﻿<?xml version="1.0" encoding="utf-8"?>
<Return xmlns="http://www.irs.gov/efile" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.irs.gov/efile" returnVersion="2023v5.1">
  <ReturnHeader binaryAttachmentCnt="0">
    <ReturnTs>2024-12-04T14:39:23-06:00</ReturnTs>
    <TaxPeriodEndDt>2024-06-30</TaxPeriodEndDt>
    <PreparerFirmGrp>
      <PreparerFirmEIN>261600907</PreparerFirmEIN>
      <PreparerFirmName>
        <BusinessNameLine1Txt>ROOF GERDES ERLBACHER PLC</BusinessNameLine1Txt>
      </PreparerFirmName>
      <PreparerUSAddress>
        <AddressLine1Txt>2721 SW 30TH ST</AddressLine1Txt>
        <CityNm>DES MOINES</CityNm>
        <StateAbbreviationCd>IA</StateAbbreviationCd>
        <ZIPCd>50321</ZIPCd>
      </PreparerUSAddress>
    </PreparerFirmGrp>
    <ReturnTypeCd>990EZ</ReturnTypeCd>
    <TaxPeriodBeginDt>2023-07-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>237132011</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>IOWA CHAPTER ASHRAE</BusinessNameLine1Txt>
        <BusinessNameLine2Txt>&amp; A-C ENGINEERS</BusinessNameLine2Txt>
      </BusinessName>
      <BusinessNameControlTxt>IOWA</BusinessNameControlTxt>
      <PhoneNum>5156614412</PhoneNum>
      <USAddress>
        <AddressLine1Txt>PO BOX 3686</AddressLine1Txt>
        <CityNm>URBANDALE</CityNm>
        <StateAbbreviationCd>IA</StateAbbreviationCd>
        <ZIPCd>50323</ZIPCd>
      </USAddress>
    </Filer>
    <BusinessOfficerGrp>
      <PersonNm>JOSEPH MOENCH</PersonNm>
      <PersonTitleTxt>COMMITTEE CHAIR ON BRD OF GOVERNORS</PersonTitleTxt>
      <PhoneNum>5156614412</PhoneNum>
      <SignatureDt>2024-12-04</SignatureDt>
      <DiscussWithPaidPreparerInd>1</DiscussWithPaidPreparerInd>
    </BusinessOfficerGrp>
    <IRSResponsiblePrtyInfoCurrInd>0</IRSResponsiblePrtyInfoCurrInd>
    <PreparerPersonGrp>
      <PreparerPersonNm>RYAN ROOF</PreparerPersonNm>
      <PTIN>P00810965</PTIN>
      <PhoneNum>5153625672</PhoneNum>
    </PreparerPersonGrp>
    <TaxYr>2023</TaxYr>
    <BuildTS>2024-10-15 13:58:12Z</BuildTS>
  </ReturnHeader>
  <ReturnData documentCnt="4">
    <IRS990EZ documentId="RetDoc1234200001" referenceDocumentId="RetDoc1051800001 RetDoc2278000001">
      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <ScheduleBNotRequiredInd>X</ScheduleBNotRequiredInd>
      <WebsiteAddressTxt>WWW.ASHRAEIOWA.ORG</WebsiteAddressTxt>
      <Organization501c3Ind referenceDocumentId="RetDoc1039100001">X</Organization501c3Ind>
      <TypeOfOrganizationCorpInd>X</TypeOfOrganizationCorpInd>
      <GrossReceiptsAmt>78710</GrossReceiptsAmt>
      <InfoInScheduleOPartIInd>X</InfoInScheduleOPartIInd>
      <ContributionsGiftsGrantsEtcAmt>300</ContributionsGiftsGrantsEtcAmt>
      <MembershipDuesAmt>15730</MembershipDuesAmt>
      <GrossSalesOfInventoryAmt>62677</GrossSalesOfInventoryAmt>
      <CostOfGoodsSoldAmt>66229</CostOfGoodsSoldAmt>
      <GrossProfitLossSlsOfInvntryAmt>-3552</GrossProfitLossSlsOfInvntryAmt>
      <OtherRevenueTotalAmt>3</OtherRevenueTotalAmt>
      <TotalRevenueAmt>12481</TotalRevenueAmt>
      <PrintingPublicationsPostageAmt>296</PrintingPublicationsPostageAmt>
      <OtherExpensesTotalAmt>21958</OtherExpensesTotalAmt>
      <TotalExpensesAmt>22254</TotalExpensesAmt>
      <ExcessOrDeficitForYearAmt>-9773</ExcessOrDeficitForYearAmt>
      <NetAssetsOrFundBalancesBOYAmt>46990</NetAssetsOrFundBalancesBOYAmt>
