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        <FormAndLineReferenceDesc>SCHEDULE D, PAGE 3, PART X</FormAndLineReferenceDesc>
        <ExplanationTxt>THE FUND OBTAINED ITS LATEST DETERMINATION LETTER IN JULY 1993, IN WHICH THE INTERNAL REVENUE SERVICE STATED THAT THE FUND, AS THEN DESIGNED, WAS IN COMPLIANCE WITH THE APPLICABLE REQUIREMENTS OF THE INTERNAL REVENUE CODE. THE FUND ADMINISTRATOR AND THE FUND'S TAX COUNSEL BELIEVE THAT THE FUND IS CURRENTLY DESIGNED AND BEING OPERATED IN COMPLIANCE WITH THE APPLICABLE REQUIREMENTS OF THE CODE. THEREFORE, THEY BELIEVE THAT THE FUND WAS TAX-EXEPMT UNDER SECTION 501(C)(5) AS OF THE FINANCIAL STATEMENT DATE. THE FUND FILED THE FORM 5500 EXEMPTION, THUS THE FUND IS NOT REQUIRED TO FILE A FORM 5500 ANNUALLY. THE MODIFIED CASH BASIS OF ACCOUNTING REQUIRES FUND MANAGEMENT TO EVALUATE TAX POSITIONS TAKEN BY THE TRUST AND RECOGNIZE A TAX LIABILITY (OR ASSET) IF THE ORGANIZATION HAS TAKEN AN UNCERTAIN TAX POSITION THAT MORE LIKELY THAN NOT WOULD NOT BE SUSTAINED UPON EXAMINATION BY THE INTERNAL REVENUE SERVICE. THE FUND ADMINISTRATOR HAS ANALYZED THE TAX POSITIONS TAKEN BY THE FUND AND HAS CONCLUDED THAT AS OF DECEMBER 31, 2022, THERE ARE NO UNCERTAIN POSITIONS TAKEN OR EXPECTED TO BE TAKEN THAT WOULD REQUIRE RECOGNITION OF A LIABILITY (OR ASSET) OR DISCLOSURE IN THE FINANCIAL STATEMENTS. THE FUND IS SUBJECT TO ROUTINE AUDITS BY TAXING JURISDICTIONS; HOWEVER, THERE ARE CURRENTLY NO AUDITS FOR ANY TAX PERIOD IN PROGRESS. THE FUND IS SUBJECT TO INCOME TAX EXAMINATIONS BY THE TAXING AUTHORITIES FOR A PERIOD OF THREE YEARS FROM THE DATE THE TAX RETURNS ARE FILED.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE D, PAGE 4, PART XII, LINE 4B</FormAndLineReferenceDesc>
        <ExplanationTxt>BOOK / TAX DEPRECIATION DIFFERENCE 1</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleD>
    <IRS990ScheduleO documentId="RetDoc5">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990 - ORGANIZATION'S MISSION</FormAndLineReferenceDesc>
        <ExplanationTxt>TO EDUCATE AND PREPARE APPRENTICES TO PERFORM ALL ASPECTS OF THE WORK REQUIRED IN THE INDUSTRY WITH THE GOAL OF MAKING EACH APPRENTICE A HIGHLY SKILLED JOURNEYMAN IN THE INSULATION INDUSTRY UPON SATISFACTORY COMPLETION OF THE 4 YEAR PROGRAM.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>FORM 990 IS AVAILABLE FOR REVIEW TO EACH TRUSTEE PRIOR TO FILING WITH THE INTERNAL REVENUE SERVICE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>THE BOARD OF TRUSTEES CONSISTENTLY MONITOR AND ENFORCE COMPLIANCE WITH THE CONFLICT OF INTEREST POLICY. CONFLICT OF INTEREST FORMS ARE REVIEWED AND RETAINED FOR POTENTIAL CONFLICTS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 15B</FormAndLineReferenceDesc>
        <ExplanationTxt>COMPENSATION PROCESS FOR OFFICERS COMPENSATION IS REVIEWED AND APPROVED BY THE TRUSTEEES.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION MAKES ITS GOVERNING DOCUMENTS AND FINANCIAL STATEMENTS AVAILABLE TO THE PUBLIC UPON REQUEST.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XI, LINE 9</FormAndLineReferenceDesc>
        <ExplanationTxt>BOOK / TAX DEPRECIATION DIFFERENCE 1</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
    <IRS990ScheduleR documentId="RetDoc6">
      <IdRelatedTaxExemptOrgGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>INT'L ASSOC OF HEAT &amp; FROST &amp;</BusinessNameLine1Txt>
          <BusinessNameLine2Txt>ALLIED WORKERS</BusinessNameLine2Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>9602 MARTIN LUTHER KING HIGHWAY</AddressLine1Txt>
          <CityNm>LANHAM</CityNm>
          <StateAbbreviationCd>MD</StateAbbreviationCd>
          <ZIPCd>207061839</ZIPCd>
        </USAddress>
        <EIN>530088300</EIN>
        <PrimaryActivitiesTxt>UNION</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MD</LegalDomicileStateCd>
        <ExemptCodeSectionTxt>501C5</ExemptCodeSectionTxt>
        <DirectControllingNACd>N/A</DirectControllingNACd>
        <ControlledOrganizationInd>false</ControlledOrganizationInd>
      </IdRelatedTaxExemptOrgGrp>
      <ReceiptOfIntAnntsRntsRyltsInd>false</ReceiptOfIntAnntsRntsRyltsInd>
      <GiftGrntOrCapContriToOthOrgInd>false</GiftGrntOrCapContriToOthOrgInd>
      <GiftGrntCapContriFromOthOrgInd>false</GiftGrntCapContriFromOthOrgInd>
      <LoansOrGuaranteesToOtherOrgInd>false</LoansOrGuaranteesToOtherOrgInd>
      <LoansOrGuaranteesFromOthOrgInd>false</LoansOrGuaranteesFromOthOrgInd>
      <DivRelatedOrganizationInd>false</DivRelatedOrganizationInd>
      <AssetSaleToOtherOrgInd>false</AssetSaleToOtherOrgInd>
      <AssetPurchaseFromOtherOrgInd>false</AssetPurchaseFromOtherOrgInd>
      <AssetExchangeInd>false</AssetExchangeInd>
      <RentalOfFacilitiesToOthOrgInd>false</RentalOfFacilitiesToOthOrgInd>
      <RentalOfFcltsFromOthOrgInd>false</RentalOfFcltsFromOthOrgInd>
      <PerformOfServicesForOthOrgInd>false</PerformOfServicesForOthOrgInd>
      <PerformOfServicesByOtherOrgInd>false</PerformOfServicesByOtherOrgInd>
      <SharingOfFacilitiesInd>false</SharingOfFacilitiesInd>
      <PaidEmployeesSharingInd>false</PaidEmployeesSharingInd>
      <ReimbursementPaidToOtherOrgInd>false</ReimbursementPaidToOtherOrgInd>
      <ReimbursementPaidByOtherOrgInd>false</ReimbursementPaidByOtherOrgInd>
      <TransferToOtherOrgInd>false</TransferToOtherOrgInd>
      <TransferFromOtherOrgInd>false</TransferFromOtherOrgInd>
    </IRS990ScheduleR>
  </ReturnData>
</Return>
