FOR:  QUESTAIR TECHNOLOGIES INC.

TSX, AIM SYMBOL:  QAR

June 1, 2007

QuestAir Announces Shipment of Refinery Hydrogen Purifier

BURNABY, BRITISH COLUMBIA--(CCNMatthews - June 1, 2007) - QuestAir Technologies Inc. ("QuestAir" or
"the Company") (TSX:QAR)(AIM:QAR) announced today that the first H-6200 hydrogen purifier has been
shipped to an ExxonMobil refinery located in France.

Jonathan Wilkinson, President and CEO of QuestAir, said that the system will be installed and then
tested during the remainder of 2007. Following this test period the unit will remain at the refinery
and be utilized in ongoing commercial operations. "The shipment of the first H-6200 system is a
significant milestone towards the commercialization of the novel hydrogen purifier that QuestAir and
ExxonMobil Research and Engineering Company ("EMRE") have been developing since 2003. The system will
be tested under a range of operating conditions that we expect to encounter at future customer sites.
We expect that the hydrogen purifier will be available on a commercial basis once the test is
underway."

QuestAir has been working with EMRE since 2003 to develop this advanced, rapid cycle pressure swing
adsorption ("RCPSA") system, marketed as the H-6200, for use in oil refineries and petrochemical
plants. This product will offer significant advantages relative to other hydrogen recovery options
including significantly lower total erected costs; superior recovery performance and improved
operability, allowing refinery operators to increase refinery productivity and profitability.

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 refueling stations. 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.


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FOR FURTHER INFORMATION PLEASE CONTACT:

QuestAir Technologies Inc.
Jonathan Wilkinson
President and Chief Executive Officer
(604) 453-6937
Email: wilkinson@questairinc.com
Website: www.questairinc.com

OR

Buchanan Communications
Charles Ryland/Ben Willey
UK media contact
+44 (0) 20 7466 5000

OR

Karyo Edelman
Glen Edwards
Canadian media contact
(604) 623-3007 or Cellular: (604) 561-4640

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