Should I Run My HVAC Fan

At Aspen Aire Heating & Cooling, we know Des Moines homeowners want the best comfort possible, while also saving money on their energy bills. One often-asked question is whether it makes sense to run your HVAC system’s fan continuously, even when the air conditioner or furnace isn’t actively heating or cooling. If you’re wondering if you should run your HVAC fan all the time, here’s the good, the bad, and what truly matters for your Iowa home.

Potential Benefits of Running Your HVAC Fan 24/7

Improved Air Circulation

Keeping air moving helps distribute heated and cooled air more evenly, minimizing hot and cold spots from room to room. This is a real comfort advantage in Des Moines homes.

Better Air Filtration

Continuous airflow helps your HVAC system’s air filter trap more dust, pollen, and other particles, improving the indoor air quality. This is especially beneficial if you have allergies or respiratory issues.

Less System Strain

The frequent on/off cycles of an “Auto” setting might cause more wear and tear than constant operation. Fewer start-stop cycles over time for the HVAC fan could, in some cases, potentially extend equipment lifespan.

Cons of Running Your HVAC Fan All the Time

Increased Energy Bills

It costs money to run the HVAC fan and, while slight, there is an increase in energy usage when the fan runs non-stop. Modern HVAC systems are efficient, and the exact cost increase depends on your system, but it’s a factor to consider.

Filter Changes

Your home’s air filter will get dirtier faster, meaning more frequent and potentially more expensive filter replacements.

Humidity Issues (Especially in Summer)

During humid Des Moines summers, running the central air conditioner helps you feel more comfortable by removing moisture from the air as it moves over the cold AC coils. However, running the fan while the system isn’t cooling can make your home feel muggier inside.

“On” vs. “Auto” Fan Setting – What’s Right For You?

Most thermostats have “On” and “Auto” fan settings. Here’s the difference:

Auto: Fan only runs when your furnace or air conditioner is actively heating or cooling.

On: Fan runs constantly, even when no heating or cooling is happening.

So, What’s the Best Approach for Des Moines Residents?

There’s no universal right answer, but here are some factors to consider:

  • Home layout: Do you fight uneven temperatures in multiple rooms? Running your HVAC fan continuously might help you feel more comfortable.
  • Allergies: If anyone in the home has allergies, increased air filtration from running the fan could be worthwhile.
  • Energy Costs: Are you concerned about utility bills and saving energy? Using the “Auto” fan setting on your thermostat usually increases energy consumption. However, newer, high-efficiency HVAC systems may handle constant fan usage with minimal energy impact.
  • Humid Des Moines Summers: The added humidity caused by continuous fan operation without cooling could be an issue in the muggiest months.

Aspen Aire Heating & Cooling Can Help You Decide

If you live in the Des Moines area and you’re still unsure whether running your HVAC system’s fan 24/7 is right for you, our experienced HVAC technicians can help! We’ll assess your heating and cooling system and your home’s layout and then guide you toward the most comfortable and efficient solution. Contact Aspen Aire Heating & Cooling today at 515-257-8370 to schedule an evaluation.