FOR:  QUESTAIR TECHNOLOGIES INC.

TSX, AIM SYMBOL:  QAR

May 21, 2008

QuestAir Announces Option Grants to Directors

VANCOUVER, BRITISH COLUMBIA--(Marketwire - May 21, 2008) - QuestAir Technologies Inc. (TSX:QAR)(AIM:QAR)
announced today that certain non-executive directors in the Company have been granted stock options as part of
their annual compensation for serving as a director of the Company. The following directors were granted stock
options in the Company at an exercise price of CDN $0.15:

- Mike Rosenberg, Terry Blaney and Keith McLeod were each granted options to purchase 20,000 common shares in
the Company.

- Dr. Denis Connor, Chairman of QuestAir, was granted options to purchase 30,000 common shares in the Company.

All director options vest over 1 year, and are exercisable in accordance with the terms of the Company's 2006
Omnibus Plan.

Disclosure of the directors' option grants, and the disposition of shares directly or beneficially held by
Directors and Directors' family members, is made pursuant to the rules governing the operation of AIM as
established by the London Stock Exchange Plc.

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

Canaccord Adams
Robert Finlay
+44 207 050 6500

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 Edelman
Stephen Burega
Canadian media contact
(604) 623-3007 or Cellular: (604) 506-3734

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QuestAir Technologies Inc.



                                                                

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