For Immediate Release 24 April 2008

QuestAir to supply methane purifier for ‘Biomethane for Vehicle Fuel’ project in California

VANCOUVER, B.C. – QuestAir Technologies Inc. (AIM: QAR; TSX: QAR) announced today that it will supply an M-3200 pressure swing adsorption (“PSA”) system to the ‘Biomethane for Vehicle Fuel’ project located at the Hilarides Dairy in Lindsay, California.

Phase 3 Renewables LLC (“Phase 3”) will integrate QuestAir’s PSA into a plant that upgrades a portion of the biogas generated from the anaerobic digestion of manure at the 9,000-cow dairy in California. Purified biomethane from the Phase 3 plant will fuel three heavy-duty milk trucks that have been outfitted with engines to run on biomethane fuel. The project, which is partly funded by the US Environmental Protection Agency (EPA), is expected to be operational by the fall of 2008.

Jonathan Wilkinson, President and CEO of QuestAir Technologies said, “We are very pleased to be part of this project, the first commercial scale plant in North America to produce renewable biomethane vehicle fuel from agricultural waste.”

“California has the largest dairy herd in the US, producing nearly 30,000 tons of manure annually. This project demonstrates that this waste can be economically converted to renewable transportation fuel, reducing air and water pollution from manure, while also reducing emissions by replacing diesel trucks that service the industry.”

Norma McDonald, Owner and Operating Manager of Phase 3 said, “This project continues our efforts to expand the markets for farm-based biogas production.  At today’s prices, the plant will produce more than $1 million worth of fuel.  We’ve integrated QuestAir’s low-maintenance unit into a system that allows the farm to obtain substantial cost savings versus diesel fuel, while reducing operations and maintenance costs per vehicle.”

About QuestAir M-3200
QuestAir’s M-3200 purifies methane-containing gas streams such as anaerobic digester gas and landfill gas to high purity methane, suitable for supplementing existing natural gas supplies. The M-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. QuestAir’s M-3200 system can upgrade up to 250,000 cubic feet of biogas per day.

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”.

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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