RNS Number:5817D
QuestAir Technologies Inc
25 May 2006


For Immediate Release                                             25 May, 2006



                     QuestAir announces shareholder dealing



VANCOUVER, B.C. - QuestAir Technologies Inc. (AIM: QAR; TSX: QAR) has been
notified that one of its early strategic investors has sold its holding in
QuestAir in trades made on 24 May 2006.



Ballard Power Systems Inc. ("Ballard") sold its entire holding of 2,775,175
common shares at an average price of $1.35 per common share. Ballard made its
first equity investment in QuestAir in 2000.



This announcement is made pursuant to the rules governing the operation of AIM
as established by the London Stock Exchange Plc.





About QuestAir Technologies Inc.

QuestAir Technologies, Inc. is a developer and supplier of proprietary gas
purification systems for several large international markets, including existing
markets such as oil refining, biogas production and natural gas processing, and
emerging markets such as fuel cell power plants and fuel cell vehicle refuelling
stations. The Company has joint development agreements with Exxon Mobil Research
and Engineering Company and Shell Hydrogen, and a collaboration with FuelCell
Energy. QuestAir is based in Burnaby, British Columbia and its shares trade on
the AIM Market of the London Stock Exchange Plc. and on the Toronto Stock
Exchange under the symbol "QAR".



Forward Looking Statements

Certain statements in this press release may constitute ''forward-looking''
statements which involve known and unknown risks, uncertainties and other
factors which may cause the actual results, performance or achievements of the
Company, or industry results, to be materially different from any future
results, performance or achievements expressed or implied by such
forward-looking statements. When used in this press release, such statements use
such words as "anticipate", "believe", "plan", "estimate", "expect", "intend", '
'may'', ''will'' and other similar terminology. These statements reflect current
expectations regarding future events and operating performance and speak only as
of the date of this press release. Forward-looking statements involve
significant risks and uncertainties, should not be read as guarantees of future
performance or results, and will not necessarily be accurate indications of
whether or not such results will be achieved. A number of factors could cause
actual results to differ materially from the results discussed in the
forward-looking statements.



Contact Information:


QuestAir Technologies Inc.
Andrew Hall
Director, Corporate Development and External Communications
Phone: (001) 604-453-6967
Email: hall@questairinc.com
www.questairinc.com

Canadian media contact:                             UK media contact:
Terry Foster                                        Charles Ryland
James Hoggan & Associates                           Ben Willey
Phone: (001) 604-739-7500                           Buchanan Communications
                                                    Phone: +44 207 466 5000







                      This information is provided by RNS
            The company news service from the London Stock Exchange
END

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