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HVAC Thermostat Auto vs. On

Posted by: Cooper MechanicalWednesday, October 02, 2019

Thermostat auto vs. on

On vs. Auto: What's the Difference?

Every thermostat has a button or feature allowing the user to cycle through different settings. While there may be options for custom cycles, every thermostat has auto, on, and off. If you've ever wondered what the difference between "auto" and "on" is, you're not alone. 

"Auto" and "on" are HVAC settings that control your system's fan. The fan is located inside your HVAC unit and its job is to help distribute air. The "V" in HVAC is for ventilation, and your fan is responsible for aiding air circulation. 

Auto: In the auto setting, the fan automatically moves air when the HVAC system is cooling or heating. Once the desired temperature setting has been reached, the fan will shut off.

On: In the on setting, the fan will run continuously, even after the set thermostat temperature has been reached.

Which Setting Should I Use?

The "auto setting" is more cost effective since fewer mechanical pieces are running when your home is at your set temperature. The auto setting also is quieter and in the long-term, it means less wear and tear on your unit's fan.

The "on setting" means your fan is always running, so it can clog filters more quickly, add to your electric bill, and make it feel a little chillier in winter with air blowing on you. 

However, there are some instances when the on setting is helpful. If some rooms tend to get stuffy, the on setting can help keep air moving and circulating. It can also help you feel more comfortable during Myrtle Beach's hot and sticky months. Some also state that running the fan more often helps the HVAC unit trap more particulates, which may be helpful for those with allergies or asthma.

Upgrade Your Thermostat for More Functionality

If you travel or are out of the home for long periods of the day, you may want to consider a smart thermostat. In addition to features that allow customized settings to save money and energy, smart thermostats also allow user to control their thermostat remotely via smartphone or device. 

With a smart thermostat, you could keep your thermostat set to a more economical temperature while at work, and then set the thermostat remotely to a more comfortable setting before you leave the office for home.

For more HVAC, electrical, and mechanical services, please Call Cooper!