EXHIBIT 99.3

                             SECURED PROMISSORY NOTE

$1,000,000.00                                                        May 9, 2003


FOR VALUE  RECEIVED,  the  undersigned,  Kronos Advanced  Technologies,  Inc., a
Nevada  corporation  ("Borrower")  and Kronos Air  Technologies,  Inc., a Nevada
corporation, promise to pay to the order of FKA Distributing Co. d/b/a HoMedics,
Inc.,  a  Michigan  corporation  ("Lender"),  at the office of the Lender in the
State of Michigan, One Million and 00/100 ($1,000,000.00)  Dollars (U.S.) as set
forth  herein.  Interest on the unpaid  principal  balance from the date of 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 is  outstanding  on the basis of a 365/366 day year. No payments shall
be required under this Note until August 1, 2004 [the first payment date of that
certain Secured  Promissory Note in the amount of $2,400,000,  dated May 8, 2003
executed  by  Borrower in favor of Lender  (the  "$2,400,000  Note")].  Interest
accrued  during such period  shall become part of the  principal  balance of the
Note  and  shall  be  included  as  principal   for   purposes  of   calculating
amortization.  Payment  installments of principal and accrued interest due under
this Note shall begin on August 1, 2004 and  continuing 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 the $2,400,000 Note.
If this Note is issued on or after the first  anniversary date of the $2,400,000
Note,  payments shall be made in equal quarterly  installments  beginning on the
first  day of the  first  quarter  month  (August,  November,  February  or May)
immediately  following  the issue  date,  and  continuing  until the fifth (5th)
anniversary of the  $2,400,000  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.

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 that certain
Master  Loan and  Investment  Agreement  dated  May 8, 2003  among  the  parties
("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


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Master Loan  Agreement)  with any of the terms or  provisions  of any  agreement
between the undersigned and the Lender;  or (c) become  insolvent or 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
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.

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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: /s/ Daniel R. Dwight
                                  --------------------------------------
                              Name:   Daniel R. Dwight
                              Its:    President and CEO


                              KRONOS AIR TECHNOLOGIES, INC.,
                              A NEVADA CORPORATION


                              By: /s/ Daniel R. Dwight
                                  --------------------------------------
                              Name:   Daniel R. Dwight
                              Its:    President and CEO

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