For Immediate Release 14 April 2008

QuestAir announces completion of testing for refinery hydrogen purifier

VANCOUVER, B.C. – QuestAir Technologies Inc. (“QuestAir“ or “The Company“) (AIM: QAR; TSX: QAR) announced today that testing of the prototype H-6200 hydrogen purifier at an ExxonMobil affiliate refinery in France was successfully completed in March. The H-6200 hydrogen purifier has been operating under test since late October 2007 and has performed well under a range of conditions. The unit has now been placed in commercial use. Coincident with completion of the prototype test, QuestAir and ExxonMobil Research and Engineering Company (“EMRE“) are progressing marketing efforts to commercially deploy the technology more broadly.

Commenting on the prototype test, Jonathan Wilkinson, President and CEO of QuestAir stated, “The successful completion of the testing of the H-6200 hydrogen purifier demonstrates the robustness of the rapid cycle technology.  We believe that the H-6200 will provide refinery customers with significant benefits compared to conventional pressure swing adsorption, and we will be actively working with EMRE to commercialize this product.” 

QuestAir has been working with EMRE since 2003 to develop a large capacity rapid cycle pressure swing adsorption system, marketed as the H-6200, for use in oil refineries and petrochemical plants. This product is anticipated to offer advantages relative to other hydrogen recovery options including lower total erected costs, superior recovery performance, and improved operability.

About the QuestAir H-6200
The H-6200 hydrogen purifier incorporates QuestAir’s proprietary Rapid-Cycle Pressure Swing Adsorption (RCPSA) technology, which operates at significantly higher cycle speeds than the conventional pressure swing adsorption systems.  This results in a direct reduction in the size and cost of the equipment required to purify a given volume of product gas. The H-6200 will be marketed in the oil refining industry as a compact solution for hydrogen recovery, helping refineries address the growing demand for hydrogen.

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”.

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.

For further information, please contact: