An adequate interior environment is favourable to the good health, well-being and productivity of occupants. Building owners who care about this aspect of building management improve their chances of maintaining a high occupancy rate. COFELY Services technical operation contracts offer an assessment of indoor air quality to ensure compliance with minimum requirements under the Workplace Health and Safety regulations (WHSR) as well as the American Society of Heating, Refrigerating and Air-conditioning Engineers Inc. (ASHRAE). This helps building owners and managers protect the health and comfort of their tenants. For monitoring purposes, tests are conducted at numerous times throughout the year.