FOR:  QUESTAIR TECHNOLOGIES INC.

TSX, AIM SYMBOL:  QAR

March 4, 2008

QuestAir Announces New Agreement with Exxon Mobil Research and Engineering

VANCOUVER, BRITISH COLUMBIA--(Marketwire - March 4, 2008) - QuestAir Technologies Inc. ("QuestAir" or the
"Company") (TSX:QAR)(AIM:QAR) announced today that it has signed an agreement valued at $6.3 million with
ExxonMobil Research and Engineering ("EMRE") to allow for the further development and commercialization of
QuestAir's rapid-cycle pressure swing adsorption ("PSA") technology.

The agreement announced today builds on the rapid cycle development programs that the parties have conducted
over the past 4 years, and on the successful testing of the prototype H-6200 hydrogen purifier at an ExxonMobil
refinery in France. The H-6200 has been operating at the refinery since October 2007 and has performed well
through the test period. Once testing has been completed, the unit will be utilized in commercial service at
the refinery.

Under the agreement, EMRE will pay QuestAir $6.3 million over two years in order to advance the
commercialization of the H-6200 hydrogen purifier, and progress development in the field of on-board reforming
of liquid hydrocarbon fuels to hydrogen for mobile fuel cell applications.

Jonathan Wilkinson, President and CEO of QuestAir said, "This agreement represents the next step in the
progression of QuestAir's relationship with EMRE and in the further evolution of QuestAir's rapid cycle PSA
technology. The agreement announced today reflects the success that has been achieved to date and the desire of
both parties to pursue broader applications of the rapid cycle technology in the future."

Commenting on commercialization of the H-6200, Wilkinson said, "With the success of the prototype test in
France, the parties have reached the stage that they can take the H-6200 hydrogen purifier to the refinery
market. The results of the test to date position this product well for future sales. We believe that the H-6200
will provide refinery customers with significant benefits compared to conventional pressure swing adsorption,
including lower total erected costs, superior recovery performance and improved operability."

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.
Sherry Tryssenaar
Chief Financial Officer
(604) 453-6902
Email: tryssenaar@questairinc.com
Website: www.questairinc.com

OR

Canaccord Adams
Robert Finlay
+44 207 050 6500

OR

Buchanan Communications
Charles Ryland
UK Media Contact
+44 (0) 20 7466 5000

OR

Buchanan Communications
Ben Willey
UK Media Contact
+44 (0) 20 7466 5000

OR

Karyo Communications
Stephen Burega
Canadian Media Contact
(604) 648-6236

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