      <OtherChangesInNetAssetsAmt>0</OtherChangesInNetAssetsAmt>
      <NetAssetsOrFundBalancesEOYAmt>37217</NetAssetsOrFundBalancesEOYAmt>
      <CashSavingsAndInvestmentsGrp>
        <BOYAmt>46990</BOYAmt>
        <EOYAmt>37217</EOYAmt>
      </CashSavingsAndInvestmentsGrp>
      <Form990TotalAssetsGrp>
        <BOYAmt>46990</BOYAmt>
        <EOYAmt>37217</EOYAmt>
      </Form990TotalAssetsGrp>
      <SumOfTotalLiabilitiesGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </SumOfTotalLiabilitiesGrp>
      <NetAssetsOrFundBalancesGrp>
        <BOYAmt>46990</BOYAmt>
        <EOYAmt>37217</EOYAmt>
      </NetAssetsOrFundBalancesGrp>
      <InfoInScheduleOPartIIIInd>X</InfoInScheduleOPartIIIInd>
      <PrimaryExemptPurposeTxt>TO ADVANCE THE ARTS AND SCIENCES OF HEATING, VENTILATION, AIR CONDITIONING AND REFRIGERATION TO SERVE HUMANITY AND PROMOTE A SUSTAINABLE WORLD.</PrimaryExemptPurposeTxt>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>ASHRAE EDUCATION, TECHNICAL INFORMATION AND ALL OTHER ACTIVITIES AND PRODUCTS WILL ALWAYS REFLECT THE BEST PRACTICES THAT LEAD OUR INDUSTRY. WE STRIVE FOR CONTINUOUS IMPROVEMENT AND INNOVATION IN ALL OUR PRACTICES AND PRODUCTS.</DescriptionProgramSrvcAccomTxt>
        <GrantsAndAllocationsAmt>0</GrantsAndAllocationsAmt>
        <ProgramServiceExpensesAmt>0</ProgramServiceExpensesAmt>
      </ProgramSrvcAccomplishmentGrp>
      <TotalProgramServiceExpensesAmt>0</TotalProgramServiceExpensesAmt>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>PETER ERNZEN</PersonNm>
        <TitleTxt>PAST PRESIDENT</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>TYSON SCHEIDECKER</PersonNm>
        <TitleTxt>BOG</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>GRANT VANDERHEIDEN</PersonNm>
        <TitleTxt>BOG</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>ADAM PULS</PersonNm>
        <TitleTxt>BOG</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>JAY JASPER</PersonNm>
        <TitleTxt>BOG</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>MATT SWENKA</PersonNm>
        <TitleTxt>PRESIDENT</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>DAN BLAKE</PersonNm>
        <TitleTxt>PRESIDENT - ELECT</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>CHRISTINE REINDERS</PersonNm>
        <TitleTxt>TREASURER</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>JOEL LOGAN</PersonNm>
        <TitleTxt>SECRETARY</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>JOSEPH MOENCH</PersonNm>
        <TitleTxt>COMMITTEE CHAIR</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <InfoInScheduleOPartVInd>X</InfoInScheduleOPartVInd>
      <ActivitiesNotPreviouslyRptInd>0</ActivitiesNotPreviouslyRptInd>
      <ChgMadeToOrgnzngDocNotRptInd>0</ChgMadeToOrgnzngDocNotRptInd>
      <OrganizationHadUBIInd>0</OrganizationHadUBIInd>
      <SubjectToProxyTaxInd>0</SubjectToProxyTaxInd>
      <OrganizationDissolvedEtcInd>0</OrganizationDissolvedEtcInd>
      <DirectIndirectPltclExpendAmt>0</DirectIndirectPltclExpendAmt>
      <MadeLoansToFromOfficersInd>0</MadeLoansToFromOfficersInd>
      <TaxImposedUnderIRC4911Amt>0</TaxImposedUnderIRC4911Amt>
      <TaxImposedUnderIRC4912Amt>0</TaxImposedUnderIRC4912Amt>
      <TaxImposedUnderIRC4955Amt>0</TaxImposedUnderIRC4955Amt>
      <EngagedInExcessBenefitTransInd>0</EngagedInExcessBenefitTransInd>
