Ventilation

Heat and energy recovery ventilators exhaust air from the building while providing replacement fresh air. The ventilator uses an exchanger to transfer heat (and moisture in an ERV) between the exhaust and make-up replacement air.

All buildings breathe–exchange air between the interior and exterior. The rate of air exchange is affected by many factors including:

• The quality of the envelope (all the exterior surfaces)*
• Quality of vents/flues (bathroom and kitchen fans heating units, fireplaces, etc.)*
• The temperature delta between the interior and exterior
• The humidity delta between the interior and exterior
• Wind speed and direction
• Building height

Within this list, the quality of the envelope and the quality of the vents/flues are the factors we can reasonably control.

Although these and other factors contribute to making every building unique, it can be generally assumed that the older the building the weaker the envelope–although we’ve all experienced exceptions.

CLICK HERE for more detailed information on Heat Recovery Ventilators and Energy Recovery Ventilators

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