EXHIBIT 99.10
                             SECURED PROMISSORY NOTE

$925,000.00                                                     October 25, 2004


                                R E C I T A L S:

A.  The  undersigned  previously  executed  a  Secured  Promissory  Note  in the
principal amount of $1,000,000.00, dated May 9, 2003 (the "Original $1.0 Million
Note"),  in favor of FKA  Distributing  Co,  d/b/a  HoMedics,  inc.,  a Michigan
corporation ("Lender").

B. No funds were loaned by Lender under the Original $1.0 Million Note.

C. This Secured Promissory Note ("Note") replaces the Original $1.0 Million Note
and upon the execution of this Note by the undersigned,  Lender will destroy the
Original $1.0 Million Note.

NOW,  THEREFORE,  from the date of this  Note,  the  terms of  repayment  are as
follows:

FOR VALUE  RECEIVED,  the  undersigned,  Kronos Advanced  Technologies,  Inc., a
Nevada  corporation  ("Kronos")  and Kronos  Air  Technologies,  Inc.,  a Nevada
corporation,  promise to pay to the order of Lender, at the office of the Lender
in the  State  of  Michigan,  Nine  Hundred  Twenty  Five  Thousand  and  00/100
($925,000.00)  Dollars (U.S.) (or that portion of it advanced by Lender pursuant
to the terms of that  certain  First  Amendment  to Master  Loan and  Investment
Agreement of even date herewith  among the parties  ("Master Loan  Agreement")).
Interest  on the  unpaid  principal  balance  from the date  such  principal  is
outstanding  this Note shall accrue at the rate of 6% per annum until  maturity,
whether by acceleration or otherwise,  or until Default,  as later defined,  and
after that at a default rate equal to the rate of interest otherwise  prevailing
under this Note plus 3% per annum (but in no event in excess of the maximum rate
permitted by law).  Interest  shall be calculated  for the actual number of days
the principal  received by Kronos is  outstanding  on the basis of a 365/366 day
year.  No payments  shall be required  under this Note until the earlier of: (i)
the quarter following the Production  Effective Date (as such term is defined in
the  Exclusive  License  Agreement  dated  October 23, 2002  between  Lender and
Kronos, as amended);  or (ii) twenty-four (24) months from the date of this Note
(the "Repayment Start Date").  Interest accrued during such period shall, on the
Repayment Start Date,  become part of the principal  balance under this Note and
be included as  principal  for  purposes of  calculating  amortization.  Payment
installments  of principal and accrued  interest due under this Note shall begin
on the first day of the quarter  following the Repayment Start Date and continue
on the first day of each November,  February,  May and August until paid in full
over the remaining  period of this Note. The entire  remaining unpaid balance of
principal and accrued  interest shall be payable on the fifth (5th)  anniversary
of this Note. A late installment charge equal to 5% of each late installment may
be charged on any  installment  payment  not  received  by the Lender  within 10
calendar days after the  installment due date, but acceptance of payment of this
charge shall not waive any Default under this Note.

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This  Note  and  any  other  indebtedness  and  liabilities  of any  kind of the
undersigned to the Lender, and any and all modifications, renewals or extensions
of it, whether joint or several,  contingent or absolute,  now existing or later
arising, and however evidenced (collectively  "Indebtedness") are secured by and
the Lender is granted a security  interest in all  property  of the  undersigned
from time to time in the  possession of the Lender and by any other  collateral,
rights and properties described in each and every mortgage,  security agreement,
pledge, assignment and other security or collateral agreement which has been, or
will at any time(s) later be,  executed by the undersigned to or for the benefit
of the Lender (collectively "Collateral").

