QuestAir Announces Second Quarter Fiscal 2007 Conference Call

FOR: QUESTAIR TECHNOLOGIES INC.

TSX, AIM SYMBOL: QAR

May 4, 2007

BURNABY, BRITISH COLUMBIA--(CCNMatthews - May 4, 2007) - QuestAir Technologies Inc. (TSX:QAR)(AIM:QAR)
will hold a conference call to discuss its results for quarter ended March 31, 2007 on Friday, May 11,
2007, at 7:00 a.m. PST (10:00 a.m. EST, 3:00 p.m. BST).

Access to the call may be obtained by calling the operator at 08082341382 (Toll Free United Kingdom),
1-866-904-6908 (Toll Free North America), or 1-416-915-8329 (International) 10 minutes prior to the
scheduled start time.

An audio playback version of the call will be available for 7 days after the call at 1-866-245-6755
(Toll Free North America) or 1-416-915-1035 (International). The replay passcode is 780058.

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".

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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

Buchanan Communications
Charles Ryland
UK Media Contact
+44 (0) 20 7466 5000

Buchanan Communications
Ben Willey
UK Media Contact
+44 (0) 20 7466 5000

Karyo Communications
Glen Edwards
Canadian Media Contact
(604) 623-3007

Canaccord Adams
Mark Ashurst
+44 207 050 6500

Canaccord Adams
Erin Needra
+44 207 050 6500

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QuestAir Technologies Inc.

Questair Tech (LSE:QAR)
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