U.S. SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 8-K

                     PURSUANT TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934


Date of Report (Date of earliest event reported)              August 19, 2005
                                                  ------------------------------

                              THERMODYNETICS, INC.
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             (Exact name of registrant as specified in its charter)

         Delaware                   0-10707                  06-1042505
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[State or other jurisdiction    (Commission File No.)       (I.R.S. Employer
of incorporation)                                            Identification No.)
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   651 Day Hill Road, Windsor, Connecticut                         06095
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  (Address of principal executive offices)                        (Zip Code)


                                  860-683-2005
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                         (Registrant's telephone number)

                                      N/A
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         (Former name or former address, if changed since last report.)


Check the appropriate  box if the Form 8-K filing is intended to  simultaneously
satisfy  the filing  obligation  of the  registrant  under any of the  following
provisions (see General Instruction A.2. below):


[_] Written communications pursuant to Rule 425 under the Securities Act
    (17 CFR 230.425)

[_] Soliciting material pursuant to Rule 14a-12 under the Exchange Act
    (17 CFR 240.14a-12)

[_] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange
    Act (17 CFR 240.14d-2(b))

[_] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange
    Act (17 CFR 240.13e-4(c))






Item 8.01.  Other Events.

Attached  hereto as Exhibit  99.1 and  incorporated  by  reference  herein is an
announcement  with respect to a new $3 million  order for the Company to provide
enhanced surface stainless steel tubing for commercial  boiler  applications  as
presented in a press release of August 19, 2005.


Section 9 - Financial Statements and Exhibits

Item 9.01.            Financial Statements and Exhibits.

          (c)         Exhibits.

Exhibit
Number                Description of Exhibits
- ------- ---------------------------------------------------------------------
  99.                 Press Release issued by the Company on August 19, 2005





                                   SIGNATURES






         Pursuant to the  requirements  of the Securities  Exchange Act of 1934,
the  registrant  has duly  caused  this report to be signed on its behalf by the
undersigned, hereunto duly authorized.


(Registrant)
THERMODYNETICS, INC.



By:  /s/Robert I. Lieberman
   --------------------------------
     Robert I. Lieberman, Treasurer

Date: August 23, 2005


TDYN 8-K 2005 (8K TDYT 08-23-05)