Final answer:
The length of time to run a power ventilation system depends on factors like space size, ventilation rate, and indoor air quality. Generally, running the system for 2 hours is recommended, but extreme climates may require longer times. It is important to consider fresh air supply and the accumulation of pollutants.
Step-by-step explanation:
The length of time you should run your power ventilation system depends on various factors, such as the size of the space, the ventilation rate, and the quality of the indoor air. In general, it is recommended to run the system for at least 2 hours to achieve proper air turnover in newly constructed homes. In extreme climates, longer turnover times of more than 6 hours may be necessary to ensure adequate ventilation.It's important to note that running the power ventilation system for too long can be unhealthy, as it may lead to a reduction in fresh air supply and the accumulation of pollutants. Therefore, it's best to follow the manufacturer's instructions and consider weather conditions when determining the appropriate duration for running the system.