“Should I set my HVAC fan to auto or on” is a question we commonly receive from Homesense customers. It’s a debated topic throughout the industry, so we’re going to give you the pros, the cons, and our recommendation.
When you set your fan to “ON,” you’re telling it to keep running 24 hours a day, 7 days a week, regardless of the heating or cooling setting. There are a few positives to this feature.
Pros to Keeping Fan Continuously Running:
While keeping your fan on 24/7 may be more energy efficient, there are a few downsides to leaving your fan on all of the time:
Cons to Keeping Fan Continuously Running:
Your other option is to set your fan to AUTO, which means the fan runs when directed to by the unit. Here are the pros and cons to this approach:
Pros to Allowing Fan to as Needed:
Cons to Allowing Fan to as Needed:
There’s no boilerplate recommendation that we make to home owners, because everyone has different needs. At Homesense owner Brian’s home, he has it set ON all day because he has young children that are home and he has allergies, so the improved comfort and air quality are benefits that outweigh the costs. Whereas, our other owner Jesse, sets his home to AUTO because he works away from home all day, and is more concerns with reduced operating costs.
PRO TIP: Many newer thermostats will have a variable speed blower or “circulate” option, that allows you to set the fan on for a certain amount of time every hour. The blower will automatically run at different speeds, giving you the benefits of lower electrical bills and increased comfort.
If you have any other questions about your HVAC fan, send us a tweet! We’d love to hear from you.
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