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The Pros and Cons of Running a Blower Fan Continuously: Making an Informed Decision

Running a blower fan continuously can have its advantages and disadvantages. In this article, we will explore both sides of the argument to help you make an informed decision.

Pros of Running a Blower Fan Continuously:

1. Temperature Balance: Running the blower fan continuously helps maintain a consistent temperature throughout your home.

The constant circulation of air can prevent hot or cold spots and create a more comfortable environment. 2.

Improved Air Quality: By keeping the blower fan running, you can improve the overall air quality in your home. The continuous movement of air helps to reduce the concentration of airborne contaminants, such as dust, pollen, and pet dander.

3. Reduced Energy Use: Contrary to popular belief, running the blower fan continuously can actually lead to energy savings.

When the fan is on, air is constantly circulating, which means that your HVAC system doesn’t have to work as hard to distribute the air. 4.

Better Air Filtration: Continuous operation of the fan helps improve the effectiveness of your HVAC system’s air filter. With a constantly moving air stream, the filter can capture more particles, ensuring cleaner air for you and your family.

5. Less Motor Wear: When the blower fan is turned on and off frequently, it puts additional stress on the motor.

By running the fan continuously, you can reduce the wear and tear on the motor, prolonging its lifespan. Cons of Running a Blower Fan Continuously:

1.

Filter Getting Dirty Faster: When the blower fan runs continuously, the air filter can get dirty more quickly. This means that you will have to clean or replace the filter more frequently to maintain its efficiency.

2. System Working Harder: Continuous operation of the blower fan can put additional strain on your HVAC system.

This can lead to increased wear and tear on other components, potentially resulting in more frequent maintenance or repairs. 3.

Reduced Indoor Climate Control: Keeping the blower fan running all the time can make it more difficult to control the indoor climate. For example, during the winter, running the fan continuously may lead to cold drafts, while in the summer, it can result in a less efficient cooling.

Climate Considerations and Running the HVAC Fan Continuously in Summer:

In warm and humid climates, it is generally recommended to set your HVAC system’s fan mode to “Auto.” This allows the system to cycle the fan on and off as needed to maintain the desired temperature and humidity level. The Auto mode also helps to dehumidify the air by allowing warm air to evaporate condensed humidity on the evaporator coil.

On the other hand, in dry climates, running the blower fan continuously can have its advantages. It helps maintain a more even temperature throughout the house and provides better air filtration.

As excess humidity is not typically an issue in dry climates, running the fan continuously can be a viable option. In conclusion, running a blower fan continuously can have its pros and cons.

It is important to consider the specific climate and your personal comfort preferences when deciding whether to run the fan continuously or in auto mode. By understanding the advantages and disadvantages of each approach, you can make an informed decision that suits your needs.

Blower Fan Motor Considerations and FAN ON Mode

When it comes to running the blower fan continuously in your HVAC system, it’s important to consider the type of motor your system has. There are two main types of motors used in HVAC systems: PSC (Permanent Split Capacitor) and ECM (Electronically Commutated Motor).

Each type has its own characteristics and considerations when it comes to running the fan continuously in the ON mode.

PSC Motor

PSC motors are the older style of motor typically found in more affordable HVAC systems. These motors are simple and reliable, but they are not as energy-efficient as ECM motors.

If you have a PSC motor, you may be wondering if it’s still okay to run the fan continuously in the ON mode. In general, it is safe to switch a PSC motor to the ON mode for specific purposes.

For example, running the fan continuously can help improve air circulation in certain areas of your home, such as rooms that tend to be hotter or colder than the rest. It can also help with better air filtration, as the constant movement of air ensures that particles are continuously being captured by the filter.

However, it’s important to note that running the fan continuously with a PSC motor can result in a slightly higher energy cost. PSC motors are not as efficient as ECM motors when it comes to continuous operation.

If energy efficiency is a top priority for you, it may be worth considering upgrading to an ECM motor.

ECM Motor

ECM motors are a newer technology in HVAC systems and are known for their high efficiency. These motors use enhanced technology to deliver better performance while using less energy.

If your system is already equipped with an ECM motor, you may be wondering if it’s beneficial to run the fan continuously in the ON mode. With an ECM motor, the energy cost increase of running the fan continuously is minimal.

These motors are designed to operate efficiently even in continuous operation. In fact, running the fan continuously with an ECM motor can provide added benefits such as improved air filtration and better temperature balance throughout your home.

ECM motors are also known for their variable speed capabilities. They can adjust the fan speed to match the specific needs of your home, which further enhances energy efficiency and comfort.

With an ECM motor, you have more flexibility in running the fan continuously without worrying about significantly increasing energy costs. Should the Fan on an HVAC System Run Continuously?

Now that we have discussed the advantages and disadvantages of running the fan continuously, as well as the considerations for different motor types, the question remains: Should the fan on an HVAC system run continuously? Let’s explore the options further.

Yes

Running the fan continuously can be beneficial in certain situations. In a dry climate, where excess humidity is not a concern, running the fan continuously can help maintain a more even temperature throughout your home.

It also promotes better air filtration, as the constant movement of air ensures that particles are continuously being captured by the filter. Additionally, running the fan continuously can help circulate air in areas of the house that tend to be colder or hotter.

No

In a humid climate, running the fan continuously may not be the best option. In this case, it is generally recommended to set the fan mode to AUTO.

When set to AUTO, the fan will only run when the system is actively cooling or heating, ensuring that warm or cool air is properly distributed. Running the fan continuously in a humid climate can potentially lead to condensation on the cooling coils, creating an environment for mold and mildew growth.

Furthermore, running the fan continuously in AUTO mode helps prevent warm or cool air from being pulled back into the system through the grates, ensuring more efficient climate control. In conclusion, the decision to run the blower fan continuously on your HVAC system ultimately depends on various factors such as the type of motor, climate considerations, and personal preferences.

Both PSC and ECM motors have their own considerations when it comes to continuous operation. If you are considering running the fan continuously, it’s always a good idea to consult with an HVAC professional to determine the best approach for your specific system and needs.

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