Sentence 9.32.3.12.(3)

Intent 1:

To limit the probability of the exhaust side of a heat recovery ventilator drawing air through another non-operating heat recovery ventilator, which could lead to a reduced volume of air being exhausted through the intended exhaust duct.

This is to limit the probability of inadequate ventilation, which could lead to the inadequate control of:

• airborne pollutants,
• oxygen and other components necessary for breathable air, or
• relative humidity, which could lead to condensation, which could lead to the generation of pollutants from biological growth or from materials that become unstable on wetting.

This is to limit the probability of negative effects on the air quality of indoor spaces, which could lead to harm to persons.