Mailing List
You can subscribe or unsubscribe to our Mailing List at any time.

May 21, 2009
ATI Airtest Technologies Inc.



DELTA, BC, May 21, 2009 –- AirTest Technologies (TSXV: AAT) announced today that it has received a
$90,000 initial order for carbon dioxide (CO2) sensor products to be integrated into the products offered
by WattMaster Controls Inc., a Kansas City based manufacturer of controls used by building contractors
and major HVAC equipment manufacturers.

The CO2 sensors WattMaster has ordered are compact sensor modules designed to be easily integrated
into Original Equipment Manufacturer ("OEM") electronic products. The sensor is very low profile and can
easily be designed into most wall-mount enclosures typically used for sensing temperature or other indoor
environmental parameters. The sensor is self-calibrating and requires no maintenance over its 15 year
rated life. According to Mike Hobbs, President of WattMaster, "We decided to work with AirTest because
of the depth of their product and application knowledge, plus the fact that they offered the best product for
our application that requires us to control building ventilation based on CO2 levels."

AirTest's self-calibrating CO2 sensors save energy in buildings by regulating outside air ventilation based
on the actual number of people in a space. This ensures that only enough outside air is heated or cooled
to meet the immediate needs of occupants. Much of the demand for this type of sensor is driven by the
growing interest in making buildings energy efficient, an important part in creating green and sustainable
buildings. For example the LEED building certification program operated by the US Green Building
Council provides certification points for including CO2 measurement and control to ensure good indoor
environmental quality while at the same time saving energy. CO2 ventilation control can represent a
simple but highly effective way for almost all buildings to reduce energy use while ensuring good indoor
air quality for occupants.

In addition to its own product line of sensors for building control, AirTest offers a wide range of OEM
sensor technologies targeted for the use of independent controls and equipment manufacturers who need
to integrate AirTest's sensor technologies into their products.

About AirTest: AirTest Technologies ( is a Green-Tech company
specializing in sensors that improve commercial building operating efficiency and at the same time create
energy savings. These sensors are all based on technical innovations developed in the last ten years,
and comprise a growing second wave of energy saving technologies that will make a significant
contribution to the Sustainable Buildings Program. AirTest offers its products to leading-edge building
owners, contractors and energy service companies targeting the buildings market. AirTest also provides
energy cost reduction solutions to building equipment and controls manufacturers who incorporate
AirTest sensor components in their products.
About WattMaster Controls Inc.

WattMaster Controls Inc. is a privately held company based in Kansas City, MO that designs and
produces building energy management and control systems. A large part of their business is also related
to the development and manufacture of unique control products for major manufacturers of heating,
cooling and industrial automation equipment.

# # #

Statements about the Company’s future expectations and all other statements in this press release other
than historical facts are “forward looking statements”. The Company intends that such forward-looking
statements be subject to the safe harbours created thereby. Since these statements involve risks and
uncertainties and are subject to change at any time, the Company’s actual results may differ materially
from the expected results.

For further information, please contact:

Mr. George Graham, President

Phone: (604) 517 3888
Fax : (604) 517 3900

Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the
policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this

Published: May 21, 2009 Last Updated: May 21, 2009