Most new gas furnace thermostat features different controls for fan control. The thermostat setting that you select have a direct influence on the heating bills. You can save hundreds of dollars just by using the right thermostat settings in the home.
One aspect of the thermostat setting that most people get confused about is the ‘On’ and ‘Auto’ settings.
Should you set the fan to ‘on’ or ‘auto’? Which one is the better furnace thermostat setting?
In this article, we will look at the pros and cons of each so that you can decide for yourself which one is the right setting for the home furnace. Need more advice? Contact the professional team at Wagner Mechanical!
The pros and cons of the ‘On’ thermostat setting
Setting the thermostat settings to ‘On’ keeps the fan running at all times. When the fan is kept running, the air is pulled through the in-built filtration system that keeps it clean. In addition, keeping the fan running will result in fewer starts and stops of the fan thereby reducing the risk of a malfunction.
The major disadvantage of keeping the fan running is that it jacks up the heating bills. Unless variable speed motor is installed, it will cost you as much as $50 per month to keep the fun running 24/7. Another con of keeping the fan running constantly is that the air filter will tend to clog up quickly due to which you will have to change the filter frequently.
Also, when the fan is running, you will feel cold air coming from the vents. While the temperature of the air will be similar to that of the space heater, it will feel cold when compared to your body temperature.
The pros and cons of the ‘auto’ thermostat setting
The ‘Auto’ thermostat function will make the fan run according to your specified settings. The fan can be controlled through a timer circuit inside the unit. Generally, the auto setting will start the furnace fan about half a minute after the burner is lit. The fan is turned off about a minute after the desired temperature is reached.
The main benefit of setting the thermostat to ‘Auto’ is that it will result in more energy efficient usage. This is because the fan will run only when it’s required. Also, the air filter will need to be changed or cleaned less frequently when the thermostat setting is set to ‘Auto’.
However, more starts and stops will mean that the fan will wear out more quickly. In addition, it will result in the less efficient distribution of heat inside the room.
The above discussion will make it clear to you whether ‘On’ or ‘Auto’ thermostat setting is right for you. If you want to keep the energy bills low, you should set the thermostat to ‘Auto’. However, if you prefer more even distribution of heat inside the house, it’s better that you set the thermostat setting to ‘On’.