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<!--CTW V1.0 (26-06-2026)-->
<xbrli:xbrl xmlns:in-capmkt="https://www.sebi.gov.in/xbrl/2023-06-30/in-capmkt" xmlns:in-capmkt-ent="https://www.sebi.gov.in/xbrl/Closure_Of_Trading_Window/2023-06-30/in-capmkt/in-capmkt-ent" xmlns:in-capmkt-roles="https://www.sebi.gov.in/xbrl/Closure_Of_Trading_Window/2023-06-30/in-capmkt-roles" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric" xmlns:in-capmkt-type="https://www.sebi.gov.in/xbrl/2023-06-30/in-capmkt-types" 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-2023-06-30.xsd"/><xbrli:context id="MainI"><xbrli:entity><xbrli:identifier scheme="https://www.sebi.gov.in/in-capmkt/NSESymbol">UHTL</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:instant>2026-08-23</xbrli:instant></xbrli:period></xbrli:context><in-capmkt:NameOfTheCompany contextRef="MainI">United Heat Transfer Limited</in-capmkt:NameOfTheCompany><in-capmkt:NSESymbol contextRef="MainI">UHTL</in-capmkt:NSESymbol><in-capmkt:ISIN contextRef="MainI">INE0SMR01011</in-capmkt:ISIN><in-capmkt:TypeOfAnnouncementForClosureOfTradingWindow contextRef="MainI">New</in-capmkt:TypeOfAnnouncementForClosureOfTradingWindow><in-capmkt:TypeOfEventForClosureOfTradingWindow contextRef="MainI">Closure of Trading Window</in-capmkt:TypeOfEventForClosureOfTradingWindow><in-capmkt:DateOfStartOfTradingWindowClosure contextRef="MainI">2026-08-24</in-capmkt:DateOfStartOfTradingWindowClosure><in-capmkt:DateOfEndOfTradingWindowClosure contextRef="MainI">2026-08-28</in-capmkt:DateOfEndOfTradingWindowClosure><in-capmkt:BriefDetailsForTradingWindowClosureEndDate contextRef="MainI">We hereby inform you that pursuant to terms of Company’s Code for prevention of Insider Trading framed under SEBI (Prohibition of Insider Trading) Regulations, 2015, the trading window (i.e. the period to deal in the Company's securities) for insiders/Designated Persons and their immediate relatives would remain close from Monday, 24th August, 2026 till the completion of 48 hours, in connection with the Board Meeting scheduled to be held on Wednesday, 26th August, 2026, inter alia, to consider and approve the proposal for issuance of equity shares or other securities on a preferential basis, private placement basis, or through such other permissible modes as may be decided by the Board, subject to the requisite approvals.</in-capmkt:BriefDetailsForTradingWindowClosureEndDate><in-capmkt:PurposeOfTheClosureOfTradingWindow contextRef="MainI">Fund raising</in-capmkt:PurposeOfTheClosureOfTradingWindow><in-capmkt:DateOfReport contextRef="MainI">2026-08-23</in-capmkt:DateOfReport></xbrli:xbrl>