What Does Circ Mean On Thermostat

What Does Circ Mean On Thermostat? It moves the air into the thermostat when it is off. Many new settings have “circulate” for on and off settings which is an easy way for better air circulation with less electric current. CIRC is the selection of fans installed in the thermostat. It runs the fan repeatedly within an hour and avoids the exhaust fan running slowly.
What Does Circ Mean On Thermostat

What is the fan circ meaning?

It is a system of moving air in the application instead of when it is on. Many of the new fan settings have an offer called “circulate.” It is a hybrid of the “on” and “off” “auto” settings. Moreover, it allows you more and better air circulation with significantly less electricity consumption. If available, the circle’s position (circulation) will cause the fan to run approximately 35% of the time, less whenever the fan runs with the heating or cooling system.

A fan selection called CIRC is present in thermostats, especially in Honeywell thermostats. It means it will run the fan for several minutes every hour.

Sr.No Circ on thermostat properties
1 Circulates air
2 Auto on and offsetting.
3 Saves 35% of the time

Fan on and forced air

The heat is produced in the central unit and distributed throughout the area. A forced air system is an HVAC system using air ducts and vents to circulate heat-controlled air into the area/house. When the heating is on, the fan will only turn on when your home is warming up. When it comes to cooling, the fan will only work if your air conditioner is running.

Sometimes thermostats now have a recirculation setting that turns the fan on for a while to aid air circulation. A system of air distribution, both warm &cool, in an HVAC system is known as a forced air system. Fan on and circulates have two different meanings.


Many of the new devices have an option of cycling running of the fan on thermostat models. This system, known as fan circ on the thermostat, allows cycling airflow. It ensures less consumption of electricity and hence less electricity bill.

The fan circulation set up

A constantly circulating air is necessary for a more evenly cooled home, as when the fan is on “on” setting.

  • It can improve indoor air quality, and you can check it with the best air quality apps.

  • Provides comfort

  • Prevent hot and cold spots formation in the home

Furthermore, fans are most effective when they have an uncontrolled pathway in front of their blades. Generally, a fan is set from the front side with “air drawing in” condition and at the rear side with air “drawing out” property. If your item has outlets at the topmost, they should be positioned as exhaust fans because hot air will rise. They should use side-mounted fans for intake, yet they often don’t have an air filter.

With fan Circulate, you can set the time for the fan. It can run for

  1. 15 minutes per hour (15 minutes)

  2. 30 minutes per hour (30 minutes) or

  3. Forty-five minutes per hour (45 minutes).

The fan should start every hour and can continue to run after the heating or cooling period according to the desired temperature.

The AC fan circulate setting

The most energy-efficient option is to run your fan on “auto.” So, instead of the continuous running fan will run when you are only “on the system.” It is better to maintain humidity during summer. When the fan is on the auto setting, it drips and drops moisture from outside cooling coils. So, in this way, the AC fan brings the air in and out.

Video guide

Here is the video guide for your ease.

Turning on the HVAC Fan Benefits of Continuous Fan Operation: Less frequent fan starts and stops can reduce the load after startup and potentially extend its life. Keeping the fan running 24/7 will make the air cleaner as the air draws through the filter or UV light system.


Setting the Honeywell thermostat fan settings to a desired temperature or time allows better comfort. A fan with circ settings runs smoothly in a cyclic way and provides better temperature control with less electricity usage. It will reduce the load on the fan and finally increases its life. A fan runs 15-40 minutes/ hour with circ fan Honeywell thermostat settings.

How does the fan work on Honeywell thermostat models?

The fan is located in the indoor unit and helps distribute the air conditioning throughout the house. Auto means the fan will run automatically only when the air is heated or cooled. The fan turns off when your home reaches the temperature set on the thermostat.

Everyone has a different idea of ​​comfort, but recirculating fans are generally a good choice when the outside temperature is below 85oF. However, the fan-only setting can increase power consumption during the day and on warm evenings during heat waves.

The fan setting on the Honeywell thermostat models controls the HVAC system fan. The fan helps circulate hot or cold air through the house until the thermostat temperature arrives. Auto setting means the fan will only turn on automatically when the system is heating or cooling the air. The same is the meaning of auto on AC.

Honeywell thermostat Information
Location In the indoor unit
Heat setting Automatic on and off
The suitable temperature 85 Farenhite is the appropriate temperature for setting up.
System fan control HVAC

Can I just run the fan on my air conditioning system?

It is more energy efficient to run the fan without air conditioning, but only in certain situations and for a short time. When scalding outside, your ducts get hot, especially if they’re in your attic or under the floor.

The HVAC fan does not draw air into the air conditioner. Although there is a break in air conditioning, usually heat pumps, part of your system is outside the home but does not take a stand from outside. The main operational goal of cooling the air in the house is not achieved by introducing fresh air but by removing unwanted heat.

Reduce humidity

Most homeowners don’t realize that your air conditioner has two roles:

  1. Cooling your home and

  2. Dehumidifying it.

However, leaving the Honeywell thermostat fan on will prevent the air conditioner from removing as much moisture from your home.


A fan on circ thermostat settings runs automatically only when the air is heated or cooled. The fan turns off when your home reaches the temperature set on the thermostat. The internal fan of AC can run, allows air circulation without cooling, and consumes less energy.

Does the automatic mode save or use less electricity?

