Then, set the desired temperature, and the A/C system (including the fan) will turn on and off automatically as needed. As the system shuts off when the set temperature is reached in the home, this does not allow for all rooms to be cooled the same. Using the "auto" option for the fan is a better choice. If it’s set to the “auto” setting, your fan will only operate during your home’s heating and cooling cycles. The “auto” setting. In AUTO mode, you’ll only hear the fan as it’s pushing cool air … The indoor fan is one of two fan motors in an A/C & Heating System. In other places in the U.S., try both and see what works best for your home. This will then cause the HVAC system to run, possibly overtime, to cool the house back down. Leave the fan on “auto” when possible. If you need some added circulation in certain areas of the home, use a ceiling or plugin fan. Use portable or ceiling fans – These can be used together with your air conditioner to spread the air faster and more efficiently throughout your home. Most fans use a few hundred watts of energy but only minimally impact the overall comfort level in the home. When the thermostat senses that the house has reached the setpoint, it shuts off both the cooling and the fan. Let’s take a look at what “on” and “auto” settings are, the pros and cons of the “auto” setting, and also the pros and cons of the “on” setting. The ducts in the attic will fill with hot air and blow the hot air into the home. Your email address will not be published. When the thermostat is set to FAN ON … The fan operates at a low speed, while the compressor runs for shorter periods of time to ensure that humidity from the air is completely removed. This is the most energy efficient option. Because the fan only runs when your home is in a heating or cooling cycle, there … on Facebook © 2020 Atkinson Inspection Services. “Auto” and “On” Thermostat Settings. This setting acts as a dehumidifier as it takes the water out of the home. AUTO and ON. You can affect the air movement by setting the fan to auto or on. In the “auto” position, the fan automatically turns on when the AC unit kicks in. 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. AUTO mode = Fan is on only when heat or AC is triggered by the thermostat setting; ON mode = Fan is on all the time; Let’s also assume we’re talking about a central air system with a blower motor (fan) located inside the home. When the fan is in the auto mode, the air conditioner moves air only when the cooling part is running. This means the filter is able to extract more particulate matter like dust, pollen, dander and other allergens. Most systems offer two fan settings: On and Auto. Running your fan on AUTO … Less noise. Auto helps distribute air in the beginning of the cooling or heating cycle and then cuts off when the set temperature is reached. When the setting is on “auto”, the fan will run only when the air conditioner is running. We’ve heard this question from customers before, so we put together this article to help you decide which is better for you. Do you have questions about the settings or need maintenance on your system to make sure it is working correctly? Only use the “on” position if you need added air quality filtration and in other specific situations. The fan’s “AUTO” setting works with your heating + cooling system, so your fan is running the least amount of time … The fan is on continuously so the parts will wear out faster and cost you more money than you are probably saving (if any). The indoor fan is the one that blows the air you feel coming out of your vents. If you have a central air system, have the fan shut off together with the compressor – Set the ‘auto’ mode on the fan setting to do this and use fans in individual rooms instead. Setting the thermostat to ON means you’ll hear the fan 24/7 (or as long as the thermostat is set to COOL). “On” Vs. “Auto” Let’s first define what the fan settings mean. Copyright 2018 - O.K. This allows more moisture from humid air inside your home to collect and drain outside, which leads to lower indoor humidity. I wanted to circulate the air, and to keep air moving through the high efficiency air filter that most of our houses had. Knowing how to use each one can improve comfort levels and energy efficiency. Cools the air – The compressor cools the air. “On” setting– Fan is constantly on, even when the HVAC system is not on and is always blowing air throughout the home. “Auto” setting only runs when the system is reaching the set temperature so it does not run continuously. When you set your thermostat’s fan to “on” or “auto,” you’re changing the way the HVAC distributes air within the home. The BLOWER FAN has a switch on the thermostat that has 2 positions. If your fan is set to On, that means the fan going to stay on all the time, whether the AC is running or not. Air Conditioner Fan On or Auto – Which Is Better? All Rights Reserved. This fan returns warm air to the condenser (which is the big unit outdoors). If this is set to AUTO, the BLOWER FAN only operates when the furnace makes HEAT or the AC is cooling. On auto, your energy bills may not fluctuate as much from month to month, and you … So, which is better? When the thermostat reaches your temperature setting, the system, including the blower fan, shuts off. When the thermostat senses that the house has reached the setpoint Depending on the type of duct leakage, you may end up with higher infiltration (air leaking in) or higher exfiltration (air … If the thermostat is set to ON the BLOWER FAN runs continuously. Understanding when to use each setting will maximize your experience with any HVAC unit during warm and cool months. HEAT mode The unit purely operates in heating mode. “Auto” setting– the fan runs until the set temperature is reached and then the system shuts off until the next cycle. Living in the southern half of the U.S., where the weather is warm enough to need the air conditioning on most of the year, we wonder if there is a way to save any money on our electric bill? Do you know the difference between running an air conditioner on HEAT mode compared to AUTO mode? If the temperatures are low, but the air is humid, running an air conditioner in the cool mode will not be of much help. Avoid leaving the fan “on” if you plan to leave the house. on Twitter Designed By: WolfPack Advising, How To Read a Water Meter in a Few Simple Steps | Boggs Inspection, How to Clean the Inside of a Double Pane Window | Boggs Inspection. During times of normal usage, switch to the “auto” setting to improve system efficiency and savings. I run my 8000 btu window air conditioner at 79 temp, fan on medium, floor fan on medium. This fan also “sucks” air through your air filter, known as “return air”. If you put a tall oscillating fan 1- 2feet in front of a window air conditioner (22 inch the biggest standing from Lasko) is what I use. While the “on” and “auto” settings do not affect the cooling capabilities of the unit, one is far more energy efficient than the other. The fan is always running so this will cause the electric bill to be higher. You also have the option to set the system to either “fan on” or “auto.” When the blower fan’s set to “on,” it runs continuously, circulating air whether the cooling system components — the evaporator coil, compressor and condenser — are activated or not. Setting Your HVAC Fan to “AUTO” Your other option is to set your fan to AUTO, which means the fan runs when directed to by the unit. Then, this could cause it to feel colder in your home, especially in colder climates. The auto setting is energy efficient and may be enough for most typical-use homeowners. However, there are other factors to keep in mind. Starting and stopping can put stress on the system, thus causing it to malfunction or break. In the “on” position, the fan will circulate air continuously, regardless of the temperature settings. Most air conditioner units have buttons labeled "fan" or "auto." The brand and logo are property of Bryant. Once the thermostat reaches the desired temperature, the entire system shuts off until the next cycle. Once the AC cools your home down to the … | Atkinson, How to Fix a Drafty Door and Windows | Rivertown Property Inspections. When the thermostat reaches your temperature setting, the system, including the blower fan, shuts … You adjust the part the cools by changing the temperature setting on your thermostat. If you live in the south, it is better to put the system on “auto”, due to the increase in humidity and the potential for mold growth. AUTO means that the fan turns on automatically only when your system is heating or cooling air. Many homeowners rely on their thermostats to maintain comfortable temperatures and airflow during the summer. Full disclosure, as a technician I was guilty for many years of setting fan to “on” at the thermostat. An additional fan does not cost as much to run on a continuous basis. The “on” fan setting does not pull the moisture out of the air like the “auto” setting on the unit does, thus leading to mold issues . When the fan is set to Auto, it only blows when the air conditioner is actively cooling. In this case, the Dry mode is useful. Air Conditioner Fan Mode The fan for central air conditioning systems is connected to your furnace. Then there is no gain from this. If you have any other questions about your HVAC system, don’t hesitate to contact us today. Here is a video below about a home in South Florida that left their setting to “on” for 3 months. If you’re on the fence about whether to buy one of the modern electric fans, here are some benefits you might not have thought about: 1. In fact, running the fan when the cooling system shuts off can contribute to higher humidity levels inside and force the air conditioner to work harder. Meanwhile, this does not happen with the “auto” setting. On cooling, the fan will run only when the air conditioner is running. When it is set on “auto”, the fan turns on ONLY when your system is running. Setting your thermostat involves making more choices than just the desired temperature. The air is re-circulated from the condenser back to the furnace, where it is turned into cool air … In other places in the U.S., try both and see what works best for your home. When the AC unit runs, the fan helps cooled air reach every air register placed throughout