The fan can use just as much as your refrigerator if you are using it all the time. When the switch is set to “ON” the air handler fan motor will run constantly-24/7. Your HVAC has a component that creates cool or heated air and another that moves that conditioned air. Ceiling fans offer comfort, but do not actually reduce the temperature, so even though they are energy misers, there is no sense in running them in an empty room. Once the air temperature reaches the temperature on your thermostat, the fan stops moving air throughout your home. This means it’s consuming less energy than when it runs non-stop, which means lower furnace bills. Choosing Between “On” and “Auto” Some homeowners choose the “on” option instead of “auto” to simply sustain air circulation. Running your fan on AUTO … This form needs Javascript to display, which your browser doesn't support. Allowing the fan to run uninterrupted, there is a more even distribution of warm or cool air circulating through your home. Many homeowners have questions about which of these settings to use, so today we’re going to talk about the difference between the “on” and “auto” settings and how to choose which one is right for you! 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. You’ll need to replace your furnace filter more often as air is constantly being blown through it. There is better dehumidification in your home during the summer months. If you have any questions about the difference between your thermostat’s fan “on” or “auto” settings, or if you’d like a cooling system serviced or installed in your home, contact Hydes, your Coachella Valley air conditioning contractor, at, Prevent HVAC Breakdown this Winter - Coachella Valley, Top Reasons To Consider Furnace Replacement. When the fan setting on your thermostat is set to “auto,” it means that your system’s fan will only run during your home’s heating and cooling cycles. The fan will start about 40 seconds after the burners light and go off about one minute after the temperature is satisfied. Pics of : Should Ac Fan Be On Auto Or On. 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. I'd say a 5K BTU offers just that but at an ideal indoor/outdoor temperatures. The fan setting on your thermostat controls your HVAC’s system blower. Your air conditioner has a blower motor inside that forces the air out and through the ductwork to deliver cool air to all of the rooms in your home. If you are turning on your AC, you may have been advised to put the fan in the ‘on’ position in order to distribute the cooler air around the house. AUTO means that the fan turns on automatically only when your system is heating or cooling air. During heating, the fan is controlled by either a timer circuit or a limit circuit in the unit. When the thermostat reaches your temperature setting, the system, including the blower fan, shuts off. Continuously moving air helps keep the indoor environment from stagnating, but there are more effective and efficient ways to move air than a 300-watt A/C blower fan. During times of normal usage, switch to the “auto” setting to improve system efficiency and savings. A clogged filter also makes your blower work hard and use more energy. Yep, on runs the fan all the time, auto runs the fan when the unit is heating or cooling, and circulate runs the fan at least 30% (or some other predetermined amount) of the time. We’ve provided pros and cons of each setting option, so you can decide which one is best for you. Once the. Pros for “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. Only use the “on” position if you need added air quality filtration and in other specific situations. When your fan is set to AUTO, moisture from cold cooling coils can drip and be drained outside. In a dry climate, you can run the fan "on" with little problems in the gain of humidity. I wanted to circulate the air, and to keep air moving through the high efficiency air filter that most of our houses had. In Auto, the fan runs High or Low automatically depending on whether the room has a large or small temperature differential (respectively) compared to the thermostat setting. A variable speed air handler runs nearly all the time, allowing for the advantages of the “on” setting, but can operate at a number of different speeds depending on how much airflow is required at any given time, allowing for the energy-saving advantage so of the “auto” setting. In the winter, you may notice cool air coming out of your vents. Put simply, if you’re keeping your air conditioning system on at all times (even when you’re not home) you’re not using your AC as efficiently as possible. Commercial  |  Running your fan on AUTO or ON is a personal preference. Air is continually being cleaned causing filters to get dirty more quickly. It blows back into your home and your AC works hard to remove extra moisture from the air. Variable speed air handlers provide a compromise between the “on” and “auto” settings. Set the fan to the “auto” position whenever the compressor is running, and the outside air is too hot. AC unit is oversized, water left on the coil still has a good chance of getting in the home, as obvious from many buildings that have humidity problems even when the stat is in AUTO position. Your HVAC system many now need to run more to offset the additional heat. Should I Use My Thermostat’s “On” or “Auto” Setting? This is supposed to be more energy-efficient. 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 consume any energy. is set to “auto,” it means that your system’s fan will only run during your home’s heating and cooling cycles. document.write(y); This is because the air temperature is similar to the space temperature, your home will feel cool. Cooling  |  Instead, homeowners should choose the "auto" option, or if homeowners choose to run the fan, they should do it for just a few minutes after the cooling part of the unit shuts off. Hold Fan Or Auto Set Your Thermostat To Save Money … ON means that the fan is constantly on and blowing air when your HVAC system is not heating or cooling air. Setting The Fan To Auto: This is a much better option. Because the fan only runs when your home is in a heating or cooling cycle, there are times … Although the "on" setting may waste energy when left in that mode, it can be a useful setting for when you need to flush air out of your home, such as after accidentally burning something in the kitchen. This Thermostat Setting Will Leave Your Home Miserably Humid. 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. Save electricity and keep the FAN setting at “AUTO”. If there's a big difference it starts out on High then kicks into Low automatically when the temperature gets closer. What AUTO and ON mean. 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