Most people spend about 90% of their time indoors which includes time spent at work, school, or home. Relative to the outdoor environment, indoor air quality (IAQ) is more important to people in regards to how it affects their health and comfort.

In Ontario, the Ministry of Environment regulates how much air emissions can be discharged into the natural environment and the Ministry of Labour regulates occupational exposure in the workplace. In contrast, IAQ relates more to an occupant's comfort, although health can be affected on a short-term basis. As such, Ontario legislation does not cover IAQ, and reference is made to the American Society of Heating, Refrigerating and Air Conditioning Engineers (ASHRAE) Standards. The two current standards are ASHRAE Standard 62-2001, "Ventilation for Acceptable Indoor Air Quality" and ASHRAE Standard, "Thermal Environmental Conditions for Human Occupancy."

IAQ parameters that typically affect people include temperature, relative humidity, dust, fresh air, drafts, air contaminants, and mold. Control of these parameters is recommended to provide for good IAQ and maximum occupant comfort.

Our company has performed numerous IAQ studies and we use sophisticated electronic equipment to collect data. We can do basic to comprehensive surveys depending on your needs. Services that GTA Environmental provides are as follows:

Services

	Baseline IAQ Survey
	Comprehensive IAQ Survey

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