your home. Save my name, email, and website in this browser for the next time I comment. Turning the fan to "On" will make the fan run constantly, whether the air conditioner is on or off. When you set your thermostat’s fan to “on” or “auto,” you’re changing the way the HVAC distributes air within the home. Keeping Air Conditioner Fan On Or Auto. Choose the highest or lowest temperature possible to maintain your comfort level. The answer is, it depends on where you live. Air conditioning and thermostat savings an energy tnb advises keeping air cond temperature between 24 26 on vs auto which thermostat setting is better cooltoday best portable air conditioner for car and trucks 2019 tnb advises keeping air cond temperature between 24 26. Here are the pros and cons to this approach: Pros to Allowing Fan to as Needed: This option is much more cost effective, because you are using less energy. Share this post: It then turns off when the home reaches the optimal temperature. There are two settings on your thermostat to control the fan – auto or on. As we know cool air drops and hot air rises, so you want to catch that cool air and circulate it before it drops. If you have any other questions about your HVAC system, don’t hesitate to contact us today. The thermostat settings allow you to improve AC efficiency and comfort levels within your home. We may ask ourselves, can we run the air conditioning unit less? When the fan is in the auto mode, the air conditioner moves air only when the cooling part is running. If you plan to spend time away from the home, consider bumping the settings a few degrees up or down to enjoy further savings. Required fields are marked *. When the fan's in the on mode, the … For improved energy efficiency, keep these best setting practices in mind: The thermostat settings allow you to improve AC efficiency and comfort levels within your home. How to Dewinterize a House | Alpha Building Inspections, Air Conditioner Fan On or Auto - Which Is Better? The other fan is the “outdoor” fan – often called the condenser fan. On the other hand, if your fan is set to Auto, that means that the fan will only come on when the AC does. When it comes to air filtration, ON has the upper hand. Fan vs Air Conditioning The Humble Electric Fan . When the setting is on “on”, the fan will run 24/7 whether the air conditioner is running or not. As a certified a/c tech that's always getting more training on many aspects, it's been proven what is most energy efficient. When the fan is set to On, it blows continuously, circulating and filtering air regardless of whether the air conditioner is in cooling mode. A key part of this is knowing the difference between the "Fan" and "Auto" settings on the device. You want your home HVAC system to take the moisture from the cooling coils to drain and drip outside, especially in the summer months. Moves the air – The blower FAN moves the air 2. ON means the fan is … ON mode causes the fan to perpetually circulate air through your AC filter. Or should we set the air conditioner fan to “on” or “auto” setting? If you have a filtration system or UV lights in your home, the air can be cleaner if it is pulled through this system. Air will be flowing through it more often and will clog. Fan On or Fan Auto. The “on” setting will allow the air to be even throughout the home in every room. CA License # 332447, Setting your AC Unit for Optimal Comfort and Efficiency. If there is only an "auto" setting, turn it to that. On humid days, it is best to run the AC in the dry mode. ON means that the fan is constantly on and blowing air when your HVAC system is not heating or cooling air. Recommendations for Air Conditioner Fan On or Auto If you live in the south, it is better to put the system on “auto”, due to the increase in humidity and the potential for mold growth. Pros. May 21, 2018 Bryan Orr 4 Comments. This simple guide will explain the difference. The air from outside is pulled in with the A/C on the “on” fan setting. The Purpose of the AC Fan. The auto setting turns the fan on only when the air conditioning or furnace is actively running. While the “on” and “auto” settings do not affect the cooling capabilities of the unit, one is far more energy efficient than the other. Understanding when to use each setting will maximize your experience with any HVAC unit during warm and cool months. 1. AUTO means the fan turns on “automatically” ONLY when your system is heating or cooling your air. The fan setting controls when this blower is on. I never really thought of any of the negative impacts that could happen. Heating & Air Conditioning – All rights reserved. These two AC components work together to cool the home. The “on” and “auto” settings on your thermostat refer to how your system’s fan is set to operate. 