The order is a representative of larger corporate multi-year commitment of retailer to implement green and sustainable practices to decrease the energy costs and environmental impact for its 1,100 stores across Canada.

George Graham, president of Airtest, said We began working with this Company three years ago, after a pilot project in a Toronto store showed significant energy savings when compared to an identical store that did not use CO2 sensors to control ventilation. As a result, all new stores since then have used our sensors and this order is part of their effort to upgrade all of their facilities.

AirTest’s self-calibrating CO2 sensors save energy in the buildings by regulating the outside air ventilation based on actual number of people in a space. This ensures that only enough outside air is heated or cooled to meet immediate requirements of occupants. Outside air ventilation can account for 20% of the air circulated in a building and 30 to 50% of the heating and cooling load. A 2005 US Environmental Protection Agency study of commercial buildings found that over 80% of the buildings estimated were over-ventilated. Most existing buildings do not measure or control ventilation, and often are set up to offer maximum ventilation at all times.

Graham stated It is like running an air conditioner all the time regardless of the temperature inside.

AirTest’s CO2 sensors offer feedback to the building control system to measure and control the outside air ventilation so that air quality and code needs are met, but wasted energy from over-ventilation is avoided.

Graham added, 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.