      <TaxImposedOnOrganizationMgrAmt>0</TaxImposedOnOrganizationMgrAmt>
      <TaxReimbursedByOrganizationAmt>0</TaxReimbursedByOrganizationAmt>
      <ProhibitedTaxShelterTransInd>0</ProhibitedTaxShelterTransInd>
      <BooksInCareOfDetail>
        <BusinessName>
          <BusinessNameLine1Txt>TYSON SCHEIDECKER</BusinessNameLine1Txt>
        </BusinessName>
        <USAddress>
          <AddressLine1Txt>PO BOX 3686</AddressLine1Txt>
          <CityNm>URBANDALE</CityNm>
          <StateAbbreviationCd>IA</StateAbbreviationCd>
          <ZIPCd>50323</ZIPCd>
        </USAddress>
        <PhoneNum>5156614412</PhoneNum>
      </BooksInCareOfDetail>
      <ForeignFinancialAccountInd>0</ForeignFinancialAccountInd>
      <ForeignOfficeInd>0</ForeignOfficeInd>
      <DonorAdvisedFndsInd>0</DonorAdvisedFndsInd>
      <OperateHospitalInd>0</OperateHospitalInd>
      <TanningServicesProvidedInd>0</TanningServicesProvidedInd>
      <RelatedOrganizationCtrlEntInd>0</RelatedOrganizationCtrlEntInd>
      <PoliticalCampaignActyInd>0</PoliticalCampaignActyInd>
      <LobbyingActivitiesInd>0</LobbyingActivitiesInd>
      <SchoolOperatingInd>0</SchoolOperatingInd>
      <TrnsfrExmptNonChrtblRltdOrgInd>0</TrnsfrExmptNonChrtblRltdOrgInd>
      <PartVIOfCompOfHghstPdEmplTxt>NONE</PartVIOfCompOfHghstPdEmplTxt>
      <PartVIHghstPdCntrctProfSrvcTxt>NONE</PartVIHghstPdCntrctProfSrvcTxt>
      <FiledScheduleAInd>1</FiledScheduleAInd>
    </IRS990EZ>
    <IRS990ScheduleA documentId="RetDoc1039100001">
      <PubliclySupportedOrg509a2Ind>X</PubliclySupportedOrg509a2Ind>
      <GiftsGrantsContrisRcvd509Grp>
        <CurrentTaxYearMinus4YearsAmt>23005</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>14885</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>14885</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>16295</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>16030</CurrentTaxYearAmt>
        <TotalAmt>85100</TotalAmt>
      </GiftsGrantsContrisRcvd509Grp>
      <GrossReceiptsAdmissionsGrp>
        <CurrentTaxYearMinus4YearsAmt>17445</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>58559</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>58560</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>47945</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>62677</CurrentTaxYearAmt>
        <TotalAmt>245186</TotalAmt>
      </GrossReceiptsAdmissionsGrp>
      <Total509Grp>
        <CurrentTaxYearMinus4YearsAmt>40450</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>73444</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>73445</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>64240</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>78707</CurrentTaxYearAmt>
        <TotalAmt>330286</TotalAmt>
      </Total509Grp>
      <AmountsRcvdDsqlfyPersonGrp>
        <TotalAmt>0</TotalAmt>
      </AmountsRcvdDsqlfyPersonGrp>
      <SubstantialContributorsAmtGrp>
        <TotalAmt>0</TotalAmt>
      </SubstantialContributorsAmtGrp>
      <SubstAndDsqlfyPrsnsTotGrp>
        <TotalAmt>0</TotalAmt>
      </SubstAndDsqlfyPrsnsTotGrp>
      <PublicSupportTotal509Amt>330286</PublicSupportTotal509Amt>
      <GrossInvestmentIncome509Grp>
        <CurrentTaxYearMinus4YearsAmt>4</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>4</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>4</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>3</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>3</CurrentTaxYearAmt>
