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  <xs:element id="lii_EquitySecuritiesForeignMember" abstract="true" name="EquitySecuritiesForeignMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="lii_EmployeeStockPurchasePlanESPPOfferingPeriod" abstract="false" name="EmployeeStockPurchasePlanESPPOfferingPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="lii_ScheduleOfFairValueOfRestrictedStockUnitsAndRelatedTaxDeductionsTableTextBlock" abstract="false" name="ScheduleOfFairValueOfRestrictedStockUnitsAndRelatedTaxDeductionsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="lii_DefinedBenefitPlansAdjustmentsRecognizedInNetPeriodicBenefitCostAndOtherComprehensiveIncomeLoss" abstract="false" name="DefinedBenefitPlansAdjustmentsRecognizedInNetPeriodicBenefitCostAndOtherComprehensiveIncomeLoss" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="lii_IncreaseDecreaseinOperatingleaseassetandliabilitynet" abstract="false" name="IncreaseDecreaseinOperatingleaseassetandliabilitynet" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="lii_ProgramFee" abstract="false" name="ProgramFee" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="lii_USEquitySecuritiesMember" abstract="false" name="USEquitySecuritiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="lii_ScheduleOfFairValueOfPerformanceShareUnitsAndRelatedTaxDeductionsTableTextBlock" abstract="false" name="ScheduleOfFairValueOfPerformanceShareUnitsAndRelatedTaxDeductionsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="lii_DefinedBenefitPlanByPlanAssetMajorGroupCategoriesDomain" abstract="false" name="DefinedBenefitPlanByPlanAssetMajorGroupCategoriesDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="lii_InternationalMember" abstract="false" name="InternationalMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="lii_MaximumSecuritizationAsPercentageOfNetPoolBalance" abstract="false" name="MaximumSecuritizationAsPercentageOfNetPoolBalance" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="lii_EligibleAmountAvailableUnderAssetSecuritization" abstract="false" name="EligibleAmountAvailableUnderAssetSecuritization" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="lii_ContractwithCustomerAssetLiabilityNet" abstract="false" name="ContractwithCustomerAssetLiabilityNet" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="lii_SharebasedCompensationSharesAuthorizedunderStockOptionPlansExercisePriceRangeExercisableNonOptionEquityInstrumentsWeightedAverageRemainingContractualTerm" abstract="false" name="SharebasedCompensationSharesAuthorizedunderStockOptionPlansExercisePriceRangeExercisableNonOptionEquityInstrumentsWeightedAverageRemainingContractualTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="lii_A2025NotesMember" abstract="true" name="A2025NotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="lii_PercentageOfLeaseBalanceAsFinalPaymentEndOfLeaseTerm" abstract="false" name="PercentageOfLeaseBalanceAsFinalPaymentEndOfLeaseTerm" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="lii_AreaOfLeasedOfficeBuilding" abstract="false" name="AreaOfLeasedOfficeBuilding" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:areaItemType"/>
  <xs:element id="lii_PensionFundMember" abstract="false" name="PensionFundMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="lii_A2027NotesMember" abstract="true" name="A2027NotesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="lii_SharebasedCompensationArrangementbySharebasedPaymentAwardNonOptionEquityInstrumentsExercisableNumber" abstract="false" name="SharebasedCompensationArrangementbySharebasedPaymentAwardNonOptionEquityInstrumentsExercisableNumber" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="lii_CashPaidDuringPeriodForAbstract" abstract="true" name="CashPaidDuringPeriodForAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="lii_ScheduleOfShareBasedCompensationSharesAuthorizedUnderEquityInstrumentOtherThanOptionPlansByExercisePriceRangeTableTextBlock" abstract="false" name="ScheduleOfShareBasedCompensationSharesAuthorizedUnderEquityInstrumentOtherThanOptionPlansByExercisePriceRangeTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="lii_DefinedBenefitPlanByPlanAssetCategoriesValuationAxis" abstract="true" name="DefinedBenefitPlanByPlanAssetCategoriesValuationAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="lii_NetLossgainfromnaturaldisaster" abstract="false" name="NetLossgainfromnaturaldisaster" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="lii_PayoutPercentage" abstract="false" name="PayoutPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="lii_DebtinstrumentCovenantfordebtnotpaid" abstract="false" name="DebtinstrumentCovenantfordebtnotpaid" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="lii_UndistributedAndUnvestedPerformanceShareUnits" abstract="false" name="UndistributedAndUnvestedPerformanceShareUnits" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="lii_AssetSecuritizationBorrowingCapacity" abstract="false" name="AssetSecuritizationBorrowingCapacity" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="lii_NavMember" abstract="false" name="NavMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="lii_SharebasedCompensationArrangementbySharebasedPaymentAwardNonOptionEquityInstrumentsGrantsinPeriodWeightedAverageGrantDateFairValue" abstract="false" name="SharebasedCompensationArrangementbySharebasedPaymentAwardNonOptionEquityInstrumentsGrantsinPeriodWeightedAverageGrantDateFairValue" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="lii_AcceleratedShareRepurchaseProgramRatioOfStockDeliveredToSharesExpectedToBeRepurchased" abstract="false" name="AcceleratedShareRepurchaseProgramRatioOfStockDeliveredToSharesExpectedToBeRepurchased" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="lii_AssumedHealthCareCostTrendRates" abstract="true" name="AssumedHealthCareCostTrendRates" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="lii_PensionFundsMember" abstract="true" name="PensionFundsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="lii_SharebasedCompensationArrangementbySharebasedPaymentAwardNonOptionEquityInstrumentsExercisableIntrinsicValue" abstract="false" name="SharebasedCompensationArrangementbySharebasedPaymentAwardNonOptionEquityInstrumentsExercisableIntrinsicValue" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="lii_PercentageOfMaximumAvailableAmountUsedToChargeUnusedFee" abstract="false" name="PercentageOfMaximumAvailableAmountUsedToChargeUnusedFee" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="lii_MinimumAmountOfPrincipalOrInterestDueOnIndebtednessOrReceivableSecuritization" abstract="false" name="MinimumAmountOfPrincipalOrInterestDueOnIndebtednessOrReceivableSecuritization" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="lii_USJointVentureMember" abstract="true" name="USJointVentureMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="lii_Reservebalanceobsoleteandslowmovinginventories" abstract="false" name="Reservebalanceobsoleteandslowmovinginventories" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="lii_ExercisePriceRange3Member" abstract="true" name="ExercisePriceRange3Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="lii_SharebasedCompensationSharesAuthorizedunderNonOptionEquityInstrumentPlansExercisePriceRangeLowerRangeLimit" abstract="false" name="SharebasedCompensationSharesAuthorizedunderNonOptionEquityInstrumentPlansExercisePriceRangeLowerRangeLimit" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="lii_SharebasedCompensationArrangementbySharebasedPaymentAwardNonOptionEquityInstrumentsOutstandingIntrinsicValue" abstract="false" name="SharebasedCompensationArrangementbySharebasedPaymentAwardNonOptionEquityInstrumentsOutstandingIntrinsicValue" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="lii_RevenueFromTransactionsWithMajorCustomers" abstract="false" name="RevenueFromTransactionsWithMajorCustomers" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="lii_SegmentReportingReconcilingItemInLossesAndOtherExpensesFromSegmentToConsolidatedAmount" abstract="false" name="SegmentReportingReconcilingItemInLossesAndOtherExpensesFromSegmentToConsolidatedAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="lii_AssetSecuritizationMember" abstract="true" name="AssetSecuritizationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="lii_SharebasedCompensationArrangementbySharebasedPaymentAwardNonOptionEquityInstrumentsOutstandingWeightedAverageExercisePrice" abstract="false" name="SharebasedCompensationArrangementbySharebasedPaymentAwardNonOptionEquityInstrumentsOutstandingWeightedAverageExercisePrice" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="lii_SharebasedCompensationArrangementbySharebasedPaymentAwardNonOptionEquityInstrumentsExercisableWeightedAverageExercisePrice" abstract="false" name="SharebasedCompensationArrangementbySharebasedPaymentAwardNonOptionEquityInstrumentsExercisableWeightedAverageExercisePrice" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="lii_Globalintangiblelowtaxedincome" abstract="false" name="Globalintangiblelowtaxedincome" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="lii_MinimumPercentageOfConsolidatedNetSalesFromSingleCustomer" abstract="false" name="MinimumPercentageOfConsolidatedNetSalesFromSingleCustomer" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="lii_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisesInPeriodIntrinsicValue" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisesInPeriodIntrinsicValue" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="lii_ExercisePriceRange1Member" abstract="true" name="ExercisePriceRange1Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="lii_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitureRate" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitureRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="lii_PercentageOfProjectedBenefitObligationByPensionPlans" abstract="false" name="PercentageOfProjectedBenefitObligationByPensionPlans" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="lii_SharebasedCompensationSharesAuthorizedunderNonOptionEquityInstrumentPlansExercisePriceRangeUpperRangeLimit" abstract="false" name="SharebasedCompensationSharesAuthorizedunderNonOptionEquityInstrumentPlansExercisePriceRangeUpperRangeLimit" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="lii_LossesGainsAndOtherExpensesNetAbstract" abstract="true" name="LossesGainsAndOtherExpensesNetAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="lii_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesProvisionBenefitForTax" abstract="false" name="AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesProvisionBenefitForTax" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="lii_PercentageOfFairValueOfPlanAssetsByPensionPlans" abstract="false" name="PercentageOfFairValueOfPlanAssetsByPensionPlans" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="lii_SubfacilityforSwinglineLoansMember" abstract="true" name="SubfacilityforSwinglineLoansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="lii_DebtInstrumentNumberOfExtensionOptions" abstract="false" name="DebtInstrumentNumberOfExtensionOptions" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="lii_CommingledPoolsCollectiveTrustsMember" abstract="false" name="CommingledPoolsCollectiveTrustsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="lii_LesseeOperatingLeasePercentageOfLeasesRelatingToRealEstate" abstract="false" name="LesseeOperatingLeasePercentageOfLeasesRelatingToRealEstate" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="lii_Noncashpensionsettlementloss" abstract="false" name="Noncashpensionsettlementloss" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="lii_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeTax" abstract="false" name="DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeTax" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="lii_ScheduleOfIntrinsicValueAndTaxBenefitsRelatedToStockAppreciationRightsTableTextBlock" abstract="false" name="ScheduleOfIntrinsicValueAndTaxBenefitsRelatedToStockAppreciationRightsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="lii_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRateInterestCost" abstract="false" name="DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRateInterestCost" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="lii_Definedbenefitplannetperiodicbenefitcostothers" abstract="false" name="Definedbenefitplannetperiodicbenefitcostothers" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="lii_DebtInstrumentCovenantLeverageRatioFollowingMaterialAcquisitionMaximum" abstract="false" name="DebtInstrumentCovenantLeverageRatioFollowingMaterialAcquisitionMaximum" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="lii_ScheduleOfDefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndAmountsRecognizedInOtherComprehensiveIncomeTableAbstract" abstract="true" name="ScheduleOfDefinedBenefitPlanAccumulatedOtherComprehensiveIncomeAndAmountsRecognizedInOtherComprehensiveIncomeTableAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="lii_EligibleAmountsAvailableAndBeneficialInterestsSoldTableTextBlock" abstract="false" name="EligibleAmountsAvailableAndBeneficialInterestsSoldTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="lii_SupplementalInformationAbstract" abstract="true" name="SupplementalInformationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="lii_PurchasePriceOfPropertyAtEndOfLeaseTerm" abstract="false" name="PurchasePriceOfPropertyAtEndOfLeaseTerm" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="lii_AmountAvailableUnderAssetSecuritization" abstract="false" name="AmountAvailableUnderAssetSecuritization" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="lii_SpecialProductQualityAdjustment" abstract="false" name="SpecialProductQualityAdjustment" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
