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<!--REG30 V1.0 (16-10-2025)-->
<xbrli:xbrl xmlns:in-capmkt="http://www.sebi.gov.in/xbrl/2025-08-31/in-capmkt" xmlns:in-capmkt-ent="http://www.sebi.gov.in/xbrl/Regulation_30_Restructuring/2025-08-31/in-capmkt/in-capmkt-ent" xmlns:in-capmkt-roles="http://www.sebi.gov.in/xbrl/Regulation_30_Restructuring/2025-08-31/in-capmkt-roles" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:net="http://www.xbrl.org/2009/role/net" xmlns:num="http://www.xbrl.org/dtr/type/numeric" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:iso4217="http://www.xbrl.org/2003/iso4217" xmlns:negated="http://www.xbrl.org/2009/role/negated" xmlns:xbrldi="http://xbrl.org/2006/xbrldi" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:xl="http://www.xbrl.org/2003/XLink"><link:schemaRef xlink:type="simple" xlink:href="in-capmkt-ent-2025-08-31.xsd"/><xbrli:context id="OneI"><xbrli:entity><xbrli:identifier scheme="http://www.sebi.gov.in/in-capmkt/ScripCode">500411</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:instant>2026-07-30</xbrli:instant></xbrli:period></xbrli:context><xbrli:context id="OneD"><xbrli:entity><xbrli:identifier scheme="http://www.sebi.gov.in/in-capmkt/ScripCode">500411</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:startDate>2026-07-30</xbrli:startDate><xbrli:endDate>2026-07-30</xbrli:endDate></xbrli:period></xbrli:context><in-capmkt:ScripCode contextRef="OneI">500411</in-capmkt:ScripCode><in-capmkt:NameOfTheCompany contextRef="OneI">THERMAX LIMITED</in-capmkt:NameOfTheCompany><in-capmkt:NSESymbol contextRef="OneI">THERMAX</in-capmkt:NSESymbol><in-capmkt:MSEISymbol contextRef="OneI">NOTLISTED</in-capmkt:MSEISymbol><in-capmkt:ISIN contextRef="OneI">INE152A01029</in-capmkt:ISIN><in-capmkt:TypeOfAnnouncementPertainingToRegulation30Restructuring contextRef="OneD">New</in-capmkt:TypeOfAnnouncementPertainingToRegulation30Restructuring><in-capmkt:TypeOfEventOfAnnouncementPertainingToRegulation30Restructuring contextRef="OneD">Amalgamation/ Merger</in-capmkt:TypeOfEventOfAnnouncementPertainingToRegulation30Restructuring><in-capmkt:WhetherEventOrInformationDisclosedIsAnOutcomeOfBoardMeeting contextRef="OneD">true</in-capmkt:WhetherEventOrInformationDisclosedIsAnOutcomeOfBoardMeeting><in-capmkt:DateOfBoardMeeting contextRef="OneI">2026-07-30</in-capmkt:DateOfBoardMeeting><in-capmkt:EndTimeOfBoardMeeting contextRef="OneD">15:40:00</in-capmkt:EndTimeOfBoardMeeting><in-capmkt:DateOfReport contextRef="OneI">2026-07-30</in-capmkt:DateOfReport><in-capmkt:WhetherTheAmalgamationOrMergerWouldFallWithinRelatedPartyTransactions contextRef="OneD">true</in-capmkt:WhetherTheAmalgamationOrMergerWouldFallWithinRelatedPartyTransactions><in-capmkt:DateOfBoardMeetingForAmalgamationInWhichRPTApprovalTaken contextRef="OneI">2026-07-30</in-capmkt:DateOfBoardMeetingForAmalgamationInWhichRPTApprovalTaken><in-capmkt:WhetherAmalgamationOrMergerEventRPTIsMaterial contextRef="OneD">false</in-capmkt:WhetherAmalgamationOrMergerEventRPTIsMaterial><in-capmkt:WhetherThePromoterOrPromoterGroupOrGroupCompaniesIncludingAssociateOrHoldingOrSubsidiaryOrDirectorOrKMPOrSMPAndItsRelativesHaveAnyInterestInTheEntityBeingAmalgamated contextRef="OneD">false</in-capmkt:WhetherThePromoterOrPromoterGroupOrGroupCompaniesIncludingAssociateOrHoldingOrSubsidiaryOrDirectorOrKMPOrSMPAndItsRelativesHaveAnyInterestInTheEntityBeingAmalgamated><in-capmkt:WhetherAmalgamationOrMergerIsDoneAtArmsLength contextRef="OneD">true</in-capmkt:WhetherAmalgamationOrMergerIsDoneAtArmsLength><in-capmkt:AreaOfBusinessOfTheEntitiesForAmalgamationOrMergerEvent contextRef="OneI">Transferor Company: 
Thermax Cooling Solutions Limited is engaged in the business of setting up Energy Projects, Energy Exchange Platform and providing Energy Services including provision of electrostatic precipitators, regenerative air preheaters and related services etc. 

Transferee Company:
Thermax Limited, listed on BSE and NSE, is a leading conglomerate in the energy and environment space and a trusted partner in energy transition. Thermax’s extensive portfolio includes clean air, clean energy, clean water and chemical solutions.</in-capmkt:AreaOfBusinessOfTheEntitiesForAmalgamationOrMergerEvent><in-capmkt:RationaleForAmalgamationOrMerger contextRef="OneI">In order to simplify overall group structure and reduce administrative overheads, Management has proposed consolidation of Transferor Company with the Company which is expected to result in a significant improvement in certain key financial ratios. The proposed merger is also expected to result in annual cost savings for the Thermax Group, thereby enhancing long-term shareholder value

Such consolidation of resources is also anticipated to convey stronger financial stability and valuation metrics, thereby presenting a more accurate picture of the Company’s financial strength and long-term prospects.</in-capmkt:RationaleForAmalgamationOrMerger><in-capmkt:NatureOfConsiderationForAmalgamationOrMerger contextRef="OneD">Others</in-capmkt:NatureOfConsiderationForAmalgamationOrMerger><in-capmkt:DetailsOfConsiderationForAmalgamationOrMerger contextRef="OneI">The entire issued, subscribed and paid-up share capital of the Transferor Company is held by the Transferee Company along with its nominees. Hence, the Transferor Company is directly and beneficially owned by the Transferee Company along with its nominees. Accordingly, the Transferor Company is a direct wholly-owned subsidiary of the Transferee Company. Further, the shares of the Transferor Company held by the Transferee Company directly, shall stand cancelled without any further act/instrument or deed</in-capmkt:DetailsOfConsiderationForAmalgamationOrMerger><in-capmkt:BriefDetailsOfChangeInShareholdingPatternOfListedEntityForAmalgamationOrMerger contextRef="OneI">There will be no change in the shareholding pattern of the Company pursuant to the Scheme, as no shares are being issued by the Transferee Company in connection with the Scheme.</in-capmkt:BriefDetailsOfChangeInShareholdingPatternOfListedEntityForAmalgamationOrMerger><in-capmkt:AnyOtherBriefSignificantInformationForAmalgamationOrMerger contextRef="OneI">NA</in-capmkt:AnyOtherBriefSignificantInformationForAmalgamationOrMerger></xbrli:xbrl>
