For Immediate Release 9 June, 2005

The agreement is the culmination of 4 years of cooperation between QuestAir and MKK, during which QuestAir supplied MKK with four PSA systems for various projects in Japan, including HyQuestor® PSA systems installed at a steel mill operated by Stainless Kuze Co. Ltd in Hakui, and the Senju hydrogen fueling station in Tokyo. These systems have accumulated over 24,000 hours of operation since installation.

Jonathan Wilkinson, President and CEO of QuestAir, said that QuestAir has built a strong relationship with MKK over the past four years. "We are very pleased to formalize our relationship with MKK though this supply agreement. MKK is the largest supplier of hydrogen plants in Japan, with over 90 plants installed to date, and we expect that MKK's strong customer relationships and distribution channels will expand QuestAir's access to high growth hydrogen markets in Japan, China and other parts of Asia," Wilkinson said.

Mr. Kunio Yabuki, Managing Director/General Manager, Sales Division of MKK, said, "QuestAir's compact, high efficiency hydrogen purification systems offer a clear advantage over competing products, and the performance and reliability of QuestAir's PSA products have exceeded our expectations. We look forward to incorporating QuestAir's line of products into MKK's hydrogen generation plants for industrial and fuel cell applications."

QuestAir's gas purification technology is based on its proprietary innovations in pressure swing adsorption (PSA) technology that solve some of the inherent disadvantages of conventional PSA. Conventional PSA technology was introduced commercially in the 1960s and today is applied extensively in the production and purification of hydrogen, oxygen and nitrogen for industrial uses. QuestAir's fast-cycle PSA technology operates at significantly higher cycle speeds than conventional PSA, resulting in a direct reduction in the size of equipment required to purify a given volume of product gas. Since entering the Japanese market in 2001, QuestAir has sold 8 PSA systems to Japanese customers, for use in industrial applications and hydrogen fueling demonstrations.

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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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 refuelling stations. The Company has joint development agreements with Exxon Mobil Research and Engineering Company and Shell Hydrogen, and a collaboration with FuelCell Energy. 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 Mitsubishi Kakoki Kaisha, Ltd.
Mitsubishi Kakoki Kaisha, Ltd. ("MKK") was established in 1935 to meet a need for chemical machinery manufactured domestically in Japan. MKK has grown steadily as an all-round engineering company providing a wide variety of chemical plants and machinery in various fields, including fertilizers, dyes, mining, gas, synthetic fibers, steel, petrochemicals, semiconductors, electronics, nuclear power, food, and medicine. MKK has been a pioneer in the development of the hydrogen generation technology, and has delivered 68 large-scale hydrogen product plants (capacity: 1000 m3/hr) and 17 mid-scale hydrogen product plants (capacity: 100-1000 m3/hr) since 1963. In 1988 MKK also developed a small-scale, energy-saving and low-price hydrogen product plant (capacity: up to 100 m3/hr) together with Tokyo Gas Group, and has delivered 14 plants. MKK is a public company based in Kawasaki, Japan.

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