A high ventilation rate is usually necessary to eliminate the metabolic product carbon dioxide (CO).

The mechanical component is then used to increase the overall ventilation rate so that the desired internal conditions are met.

Ventilation guidelines are based upon the minimum ventilation rate required to maintain acceptable levels of bioeffluents.

Air quality is assessed (through CO measurement) and ventilation rates are mathematically derived using constants.

Transport of radon in indoor air is almost entirely controlled by the ventilation rate in the enclosure.

Generally, the indoor radon concentrations increase as ventilation rates decrease.

Low to medium ventilation rates can result in formaldehyde concentration of more than 1 PPM.

Increasing ventilation rates and air distribution often can be a cost effective means of reducing indoor pollutant levels.

For example, the equation can be used to calculate the time required at a certain ventilation rate to reduce a high carbon monoxide concentration in a room.

Where the ventilation rate has been adjusted by a mixing factor K.