There are several types of mechanical ventilation systems including exhaust-only, supply-only and balanced systems, and their selection depends on the nature of the house, its occupants, and the budget available.
Mechanical ventilation is an important tool for supplying fresh air to Canadian homes, and is required to achieve good IAQ in airtight houses. Window opening can also create challenges in managing relative humidity in the winter and summer. Ventilation solely by window opening can lead to excessive energy costs, particularly due to heat loss in the winter or loss of conditioned air in the summer. Occupants generally have little control over natural ventilation, aside from opening and closing windows. Residential ventilation may occur naturally or mechanically. Efficient ventilation helps improve indoor air quality (IAQ) as it reduces pollutant and moisture levels that may directly or indirectly result in poor occupant comfort and/or adverse health effects.
Using ventilation to improving indoor air quality.Factors affecting ventilation needs and efficiency in Canadian homes.Strategies to maintain acceptable indoor air quality.
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