedat210C 30 CinsidetheOTatalltimeswithcorrespondingr elativehumiditybetween20to60%.Appropriat edevicestomonitoranddisplaythese OneAHUformultipleOTsispermittedprovidedt hereisaback- haveto beprovided either bythevendor/third :ThelocationofoutdoorairintakeforanAHUmu stnotbelocatednearpotential contaminatedsourceslikeDGexhausthoods,la b exhaustvents, unitsand have pocketsformicrobial growthwhich (constructed/renovatedpriorto2015)IssueN o.

4 4 IssueDate:11/ 18 Page5of 6 RevisedGuidelinesforAirConditioninginOpe rationTheatres NABH-AirConditioningOT(2018) ,ceilingsuspendedAHUispermittedprovidedt hereisaccessibilityformaintenanceoffilte rsandother ascosteffectivesolutionforOTsinSHCO/Eye constructionsandTypeAandType BOTsaboveintermsofairchanges, particlecount,positivepressure,temperatu re,humidityandairvelocitywill haveto bemetbysuchOTs in (maybewithouttemperaturecontrol).Variabl efrequencydevices(VFD) pressurerelationship is not disturbed thesystem include: Temperatureand Humiditycheck Airparticulatecount AirChangeRateCalculation Airvelocityatoutletofterminalfiltrationu nit/filters Pressure DifferentiallevelsoftheOTwithrespecttoam bient /adjoiningareas ValidationofHEPA Filtersbyappropriatetests.

5 PreventiveMaintenanceofthesystem:Itisrec ommendedthatperiodicpreventivemaintenanc ebecarried outintermsofcleaningofprefilters, (AmericanSocietyofHeating,Refrigeratinga ndAirConditioningEngineers)/ASHE 4 IssueDate:11/ 18 Page6of 6 RevisedGuidelinesforAirConditioninginOpe rationTheatres NABH-AirConditioningOT(2018) , operatingroomventilationsystemsintheprot ectionofsurgical clinics2ndedition,ASHRAE designguidelinesHVAC guide2017 MinistryofPublicworksNewDelhi 2017.