Forced Air Heating Fan On Or Auto

If you set your furnace fan to auto the fan will only run when the system tells it to in order to keep your home as warm as you want it based on your thermostat settings.

Forced air heating fan on or auto.

Auto helps distribute air in the beginning of the cooling or heating cycle and then cuts off when the set temperature is reached. This means that at times it will circulate cold air. If your fan runs constantly your monthly heating bills will be higher. The auto setting turns the fan on only when the air conditioning or furnace is actively running.

What are the pros and cons of the fan on or auto settings. Once the thermostat reaches the desired temperature the entire system shuts off until the next cycle. If you have your furnace again or air conditioning fan set to auto your system s fan will run during the furnace s heating cycle only. The auto setting means less energy usage because it keeps the fan running the least amount of time at the slowest speed needed for heating and cooling.

Don t run the fan in the heat of the summer. The primary advantage of the auto setting is that it uses less energy. There are two settings on your thermostat to control the fan auto or on. This means it s consuming less energy than when it runs non stop which means lower furnace bills.

Also i have a huge air register in the middle of the living room floor. To be safe unless you have a specific reason to keep the fan running constantly just place your central air or furnace fan setting on auto. On means that the fan is constantly on and blowing air when your hvac system is not heating or cooling air. The fan s auto setting works with your heating cooling system so your fan is running the least amount of time needed at the slowest speed.

When your fan is on auto moisture is able to drip from the cold cooling coils and drain outside. Running your fan on auto or on is a personal preference. My forced air gas furnace is in the crawl space. The auto setting can cut some of that cost.

Your furnace filter will last longer. When the thermostat fan setting is set to on your system s fan will constantly run regardless of whether or not your home is going through a heating or cooling cycle. The fan will start about 40 seconds after the burners light and go off about one minute after the temperature is satisfied. If your fan is running constantly the heat exchanger never gets a chance to cool down either which can cause serious issues.

Or could the circulating air help the window units work more efficiently. On cooling the fan will run only when the air conditioner is running. When your system reaches the temperature you ve set for it the fan will shut off until the next cycle. Because the fan only runs when your home is in a heating or cooling cycle there are times when the fan is completely off and doesn t.