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)                May 10, 2005
                                                  ------------------------------



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



   Delaware                          0-10707                  06-1042505
[State or other jurisdiction    (Commission File No        (I.R.S. Employer
of incorporation)                                            Identification No.)

   651 Day Hill Road, Windsor, Connecticut                    06095
- --------------------------------------------------------------------------------
  (Address of principal executive offices)                 (Zip Code)



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


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

Check  the  appropriate  box  below  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):

[_]  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 1.01 Entry into a Material Definitive Agreement.

As of May  9,  2005,  the  Board  of  Directors  approved  the  issuance  of 10%
promissory  notes in the  aggregate  amount  of up to  $600,000,  as well as the
issuance of warrants to purchase common stock,  all to be purchased  pursuant to
subscription agreements. Two affiliated  officer/directors and four unaffiliated
investors  entered into  subscription  agreements  with the Company,  which were
accepted  and  closed  on  May  10,  2005,   whereby   $150,000  and   $300,000,
respectively,  $450,000  in the  aggregate,  was  borrowed by the Company at the
first closing; such offering is continuing to a maximum of up to $600,000.  Such
loans are evidenced by promissory notes bearing 10% interest,  and payment terms
as follows:  (a) interest shall be payable monthly in arrears commencing on June
15, 2005; and (b) seven (7) monthly payments of sixty-four  thousand two hundred
eighty-five 71/100  ($64,285.71)  dollars of principal in the aggregate together
with  accrued and unpaid  interest  commencing  June 15,  2006,  and maturing on
December 31, 2006.  Further,  the  investors  each receive  warrants to purchase
common stock at an exercise price of $1.40 per share.  The warrants  expire June
30, 2008,  and provide for the purchase of 225,000 shares of common stock in the
aggregate.




                                   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 A. Lerman
   -------------------------------------
      Robert A. Lerman, President

Date: May 10, 2005