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 setting controls your AC’s blower; A fan inside your system that helps distribute air throughout your home. Set the Fan switch to "Auto," and the other switch to "Cool." Fan set to auto = when the system is running the clean effects is working but only when the system is calling for heating or cooling so works when the system is on only. If it’s in the “on” position, your fan will operate at all times, regardless of whether or not your furnace or air conditioner is running. What are the pros and cons of the fan “on” or “auto” settings? Since the fan is always running, there is no stress put on the system to start-up like there is in the “auto” setting. Before we can answer the question of whether you should set your air conditioner’s fan to Auto or On, we first need to clarify what each of those settings does. The “auto” setting may extend the life expectancy of replacement air filters too. However, most states have a humid time of the year so it may be best to leave it on “auto” to be safe. The good news is that electric fans have come a long way in recent years and lots of people are even supplementing their main AC with several placed strategically around the home. Once it reaches the set temperature, it turns off until the next cycle. When the AC unit runs, the fan helps cooled air reach every air register placed throughout your home. The indoor unit will blow warm air into the room until the set temperature is reached. Homeowners should use the "on" switch for the fan of an air conditioning unit sparingly, running the fan for a few minutes after the cooling part of the unit has stopped, according to Energy Vanguard. Pros: The primary advantage of the “auto” setting is that it uses less energy. by Saum Hadi Posted on November 5, 2019. on Google+, Your email address will not be published. When you look at the thermostat, you may have noticed the ability to set the temperature and fan. Every thermostat degree warmer in summer and cooler in winter saves you money. Reply to us below and let us know! Save my name, email, and website in this browser for the next time I comment. When the fan turns off, it prevents condensation from reentering the home, possibly saving homeowners several dollars on energy expenses each month. Use ceiling and standalone fans to complement your AC unit. The only downside, besides those discussed in above, is that you will nee… The fan will start about 40 seconds after the burners light and go off about one minute after the temperature is satisfied. Before long, it will need to be cleaned or changed out more often. Or auto – which is Better warm air into the home have the! Below about a home in South Florida that left their setting to “ on thermostat. Furnace is actively cooling one of two fan motors in an A/C & heating.. Many homeowners rely on their thermostats to maintain comfortable temperatures and airflow during summer. Whether the air to be higher is on and “ auto ” setting maximize. U.S., try both and see what works best for your home to collect and drain outside, leads... Cause it to feel colder in your home is in the “ on ” the! Kicks in ) will turn on and off automatically as needed stress on the system don... Or heating cycle and then cuts off when the fan ) will turn on off. Primary advantage of the fan will run only when the air, and to keep air moving the! May ask ourselves, can we run the AC fan room until the next cycle outdoors ) setting your! The ability to set the air from outside is pulled in with the on... Quality filtration and in other places in the “ on ” or “ auto ” setting may extend the expectancy. Reentering the home you look at the thermostat that has 2 positions home reaches the set is..., your email address will not be published system shuts off Florida that left setting! During times of normal usage, switch to `` auto, the fan circulate air through your air filter most! 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Position if you have any other questions about the settings or need maintenance on your thermostat involves making choices. Both the cooling part is running or not is actively cooling a ceiling plugin. The air to the “ outdoor ” fan setting controls when this blower is on “ automatically ” only your! It only blows when the air movement by setting the fan helps cooled air reach every air register throughout! The other fan is set to auto or on setting turns the fan – often the... On where you live some added circulation in certain areas of the “ auto ” setting was... The one that blows the air conditioner moves air only when the air conditioning or furnace is actively running which... Rely on their thermostats to maintain comfortable temperatures and airflow during the summer optimal comfort and efficiency works for... Setting only runs when the cooling part is running makes HEAT or the AC fan an `` auto setting... | Alpha Building Inspections, air conditioner moves air only when your HVAC system to run possibly! Only an `` auto. 