QuestAir Receives US$2.85 Million Order for Biomethane Purification System

    FOR:  QUESTAIR TECHNOLOGIES INC.

TSX, AIM SYMBOL:  QAR

June 29, 2007

QuestAir Receives US$2.85 Million Order for Biomethane Purification System

BURNABY, BRITISH COLUMBIA--(Marketwire - June 29, 2007) - QuestAir Technologies Inc.
(TSX:QAR)(AIM:QAR) announced today that it has received an order valued at US$2.85 million for an M-
3100 system to upgrade anaerobic digester gas created from organic waste to pipeline quality methane.

QuestAir's multi-unit M-3100 system was purchased by Phase 3 Developments & Investments, LLC of Ohio,
a developer of renewable energy projects in the agricultural sector. The plant will produce pipeline-
grade methane from anaerobic digester gas generated from organic waste. The plant is expected to be
fully operational in the spring of 2008.

Jonathan Wilkinson, QuestAir's President and CEO, said: "Once constructed, we believe this plant will
be one of the largest commercial facilities in North America to use an anaerobic digestion system to
generate pipeline-grade methane from digester gas. Higher energy prices make the purification and
recovery of methane from renewable sources a viable alternative to more traditional uses of biogas
such as the generation of heat or electrical power."

"Biogas purification is a very important market for QuestAir. We offer purification systems in a range
of capacities to meet the needs of developers of renewable biomethane. The M-3100 is a scalable, skid-
mounted system which can be used to purify methane generated from anaerobic digesters, water treatment
plants and landfill gas," Wilkinson added.

Norma McDonald, Operating Manager of Phase 3, said: "This is an important project for our company and
frankly, for the US. The project puts the US on a course to catch up with Europe in the field of using
and upgrading biogas generated from organic waste. Since electricity prices are much lower in the US,
it is important for us to develop alternative markets for biogas. QuestAir's systems provide a proven,
reliable and cost-effective route to pipeline-quality gas."

About 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 20
million cubic feed 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".

About Phase 3 Developments & Investments, LLC

PHASE 3 DEVELOPMENTS & INVESTMENTS LLC provides services to agricultural customers related to
renewable energy and bio-based products. Services include financing and grant application preparation,
business and technical feasibility studies, marketing of renewable energy and bio-based products,
including emission credits. As a project developer, PHASE 3 DEVELOPMENTS & INVESTMENTS LLC assists
clients in the selection of vendors, equipment procurement, as well as the associated mechanical,
electrical and controls engineering required to integrate individual pieces of purchased equipment or
equipment modules. Clients may also benefit from PHASE 3 DEVELOPMENTS & INVESTMENTS LLC's construction
project management and commissioning services, including coordination with permitting agencies. PHASE
3 DEVELOPMENTS & INVESTMENTS LLC is a registered Ohio company, and qualifies as a small, women and
veteran-owned business.

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
[phone]
Email: [e-mail]
Website: www.questairinc.com

OR

Phase 3 Developments & Investments LLC
Norma McDonald
Operating Manager
[phone]

OR

Buchanan Communications
Charles Ryland / Ben Willey
UK media contact
[phone]

OR

Karyo Communications
Paul Welsh / Stephen Burega
Canadian media contact
[phone]

OR

Canaccord Adams
Mark Ashurst / Erin Needra
[phone]


								
QuestAir Technologies Inc.