QuestAir Signs Supply Agreement With Verdesis Suisse SA for European Biogas Market

    FOR:  QUESTAIR TECHNOLOGIES INC.

TSX, AIM SYMBOL:  QAR

March 11, 2008

QuestAir Signs Supply Agreement With Verdesis Suisse SA for European Biogas Market

VANCOUVER, BRITISH COLUMBIA--(Marketwire - March 11, 2008) - QuestAir Technologies Inc. (TSX:QAR)(AIM:QAR)
announced today that it has signed an agreement to supply its methane purification products to Verdesis Suisse
SA ("Verdesis"), a leading European supplier of integrated plants that produce renewable pipeline or vehicle
fuel grade methane from biogas. The agreement, which has an initial term of four years, is non-exclusive in
Europe but has special provisions in Switzerland.

Under the terms of the supply agreement, QuestAir's methane pressure swing adsorption ("PSA") systems will be
integrated into Verdesis's biogas enrichment plants, which are supplied to developers and owners of projects
that produce biogas from agricultural and municipal wastes or to gas utilities operating natural gas grids. To
date, QuestAir has announced contracts to supply its M-3200 PSA to four Verdesis projects in Switzerland which
upgrade biogas for injection into the natural gas grid.

Jonathan Wilkinson, President and CEO of QuestAir, said, "This partnership is an important part of our strategy
to expand our presence in the European biogas market. Verdesis is a leader in the supply of packaged smaller-
capacity biogas enrichment plants, suitable for projects on farms, organic waste digesters and waste-water
treatment plants."

"Verdesis is expanding its market presence in both Germany and Austria, and given the recent subsidies that
have been implemented in these markets for the production of pipeline-grade methane from biogas, we expect that
these markets will be key growth markets for QuestAir," Wilkinson said.

Beat Naf, President and CEO of Verdesis, said, "The performance of QuestAir's PSA at our Widnau biogas
upgrading plant has fully met our expectations, both in terms of fast start-up and operating performance. The
compact design and optimized performance of QuestAir's PSA is an excellent fit with our containerized biogas
upgrading plants, and the supply agreement announced today is an important part of Verdesis's growth strategy."

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".

About Verdesis Suisse SA

Verdesis Suisse SA designs and supplies turn-key plants for upgrading and utilization of biogas, sewage gas and
landfill gas. Cleaning of biogas, the combustion of low caloric methane gases in microturbines, and biomethane
plants, and upgrading biogas to natural gas quality, are the core competencies of Verdesis Suisse SA. The
company is headquartered in Aarau, Switzerland. Through distribution partners Verdesis Suisse SA is also active
in Austria, Spain and Portugal. In May 2008, a subsidiary in Germany will be established.

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.



-30-

FOR FURTHER INFORMATION PLEASE CONTACT:

QuestAir Technologies Inc.
Sherry Tryssenaar
Chief Financial Officer
[phone]
Email: [e-mail]
Website: www.questairinc.com

OR

Canaccord Adams
Robert Finlay
[phone]

OR

Buchanan Communications
Charles Ryland
UK Media Contact
[phone]

OR

Buchanan Communications
Ben Willey
UK Media Contact
[phone]

OR

Karyo Communications
Stephen Burega
Canadian Media Contact
[phone]


-0-

								
QuestAir Technologies Inc.