Q:

Is it best to run the fan constantly on a central heat and air system?

A:

Quick Answer

Continuously running the fan on a central heating and air system presents both pros and cons. Whether the fan is set to On, Auto, or Off depends on both financial and personal comfort goals. Leaving the fan on is costly but provides better air circulation.

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Full Answer

Leaving the fan on continuously can increase the life span of the fan's motor and help keep the air in a home cleaner. It also distributes heated or cooled air through the house evenly. However, to do this costs more in utility bills than if the fan is set to Auto or manually switched to Off when necessary.

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