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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 I1+FuKq/Wqbs/Gu0UgN3RFekFSECNiz9bvPDIhKQjbSyLGIHgFcVdhOf/DTEIxPE
 iizxWWCWyzhaxI9v7B8uIw==

<SEC-DOCUMENT>0000930413-07-007967.txt : 20071016
<SEC-HEADER>0000930413-07-007967.hdr.sgml : 20071016
<ACCEPTANCE-DATETIME>20071016144945
ACCESSION NUMBER:		0000930413-07-007967
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20071011
FILED AS OF DATE:		20071016
DATE AS OF CHANGE:		20071016

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			FERRARO JOHN F
		CENTRAL INDEX KEY:			0000924116

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-10707
		FILM NUMBER:		071174044

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		8606832005

	MAIL ADDRESS:	
		STREET 1:		C/O THERMODYNETICS
		STREET 2:		651 DAY HILL ROAD
		CITY:			WINDSOR
		STATE:			CT
		ZIP:			06095

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			THERMODYNETICS INC
		CENTRAL INDEX KEY:			0000351902
		STANDARD INDUSTRIAL CLASSIFICATION:	MISCELLANEOUS FABRICATED METAL PRODUCTS [3490]
		IRS NUMBER:				061042505
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0331

	BUSINESS ADDRESS:	
		STREET 1:		651 DAY HILL RD
		STREET 2:		.
		CITY:			WINDSOR
		STATE:			CT
		ZIP:			06095
		BUSINESS PHONE:		2036832005

	MAIL ADDRESS:	
		STREET 1:		651 DAY HILL ROAD
		STREET 2:		.
		CITY:			WINDSOR
		STATE:			CT
		ZIP:			06095

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	THERMO KINETICS INC
		DATE OF NAME CHANGE:	19810607
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>c50697_ex.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2007-10-11</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000351902</issuerCik>
        <issuerName>THERMODYNETICS INC</issuerName>
        <issuerTradingSymbol>TDYT</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000924116</rptOwnerCik>
            <rptOwnerName>FERRARO JOHN F</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O THERMODYNETICS, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>651 DAY HILL ROAD</rptOwnerStreet2>
            <rptOwnerCity>WINDSOR</rptOwnerCity>
            <rptOwnerState>CT</rptOwnerState>
            <rptOwnerZipCode>06095</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>1</isOther>
            <officerTitle>Chairman &amp; Secretary</officerTitle>
            <otherText>Trustee-401(k) Plan of Issuer</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock, $.01 par value</value>
            </securityTitle>
            <transactionDate>
                <value>2007-10-11</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>25000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.75</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>94296</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Trust</value>
                    <footnoteId id="F1"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock, $.01 par value</value>
            </securityTitle>
            <transactionDate>
                <value>2007-10-11</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>10727</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.75</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>34734</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Trust</value>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock, $.01 par value</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>831341</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F3"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">The Reporting Person is a trustee of the Thermodynetics, Inc. 401(k) Employee Retirement Savings Plan.  The acquired shares
 (25,000 shares) for the Issuer's 401(k) Plan aggregate account reported herein have been issued to the Issuer's 401(k)
 Employee Retirement Savings Plan as a matching contribution made by the Issuer and are being held in trust for all qualified
 plan participants by the trustees of the Plan.  The information in the corresponding row of Table I relates solely to the
 aggregate 401(k) Plan holdings.</footnote>
        <footnote id="F2">The acquired shares (10,727 shares) for the Reporting Person's personal 401(k) account reported herein have been issued to
 the Issuer's 401(k) Plan as a matching contribution made by the Issuer and are being held in trust by the trustees of the
 Plan; the Reporting Person is a Trustee of the Plan.  The information in the corresponding row of Table I relates solely to
 the Reporting Person's personal 401(k) account.</footnote>
        <footnote id="F3">The information in the corresponding row of Table I reflects Reporting Person's aggregate holdings of the Issuer:  Includes
 the shares held in trust under the 401(k) Plan for the Reporting Person's personal 401(k) account only.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ John F. Ferraro</signatureName>
        <signatureDate>2007-10-11</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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