FOR:  QUESTAIR TECHNOLOGIES INC.

TSX, AIM SYMBOL:  QAR

March 12, 2007

QuestAir to Supply Second System to Recover Methane From Biogas in Switzerland

VANCOUVER, BRITISH COLUMBIA--(CCNMatthews - March 12, 2007) - QuestAir Technologies Inc.
(TSX:QAR)(AIM:QAR) announced today that it has received an order for a second M-3200 PSA system to
recover pipeline grade methane from biogas generated by an anaerobic digester in Switzerland.

Jonathan Wilkinson, President and CEO of QuestAir said that Verdesis Suisse SA has purchased
QuestAir's system as part of a plant that will recover so-called 'biomethane' from biogas generated by
the anaerobic digestion of agricultural and organic wastes at a site in Widnau, Switzerland.

"The Swiss Government has provided strong support for locally-sourced renewable energy through
initiatives such as the 'Klimarappen' or 'climate cent' funding program, as well as direct tax breaks
for Swiss utilities that supplement imported gas with locally-sourced biomethane."

"This government support, and the attractive economics of QuestAir's methane purification technology,
has created strong pull for projects such as Widnau that convert agricultural waste into renewable
biomethane fuel," Wilkinson said.

Roger Schneider, Director of GRAVAG Erdgas AG said, "PSA is a proven, reliable technology. The rotary
valve concept of QuestAir is innovative, convincing and state of the art. Emphasis is further given to
the ecological impact - the concept of Verdesis Suisse SA with an integrated Flox burner for the PSA
exhaust provides a maximum overall methane recovery (99 %) with zero methane emitted to the
atmosphere."

The Widnau plant will be owned and operated by Biogasanlage Widnau AG. Product biomethane from the
plant will be injected into the local natural gas distribution grid operated by GRAVAG Erdgas AG, a
Swiss gas utility.

About the QuestAir M-3200

QuestAir's M-3200 purifies methane-containing gas streams such as landfill gas and anaerobic digester
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 300,000 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.



-30-

FOR FURTHER INFORMATION PLEASE CONTACT:

QuestAir Technologies Inc.
Andrew Hall
Director, Corporate Development
(604) 453-6967
Email: hall@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
Glen Edwards
Canadian Media Contact
(604) 623-3007

OR

Canaccord Adams
Mark Ashurst
+44 207 050 6500

OR

Canaccord Adams
Erin Needra
+44 207 050 6500



-0-

                                                                
QuestAir Technologies Inc.
Questair Tech (LSE:QAR)
Historical Stock Chart
From Jul 2024 to Jul 2024 Click Here for more Questair Tech Charts.
Questair Tech (LSE:QAR)
Historical Stock Chart
From Jul 2023 to Jul 2024 Click Here for more Questair Tech Charts.