EXHIBIT 10.15

                                   CHASE-ROYER

                             COMMERCIAL TRANSACTION

                                      1997



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                    CONVEYANCE OF ALTERNATIVE REFRIGERATION,

                      COOLING AND AIR PURIFICATION SYSTEMS

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We, Rudolph L. Chase, P.O. Box 10 - Main Street, Craftsbury,  Vermont USA 05826,
and  Raymond  C.  Chase,  RR1 - Box 14,  Craftsbury,  Vermont,  USA  05826,  for
financial  and other  consideration  received on this date,  said  consideration
recognized  and  acknowledged  by us as being full,  adequate and  complete,  do
hereby  voluntarily and knowingly execute this legal instrument with the express
intention of effecting the absolute,  full and forever release,  relinquishment,
transfer  and  conveyance  to Clement H.  Royer,  358 Phaeton  Street,  Windsor,
Connecticut,  USA 06095, of any and all equitable rights,  titles and interests,
and any and all other rights, titles, patents and interests, of any kind or sort
whatsoever,  related to or connected in any way, shape or form, to the business,
pursuit  or  commercial  enterprise  of  developing,  refining,   manufacturing,
marketing  and/or  profiting  from any and all  alternative  energy  systems and
functions, and specifically,  any and all systems,  processes and functions that
utilize  atmospheric air to cool,  refrigerate  and/or purify  enclosures,  said
herein-referenced  rights, titles, patents and interests held by us individually
and/or held by Natural Cool, Inc., a Vermont  corporation,  and/or Natural Cool,
Ltd., a Connecticut corporation,  two separate entities of which we are the sole
possessors and  stockholders,  and each corporate entity is being conveyed by us
in its entirety to Clement H. Royer,  along with any and all of our residual and
remaining attendant private interests.

All manner of personal and corporate  rights,  titles and  interests  referenced
herein  and  ever  possessed  and  enjoyed  by us in and to any  and  all of the
property,  patents,  proprietary  processes  and  knowledge,  and  any  and  all
commercial  activity  and  matter  referenced  herein,  are  conveyed  fully and
completely to Clement H. Royer of 358 Phaeton Street,  Windsor Connecticut,  USA
06095.

This legal instrument incorporates by reference the full and unfettered right to
exploit and  commercially  profit from the  unrestricted  use and application of
U.S.  Patent  Number  5,144,816,  as evidenced and issued to Rudolph L. Chase on
September 8, 1992, and herein conveyed and assigned to Clement H. Royer.

We,  Rudolph L. Chase and Raymond C. Chase,  warrant that we will fully  defend,
protect indemnify and save harmless Clement H. Royer, his successors,  heirs and
assigns,  from any and all adverse  claims that may be made by any party against
said legal title herein conveyed.

We unequivocally and without  reservation  intend this legal instrument to fully
and completely bind us, our heirs, our legal representatives and all assigns.
<PAGE>
For  consideration  paid to us on this  date,  we  further  agree  to not act to
circumvent,  by any  direct or  indirect  means,  the  letter and spirit of this
conveyance.  We  agree  to  refrain,  cease  and  desist  from  any  discussion,
dissemination or disclosure of any' information,  knowledge or matter related in
any way to the business and commercial  activity  referenced  herein and further
related to the entire body of rights and interests conveyed by us on this date.

IN WITNESS  WHEREOF,  this legal instrument is affirmed and executed on March 1,
1997, by our free acts and deeds.


/s/ Rudolph L. Chase
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Rudolph L. Chase


/s/ Rudolph L. Chase
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Natural Cool, Ltd.
Rudolph L. Chase, its President


/s/ Rudolph L. Chase
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Natural Cool, Inc.
Rudolph L. Chase, its President


THIS COMMERCIAL CONVEYANCE HAS BEEN ACCEPTED AND ASSENTED TO IN ITS ENTIRETY BY:

/s/ Clement H. Royer
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Clement H. Royer

3/1/97
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Date