Definition of Exponential Function. An Exponential Function is a function of the form y = abx, where both a and b are greater than 0 and b is not equal to 1. Exponential Decay. Exponential decay occurs when a quantity decreases by the same proportion r in each time period t.
A vent damper is an automatic devise that shuts off the flue pipe when the burner is not running. A vent damper has no effect on the running efficiency of the appliance. It only saves off-cycle losses of heated air. Therefore, if the appliance is in an unheated space, there is no benefit to a vent damper. A vent damper can achieve up to 10% annual fuel savings.
MECHANICAL / FORCED VENTILATION. A building ventilation system that uses powered fans or blowers to provide fresh air to rooms when the natural forces of air pressure and gravity are not enough to circulate air through a building.echanical ventilation is used to control indoor air quality, excess humidity, odours, and contaminants can often be controlled via dilution or replacement with outside air. However, in humid climates specialised ventilation systems can remove excess moisture from the air.