        <TotalAmt>18</TotalAmt>
      </GrossInvestmentIncome509Grp>
      <InvestmentIncomeAndUBTIGrp>
        <CurrentTaxYearMinus4YearsAmt>4</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>4</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>4</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>3</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>3</CurrentTaxYearAmt>
        <TotalAmt>18</TotalAmt>
      </InvestmentIncomeAndUBTIGrp>
      <TotalSupportCalendarYearGrp>
        <CurrentTaxYearMinus4YearsAmt>40454</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>73448</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>73449</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>64243</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>78710</CurrentTaxYearAmt>
        <TotalAmt>330304</TotalAmt>
      </TotalSupportCalendarYearGrp>
      <PublicSupportCY509Pct>0.99990</PublicSupportCY509Pct>
      <PublicSupportPY509Pct>0.99990</PublicSupportPY509Pct>
      <InvestmentIncomeCYPct>0.00010</InvestmentIncomeCYPct>
      <InvestmentIncomePYPct>0.00010</InvestmentIncomePYPct>
      <ThirtyThrPctSuprtTestsCY509Ind>X</ThirtyThrPctSuprtTestsCY509Ind>
    </IRS990ScheduleA>
    <IRS990ScheduleO documentId="RetDoc1051800001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990-EZ, PART I, LINE 7 - SALES OF INVENTORY</FormAndLineReferenceDesc>
        <ExplanationTxt>INCOME: GROSS RECEIPTS: 62677. RETURNS AND ALLOWANCES: 0. LESS COST OF GOODS SOLD: 66229. GROSS PROFIT: -3552. COST OF GOODS SOLD: INVENTORY AT BEGINNING OF YEAR: 0. MERCHANDISE PURCHASED: 0. COST OF LABOR: 0. MATERIALS AND SUPPLIES: 0. OTHER COSTS: 66229. INVENTORY AT END OF YEAR: 0. COST OF GOODS SOLD: 66229.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990-EZ, PART I, LINE 7B - OTHER COSTS</FormAndLineReferenceDesc>
        <ExplanationTxt>DESCRIPTION: GOLF OUTING EXPENSES. AMOUNT: 47811. DESCRIPTION: MEETING EXPENSES. AMOUNT: 15402. DESCRIPTION: PRODUCT DIRECTORIES EXPENSES. AMOUNT: 3016. TOTAL INCLUDED ON FORM 990-EZ, PART I, LINE 7B: 66229.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990-EZ, PART I, LINE 8 - OTHER REVENUE</FormAndLineReferenceDesc>
        <ExplanationTxt>DESCRIPTION: INTEREST INCOME. AMOUNT: 3.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990-EZ, PART I, LINE 16 - OTHER EXPENSES</FormAndLineReferenceDesc>
        <ExplanationTxt>DESCRIPTION: REGION VI DUES. AMOUNT: 1308. DESCRIPTION: RP PAYOUTS. AMOUNT: 7581. DESCRIPTION: ACCOUNTING. AMOUNT: 500. DESCRIPTION: STUDENT SCHOLARSHIPS. AMOUNT: 5000. DESCRIPTION: AWARDS. AMOUNT: 2027. DESCRIPTION: MISCELLAOUS. AMOUNT: 1147. DESCRIPTION: BOG MEETING EXPENSES. AMOUNT: 2811. DESCRIPTION: CONFERENCE REIMBURSEMENTS. AMOUNT: 1584. TOTAL TO FORM 990-EZ, LINE 16: 21958.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
    <TransferPrsnlBnftContractsDecl documentId="RetDoc2278000001">
      <DeclarationDesc>THE ORGANIZATION DID NOT, DURING THE YEAR, RECEIVE ANY FUNDS, DIRECTLY,OR INDIRECTLY, TO PAY PREMIUMS ON A PERSONAL BENEFIT CONTRACT.THE ORGANIZATION, DID NOT, DURING THE YEAR, PAY ANY PREMIUMS, DIRECTLY,OR INDIRECTLY, ON A PERSONAL BENEFIT CONTRACT.</DeclarationDesc>
    </TransferPrsnlBnftContractsDecl>
  </ReturnData>
</Return>