Fan Setting in Your HVAC

How to Use the Fan Setting in Your HVAC System

March 23, 2018

The fan settings on HVAC systems are straightforward, but all homes are different. The auto setting is temperature controlled and runs when the thermostat detects the need for temperature adjustments. The on setting tells your system to run non-stop regardless of the temperature indoors. There are advantages and disadvantages to each setting.

Advantages of Running Fans Non-Stop

Continuously circulating air helps with temperature regulation within homes. Rooms should be evenly heated or cooled. Startup stress on your HVAC system is greatly reduced, which can extend the life of some units.

When filters are properly changed, and systems are well-maintained, leaving fans on can reduce indoor air pollution. Allergy and asthma sufferers especially benefit from this from spring through early fall.

Disadvantages of Running Fans Nonstop

Running fans continuously costs money. During the hottest months of the year, air ducts can fill with hot air because of the environment in walls and attics. Leaving fans running can lead to air conditioning working too hard.

In winter, cold air ducts lead to more demand on the heater. The more fans run, the more maintenance they need. Call a technician for seasonal maintenance, especially when we use fans "on" setting continuously.

Advantages of the Auto Setting

Cost-effective and smart, the auto setting saves homeowners a lot of money. This setting is designed to keep homes comfortable by only using the heater or air conditioner when it is needed. Fans run at the lowest speed necessary to get the job done. The air is more effectively dehumidified, too.

Disadvantages of the Auto Setting

Startup stress on the HVAC system can lead to slightly more frequent repairs to the fan. Homes might have rooms that are cooler or warmer than others.

Every home is different. Call our HVAC specialists at Sandhills Heating if you have any quesstions about the fan setting on your HVAC system.

Image provided by Shutterstock

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