For Immediate Release 30 May 2008

QuestAir to supply hydrogen purifier to Hydro-Chem for new hydrogen plant in Mexico

VANCOUVER, B.C. – QuestAir Technologies Inc. (AIM: QAR; TSX: 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.

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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