The air conditioning system automatically adjusts the temperature and fan speed to the ambient temperature. Auto mode is the most energy-efficient air conditioning option as the fan runs at the minimum speed required for heating and cooling for the shortest possible time.

The fan mode on air conditioners

When the fan mode on the air conditioner is on, the internal fan circulates the air in the room without any cooling. Fan mode usually results in lower energy consumption because the compressor is off. The air conditioner does not produce cold air, but you get better ventilation, which will help you lower the temperature.

The AC power consumption

Running an air conditioner in fan mode has many benefits as it reduces energy consumption. It uses significantly less power than AC with settings other than the fan, like heating, dry or cooling mode. It is because a fan consumes less power than the compressor.

A typical AC fan motor consumes approximately 500 watts while spinning. So if you let the fan run continuously (720 hours) for a month, you are using 360,000-watt hours (720 x 500) or 360-kilowatt hours (kWh). In short, running the fan in AUTO mode will save you around $ 300 per year.

It is better if the air conditioning runs for 15-19 minutes. Ideally, the air conditioners are allowed to run simultaneously for 15-20 minutes in moderate temperatures. A thermostat usually cannot control fan speed; using a higher speed will not heat the house as fast and can increase your electricity bills.

Does the fan need to be turned off when the air cooler is running?

The HVAC fans must turn on and off with the rest of your structure for cooling and heating. It’s a normal condition of a kick before heating starts and after the end of cooling, for a few minutes. It ensures not to allow your fan to run its own for a long time.

For residential purposes, it is recommended not to use fans at all. This only increases the consumption of the air conditioning system. Ventilate and let the air conditioning do the work. If you have a fan in your room and an air cooler, then only run the fan for the first five minutes.

Is it better to leave the fan on, or will it do it automatically?

Leave your fan on auto is the best option for smooth running and less energy consumption. It will only run when it is needed instead of continuous running. It will generate a cycle between cold and warm air.


The circ fan thermostat settings are best because it allows the fan to run only in the cycle and then automatically turn it off at the desired temperature. It only runs when needed and consumes less power, thus reducing electricity bills. A thermostat only controls the temperature, not the speed of the fan.


Here are some questions related to what CIRC means on the thermostat.

Q1. What does fan CIRC mean on my Honeywell thermostat?

It is a system of moving air in the application instead of when it is on. Many of the new fan settings, especially Honeywell thermostat, have an offer called “fan circulate.” It is a hybrid of “on” and “auto” settings. It allows you more and better air circulation with significantly less electricity consumption.

Q2. What is the difference between fan on and forced air?

A system of air distribution, both warm &cool, in an HVAC system is known as a forced air system. A fan-on system allows only heat and cool air with respective settings.

Q3. How is the fan circulation set up?

With Circulate, you can set the time for the fan. It can run for

  • 15 minutes per hour (15 minutes)

  • 30 minutes per hour (30 minutes) or

  • Forty-five minutes per hour (45 minutes).

Q5. How does the fan work on a Honeywell thermostat?

The thermostat regulates and turns the fan on and off. This setting is in cold or warm temperature according to the required temperature.

Q6. Should I pass my fan around?

It is only a matter of one’s comfort. But safety precautions are a must.

Q7. What is the Major difference between fan on and circulate?

Fan on only works to heat your home when heat is on. Similarly, it will run to cool your home when cool is on.

While “circulate” is a setting in modern devices to turn “off” and “on” your device to circulate hot and cold air.

Q8. What does it mean by circulating mode on AC? Or what does fan circ mean on a Honeywell thermostat?

A fan setting in new devices is known as “circulate.” It is a hybrid between on and auto options. It allows the fan to run in cycles and better air circulation, thus providing a better cooling experience. You will get more comfort with less electricity consumption than with the “on” setting.

Q10. How do you use a fan to circulate an air conditioner?

Place a fan under the opening, where the AC comes out to drive the air in a home. Fans can also be positioned with their heads sloped down so that the cool air falling to the floor can ascend and cool the room.

Q11. What is the best way to use an air circulator?

To take full advantage of mild temperature and seasonal winds, place your air circulator near an open window or sliding door. Please put it in place with unpassable upward air movement in winters.

Q12. How do you get fresh air in your house?

Fresh, outdoor air helps to keep our homes germs-free. You can get fresh air in your house as

  • Open your house windows and doors as much as you can with precautions

  • Use fans to move air in and out of the home

Q13. What is a thermostat?

The thermostat is a device used to normalize the temperature.

Q14. Does a fan on AC pulls air from outside?

Almost none of the air conditioners pull in the fresh air. Infect, an air conditioner uses a mechanism to draw and disperse it by a structure. In this way, air recycles by AC.

Q15. How do I reset the Honeywell thermostat fan settings?

You can reset your Honeywell thermostat fan settings by following the steps as

  • Firstly, please turn it off by switching it to the off position

  • Then find your HVAV system’s power breakers and turn them off.

  • Secondly, wait for half a minute and turn it back on.

  • After that, the thermostat also turns on.


Many people ask, “What does circ mean on Honeywell thermostat?” To conclude, the fan circ mean on a Honeywell thermostat is a modern setting in devices in between the “on” and “auto” settings. It allows the fan to run in cycles and provides better air circulation. It only allows the fan to run when it achieves the desired temperature instead of all-time running. Hence, providing a better sense of comfort with less consumption of electricity.

This article was last updated by Abdul Qadeer on 19/7/22.

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