QuestAir to Supply Methane Recovery System for New Hampshire Landfill Gas-To-Energy Project

    FOR:  QUESTAIR TECHNOLOGIES INC.

TSX, AIM SYMBOL:  QAR

September 4, 2007

QuestAir to Supply Methane Recovery System for New Hampshire Landfill Gas-To-Energy Project

VANCOUVER, BRITISH COLUMBIA--(Marketwire - Sept. 4, 2007) - QuestAir Technologies Inc.
(TSX:QAR)(AIM:QAR) announced today that it has received an order valued at approximately CDN$1.2
million for a M-3100 methane recovery system for use in a landfill gas-to-energy project in New
Hampshire. The order was received from SCS Energy, a division of SCS Engineers, a leader in the
design, construction and operation of landfill gas-to-energy projects in the US.

Jonathan Wilkinson, President and CEO of QuestAir, said, "QuestAir's M-3100 will increase the energy
content of landfill gas from the Rochester Neck Road landfill by removing carbon dioxide. The upgraded
product gas will be used to fire a combined cycle cogeneration facility at the University of New
Hampshire ("UNH"), generating both electrical power and steam for building heating."

"The University of New Hampshire is a leader in sustainability and the use of renewable energy. The
system supplied by SCS Energy, including QuestAir's M-3100, will allow UNH to replace fossil fuels
with renewable upgraded landfill gas in their existing cogeneration facility, which provides 75% of
the university's energy requirements."

"This is expected to result in significant environmental and economic benefits, including a direct
reduction in greenhouse gas emissions, as well as substantial cost savings from lower natural gas
consumption," Wilkinson said.

Jeffrey Pierce, Vice President of SCS Energy, said, "SCS selected a QuestAir M-3100 PSA system for the
UNH project because its rotary valve provides a significant improvement in PSA design. Also, the M-
3100's small size, attractive economics, and simplicity of operation provide a good solution for a
stable, enhanced BTU fuel gas to fire UNH's 8 MW turbine."

About the QuestAir M-3100

QuestAir's M-3100 purifies methane-containing gas streams such as landfill gas and anaerobic digester
gas to high purity methane, suitable for supplementing existing natural gas supplies. QuestAir's PSA
process and proprietary rotary valve technology deliver higher efficiency than conventional PSA
systems in a more compact, cost-effective package. QuestAir's M-3100 system can upgrade up to 9
million 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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QuestAir Technologies Inc.
Sherry Tryssenaar
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Email: [e-mail]
Website: www.questairinc.com

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Ben Willey
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Stephen Burega
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QuestAir Technologies Inc.