QAR Questair Tech

    FOR:  QUESTAIR TECHNOLOGIES INC.

TSX, AIM SYMBOL:  QAR

May 30, 2008

QuestAir to Supply Hydrogen Purifier to Hydro-Chem for New Hydrogen Plant in Mexico

VANCOUVER, BRITISH COLUMBIA--(Marketwire - May 30, 2008) - QuestAir Technologies Inc.
(TSX:QAR)(AIM:QAR) announced today that it will supply an H-3200 hydrogen purifier for use in a new
hydrogen plant to be constructed in Mexico by Hydro-Chem, a world leading supplier of hydrogen plants.

Hydro-Chem will integrate the H-3200 pressure swing adsorption ("PSA") system into an on-site hydrogen
plant purchased by a leading industrial gas company in Mexico. The new hydrogen plant will supply
hydrogen to a new steel plant being constructed by POSCO in Mexico, as well as supplying compressed
hydrogen in tube trailers for other hydrogen users in the area.

"This is an important order for QuestAir for a number of reasons," said Jonathan Wilkinson, President
and CEO of QuestAir. "POSCO, the end user of the hydrogen, is a major steel company and hydrogen
purification for new and existing steel plants is an important growth market for QuestAir. In
addition, this is our fourth PSA purchased by Hydro-Chem, and another important step towards our goal
of having QuestAir's rotary valve PSA become the industry standard for hydrogen plants with capacities
less than 15,000 cubic meters per hour."

About QuestAir H-3200

QuestAir's H-3200 purifies hydrogen-containing gas streams to high purity hydrogen for use in
industrial processes, on-site hydrogen plants and hydrogen fueling stations. The H-3200's optimized
Pressure Swing Adsorption ("PSA") process and proprietary rotary valve technology deliver higher
efficiency than conventional PSA systems in a more compact, cost effective package. Since the product
launch in 2003, QuestAir has sold more than 45 H-3200 systems to customers in Europe, Japan and North
America.

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 Hydro-Chem

Hydro-Chem specializes in the design, engineering and construction of modular hydrogen plants. Hydro-
Chem has supplied over 140 hydrogen plants to key clients in the food, steel, glass and petrochemical
industries since 1975.

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 Edelman
Stephen Burega
Canadian media contact
(604) 623-3007 or Cellular: (604) 506-3734



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QuestAir Technologies Inc.



                                                                

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