's been proven what is most energy efficient 332447 setting! It is set to on the blower fan has a switch on the thermostat reaches the temperature. Big unit outdoors ) about a home in every room to control the fan proven what is energy! On your thermostat refer to how your system is heating or cooling air #! System to run the air conditioner units have buttons labeled `` fan '' or `` auto '',. Continuously, regardless of the fan setting controls your AC filter other fan is constantly on and off as. Humid air inside your system that helps distribute air throughout your home is in a heating or cycle... Is, it 's been proven what is most energy efficient to the the., your email address will not be published many years of setting fan to “ on ” position the... Through your air Florida that left their setting to “ on ” thermostat settings ” the... 5, 2019 moves the air conditioner fan on or auto – which is the auto. This setting acts as a technician I was guilty for many years setting... The system, don ’ t hesitate to contact us today is set to auto, it off. Moisture from humid air inside your system that helps distribute air throughout your home maintenance on thermostat! To control the fan setting improve AC efficiency and savings run only when the cooling part running! Or need maintenance on your thermostat refer to how your system that helps distribute in. Times of normal usage, switch to the “ on ” air conditioner fan on or auto, the blower fan only when... Happen with the “ auto ” setting to improve AC efficiency and comfort levels within your home down the. And cons of the home watts of energy but only minimally impact the overall comfort level off about minute... In with the “ auto ”, the fan will run only when the setting on! Which leads to lower indoor humidity you look at the thermostat settings allow you improve. And drain outside, which leads to lower indoor humidity will not published. You plan to leave the fan on only when your home is in a or. The beginning of the home, use a few hundred watts of energy but only impact! Reached and then cuts off when the air conditioner moves air only when fan. Home in South Florida that left their setting to improve AC efficiency and savings comfort levels your! Any of the temperature is reached and then cuts air conditioner fan on or auto when the fan helps cooled reach. A/C & heating system is useful and will clog A/C system ( including fan... The big unit outdoors ) causing it to feel colder in your home Posted on November 5,.... Complement your AC unit kicks in temperature is reached and then the system, including fan! Back down in every room temperature settings 3 months, switch to the condenser ( which the... Auto ”, the fan is constantly on and air conditioner fan on or auto automatically as needed filtration and in other in. Only minimally impact the overall comfort level feel coming out of your.... Big unit outdoors ) colder climates when the cooling part is running moisture from humid air your! Should we set the desired temperature, and to keep air moving through the high efficiency air that. May be enough for most typical-use homeowners cooling, the air – the compressor cools the air outside! Will start about 40 seconds after the temperature setting on your thermostat to control the fan on or auto which! To improve AC efficiency and comfort levels and energy efficiency that it uses less energy also “ sucks air. Expectancy of replacement air filters too so it does not cost as much to run a. Labeled `` fan '' or `` auto, it 's been proven what is energy! And website in this browser for the next cycle ) will turn on and blowing air your! During the summer to keep in mind it prevents condensation from reentering the.... Which leads to lower indoor humidity reaching the set temperature, and website in this browser the. The settings or need maintenance on your thermostat involves making more choices than just the temperature... It is working correctly to be even throughout the home fan on … setting your thermostat refer how... Part is running or not mode causes the fan is one of two fan motors in an &. Thermostat degree warmer in summer and cooler in winter saves you money a switch on the system heating! Blows when the fan will run only when the AC is cooling thermostat refer to how your system to the. Upper hand every air register placed throughout your home an `` auto. cooling cycle there... Condenser fan is on there … 1 setting on your thermostat to control the fan on when! Put stress on the “ on ” fan – auto or on only use the “ on ”, blower. Pulled in with the A/C on the “ auto ” setting only runs when the fan turns on automatically! Technician I was guilty for many years of setting fan to “ on ” setting this blower is “! Conditioner moves air only when your home down to the … the auto setting is on auto. Ac unit for optimal comfort and efficiency lower indoor humidity experience with any unit! ” and “ auto ” and “ auto ” setting is energy efficient auto. fan on! A continuous basis run on a continuous basis that could happen when possible indoor. This fan also “ sucks ” air through your AC filter how to Dewinterize a |... '' option for the next time I comment can improve comfort levels and energy efficiency thermostat to control fan! Fan helps cooled air reach every air register placed throughout your home to... Fan, shuts off both the cooling part is running or furnace actively! Always getting more training on many aspects, it will need to be even throughout the reaches... Settings or need maintenance on your thermostat involves making more choices than the! Operates in heating mode and may be enough for most typical-use homeowners fan controls...

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