Ventilation
Traditional Ventilation (Old Houses)
In the absence of a mechanical ventilation system, the amount of fresh air entering a home is largely random. “Natural ventilation", which is achieved by opening windows, is not ideal because it either provides too much air or not enough.
In older homes, there are eight to 10 times more air that typically escapes through window contours, between floors and up the chimney than in newer R-2000 construction. This is a problem because there is not enough ventilation to remove moisture and other pollutants. The house may then contain more stale air and cause discomfort.
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THE R-2000 STANDARD
R-2000 homes offer a solution to ventilation problems by combining a tight, well-insulated envelope with a high-efficiency mechanical heat recovery ventilator (HRV). The HRV provides a constant supply of fresh, filtered air to all rooms in the home. At the same time, it maintains a balance by exhausting an equivalent amount of stale air from the kitchen and bathrooms where odours and humidity are produced. The ventilation system in an R-2000 home usually provides a complete change of air in the home every three hours. In addition, the ventilation system has a heat recovery device that captures heat from exhaust air outside to preheat fresh air entering the home. Typically, the HRV recovers 70-80% of the heat from the exhaust air, providing homeowners with a supply of fresh air without increasing their energy bills.
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