If the undersigned (a) fail to pay this Note or any of the Indebtedness when due
(after the expiration of the 30 day grace period as set forth in the Master Loan
Agreement), by maturity, acceleration or otherwise; or (b) fail to comply (after
the  expiration  of the 30 day  grace  period as set  forth in the  Master  Loan
Agreement)  with any of the terms or  provisions  of any  agreement  between the
undersigned  and the  Lender;  or (c)  become  the  subject  of a  voluntary  or
involuntary  proceeding  in  bankruptcy,  or a  reorganization,  arrangement  or
creditor  composition  proceeding,  ceases  doing  business as a going  concern,
dissolves or, is the subject of a dissolution,  merger or consolidation;  or (d)
if any warranty or  representation  made by the  undersigned in connection  with
this  Note  or any of the  Indebtedness  shall  be  discovered  to be  false  or
misleading in any material respect;  (e) or if there is any termination,  notice
of  termination,  or breach of any guaranty,  pledge,  collateral  assignment or
subordination agreement relating to all or any part of the Indebtedness;  or (f)
if there is any failure by the undersigned to pay when due (after the expiration
of the 30 day grace period as set forth in the Master Loan Agreement) any of its
indebtedness  (other  than  to  the  Lender)  in  excess  of  $25,000  or in the
observance  or  performance  of any term,  covenant or condition in any document
evidencing,  securing or relating to such indebtedness; or (g) if there is filed
or issued a levy or writ of  attachment  or  garnishment  or other like judicial
process upon the undersigned or any of the Collateral, then the Lender, upon the
occurrence of any of these events (each a "Default"),  may at its option declare
any or all of the  Indebtedness  to be  immediately  due  and  payable,  sell or
liquidate all or any portion of the Collateral, set off against the Indebtedness
any  amounts  owing by the Lender to the  undersigned,  charge  interest  at the
default rate provided in the document  evidencing the relevant  Indebtedness and
exercise any one or more of the rights and remedies granted to the Lender by any
agreement with the undersigned or given to it under applicable law. All payments
under this Note shall be in immediately  available United States funds,  without
setoff or counterclaim.

This Note shall bind the undersigned, its successors and assigns.

The undersigned waive presentment,  demand, protest, notice of dishonor,  notice
of demand or intent to demand,  notice of  acceleration or intent to accelerate,
and all  other  notices,  and  agree  that no  extension  or  indulgence  to the
undersigned or release shall affect the obligations of any of the undersigned.

The undersigned  agree to reimburse the holder or owner of this Note for any and
all costs and expenses (including without limit, court costs, legal expenses and
reasonable  attorney fees, whether inside or outside counsel is used, whether or

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not suit is instituted  and, if suit is  instituted,  whether at the trial court
level, appellate level, in a bankruptcy, probate or administrative proceeding or
otherwise) incurred in collecting or attempting to collect this Note or incurred
in any other matter or proceeding relating to this Note.

The  undersigned  acknowledge  and agree that there are no contrary  agreements,
oral or written,  establishing a term of this Note and agrees that the terms and
conditions of this Note may not be amended, waived or modified except in a
writing  signed by an officer of the Lender  expressly  stating that the writing
constitutes an amendment,  waiver or  modification of the terms of this Note. As
used in this Note, the word "undersigned" means each maker signing this Note. If
any provision of this Note is unenforceable in whole or part for any reason, the
remaining provisions shall continue to be effective. THIS NOTE SHALL BE GOVERNED
BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF MICHIGAN.

THE UNDERSIGNED AND THE LENDER  ACKNOWLEDGE THAT THE RIGHT TO TRIAL BY JURY IS A
CONSTITUTIONAL  ONE, BUT THAT IT MAY BE WAIVED. EACH PARTY, AFTER CONSULTING (OR
HAVING HAD THE  OPPORTUNITY TO CONSULT) WITH COUNSEL OF THEIR CHOICE,  KNOWINGLY
AND VOLUNTARILY, AND FOR THEIR MUTUAL BENEFIT, WAIVES ANY RIGHT TO TRIAL BY JURY
IN THE EVENT OF LITIGATION  REGARDING THE  PERFORMANCE OR ENFORCEMENT  OF, OR IN
ANY WAY RELATED TO, THIS NOTE OR THE INDEBTEDNESS.


                             KRONOS ADVANCED TECHNOLOGIES, INC.,
                             a Nevada corporation


                             By:______________________________________

                             Name:____________________________________

                             Its:_____________________________________


                             KRONOS AIR TECHNOLOGIES, INC.,
                             a Nevada corporation


                             By:______________________________________

                             Name:____________________________________

                             Its:_____________________________________


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