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  <xs:element id="aaon_ScheduleOfEmployeeMedicalPlanTableTextBlock" abstract="false" name="ScheduleOfEmployeeMedicalPlanTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="aaon_TriggeringEventDomain" abstract="true" name="TriggeringEventDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aaon_ScheduleofAccountingPoliciesLineItems" abstract="true" name="ScheduleofAccountingPoliciesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="aaon_AAONOklahomaMember" abstract="true" name="AAONOklahomaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aaon_InterestIncomeNoteReceivable" abstract="false" name="InterestIncomeNoteReceivable" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="aaon_AccountsReceivableAllowanceTableTextBlock" abstract="false" name="AccountsReceivableAllowanceTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="aaon_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedContractAssets" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedContractAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="aaon_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOperatingLeaseLiabilities" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOperatingLeaseLiabilities" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="aaon_ShareBasedCompensationArrangementByShareBasedPaymentAwardConversionOfSharesPercent" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardConversionOfSharesPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="aaon_Numberofmajorcustomers" abstract="false" name="Numberofmajorcustomers" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="aaon_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentContingentConsideration" abstract="false" name="BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentContingentConsideration" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="aaon_StockOptionsAMember" abstract="true" name="StockOptionsAMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aaon_CondensingUnitsMember" abstract="true" name="CondensingUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aaon_ForeignSalesRevenueNetMember" abstract="true" name="ForeignSalesRevenueNetMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aaon_ProfitSharingPercentofPretaxProfitPaidtoEligibleEmployeesonQuarterlyBasis" abstract="false" name="ProfitSharingPercentofPretaxProfitPaidtoEligibleEmployeesonQuarterlyBasis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="aaon_LoansAndLeasesReceivableGrossInterestRate" abstract="false" name="LoansAndLeasesReceivableGrossInterestRate" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="aaon_EffectiveJanuary12016Member" abstract="true" name="EffectiveJanuary12016Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aaon_InventoryValuationReservesWriteOffs" abstract="false" name="InventoryValuationReservesWriteOffs" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="aaon_RangeofExercisePrice7Member" abstract="true" name="RangeofExercisePrice7Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aaon_AccountsReceivableCreditLossNetOfAdjustments" abstract="false" name="AccountsReceivableCreditLossNetOfAdjustments" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="aaon_KeyEmployeeRestrictedStockMember" abstract="true" name="KeyEmployeeRestrictedStockMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aaon_BasXPropertiesLLCMember" abstract="true" name="BasXPropertiesLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aaon_PaymentForContractualObligation" abstract="false" name="PaymentForContractualObligation" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="aaon_BusinessCombinationConsiderationTransferredEquityInterestsIssuable" abstract="false" name="BusinessCombinationConsiderationTransferredEquityInterestsIssuable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="aaon_NumberOfVeriableInteresEntities" abstract="false" name="NumberOfVeriableInteresEntities" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="aaon_DataCenterCoolingSolutionsMember" abstract="true" name="DataCenterCoolingSolutionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aaon_ScheduleOfProfitSharingBonusPlanTableTextBlock" abstract="false" name="ScheduleOfProfitSharingBonusPlanTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="aaon_ExtendedProductWarrantiesMaximumLength" abstract="false" name="ExtendedProductWarrantiesMaximumLength" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="aaon_AuditInformationAbstract" abstract="true" name="AuditInformationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="aaon_TriggeringEventAxis" abstract="true" name="TriggeringEventAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="aaon_KeyEmployeesOfBasXMember" abstract="true" name="KeyEmployeesOfBasXMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aaon_WaterSourceHeatPumpsMember" abstract="true" name="WaterSourceHeatPumpsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aaon_StockCompensationPlanAMember" abstract="true" name="StockCompensationPlanAMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aaon_Investor1Member" abstract="true" name="Investor1Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aaon_NewMarketTaxCreditObligationNoncurrent" abstract="false" name="NewMarketTaxCreditObligationNoncurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="aaon_ExercisePriceRange2Member" abstract="true" name="ExercisePriceRange2Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aaon_ScheduleofAccountingPoliciesTable" abstract="true" name="ScheduleofAccountingPoliciesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="aaon_CustomerPrepaymentsCurrent" abstract="false" name="CustomerPrepaymentsCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="aaon_WarehouseSquareFeet" abstract="false" name="WarehouseSquareFeet" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="aaon_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedContractLiabilities" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedContractLiabilities" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="aaon_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionExercisePricePercentageFairMarketValue" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionExercisePricePercentageFairMarketValue" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="aaon_InventoryValuationReservesRollForward" abstract="true" name="InventoryValuationReservesRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="aaon_InterestFromCounterparty" abstract="false" name="InterestFromCounterparty" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="aaon_ScheduleOfShareholdersEquityTable" abstract="true" name="ScheduleOfShareholdersEquityTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="aaon_DirectorandOfficersMember" abstract="true" name="DirectorandOfficersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aaon_MaximumRatioOfTotalLiabilityToNetWorthRequiredForCompliance" abstract="false" name="MaximumRatioOfTotalLiabilityToNetWorthRequiredForCompliance" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
</xs:schema>
