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  <xs:element id="aaon_DefinedBenefitPlanHeathSavingAccountPayments" abstract="false" name="DefinedBenefitPlanHeathSavingAccountPayments" nillable="true" xbrli:periodType="duration" 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_A2010StockRepurchaseProgramMember" abstract="true" name="A2010StockRepurchaseProgramMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="aaon_A2006DirectorandOfficerRepurchaseProgramMember" abstract="true" name="A2006DirectorandOfficerRepurchaseProgramMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="aaon_BasXLLCMember" abstract="true" name="BasXLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="aaon_ScheduleOfShareholdersEquityLineItems" abstract="true" name="ScheduleOfShareholdersEquityLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="aaon_BusinessCombinationConsiderationTransferredEquityInterestsIssuable" abstract="false" name="BusinessCombinationConsiderationTransferredEquityInterestsIssuable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:perShareItemType"/>
  <xs:element id="aaon_StockholdersEquityNoteStockSplitNumberOfAdditionalSharesIssuedDuringSplit" abstract="false" name="StockholdersEquityNoteStockSplitNumberOfAdditionalSharesIssuedDuringSplit" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="aaon_StockholdersEquityNoteStockSplitNumberOfSharesHeldByShareholderBeforeSplit" abstract="false" name="StockholdersEquityNoteStockSplitNumberOfSharesHeldByShareholderBeforeSplit" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="aaon_PaymentsForStockSplit" abstract="false" name="PaymentsForStockSplit" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="aaon_DeferredTaxAssetAmortizationTerm" abstract="false" name="DeferredTaxAssetAmortizationTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="aaon_Investor1Member" abstract="true" name="Investor1Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="aaon_LoansAndLeasesReceivableGrossTerm" abstract="false" name="LoansAndLeasesReceivableGrossTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="aaon_LoansAndLeasesReceivableGrossInterestRate" abstract="false" name="LoansAndLeasesReceivableGrossInterestRate" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <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_LoansAndLeasesReceivableGrossCompliancePeriod" abstract="false" name="LoansAndLeasesReceivableGrossCompliancePeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="aaon_LoansAndLeasesReceivableRecapturePercentage" abstract="false" name="LoansAndLeasesReceivableRecapturePercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <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_RebeccaA.ThompsonTradingArrangementAdoptedMember" abstract="true" name="RebeccaA.ThompsonTradingArrangementAdoptedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aaon_RebeccaA.ThompsonMember" abstract="true" name="RebeccaA.ThompsonMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="aaon_RebeccaA.ThompsonTradingArrangementTerminatedMember" abstract="true" name="RebeccaA.ThompsonTradingArrangementTerminatedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
