QAR Questair Tech

    FOR:  QUESTAIR TECHNOLOGIES INC.

TSX, AIM SYMBOL:  QAR

April 24, 2008

QuestAir to Supply Methane Purifier for 'Biomethane for Vehicle Fuel' Project in California

VANCOUVER, BRITISH COLUMBIA--(Marketwire - April 24, 2008) - QuestAir Technologies Inc. (TSX:QAR)(AIM: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".

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

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 Communications
Stephen Burega
Canadian Media Contact
(604) 623-3007

OR

Canaccord Adams
Robert Finlay
+44 (0) 207 050 6500


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QuestAir Technologies Inc.



                                                                

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