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Duct Booster Fan: Do They Really Work?

By using a suitable duct booster fan, you can easily solve the uneven temperature issues.

Heating, ventilation & air control can be performed through the duct booster fans. They are known as HVAC and can solve uneven hot or cooling problems.

What is Duct Booster Fan?

The duct booster fan boosts the airflow of the room. It spreads the air in the whole room to maintain the same temperature everywhere. The duct booster fan needs a small amount of energy to do its work. What is Duct Booster Fan?

The price of this kind of product is quite reasonable. You can easily find it in the market. Now, you have to understand whether it will work or not for you.

In most cases, the duct booster fans work excellently for home, office, grow room, greenhouse, etc. But in some cases, they don’t work effectively because of wrong selection and miss-matching for your work.

If you follow this guide, we hope you can understand what kind of duct booster fan you need, and the device will work for you.

So, let’s start.

Why Do You Need the Duct Booster Fan?

The booster fans for ductwork are effective solutions for some common problems like high temperature etc. It spreads air everywhere in the room and thus maintains the temperature. It also has an air pressure switch. Here are some beneficial points to understand why people use it.

To solve the uneven heat & cooling problem

It is a common situation that your house’s temperature will not same for every part. This situation is also common for the office, greenhouse, grow room, etc. This is a significant problem for your comfort and work. By using the duct booster fan, you can solve this problem.

This type of fan spreads the room’s air in every part of the room. So, when it is the hot season, the booster fan circulates the cool air in every part of the room and vice versa.

To maintain the HVAC of a room

HVAC indicates heating, ventilation & air conditioning. When you use the duct booster fan for your work, you can manage the HVAC quite easily.

These three things are critical factors for room environment management. A duct booster fan controls the temperature of the room air. You can use the fan as a suitable ventilator and control the ventilation system.

When you use a central air conditioning system, you have to ensure that every room of your system will remain in the same air temperature and pressure.  If you use a duct booster fan, you can easily control this.

Easy to install and maintain

The installation process of the duct booster fan is quite simple. Anyone can complete the task efficiently. The maintenance of the fan needs almost nothing.

To save money

The duct booster fans are quite reasonable in price. They are easy to install, maintain, and control. They also need a small amount of electricity to operate. On the other hand, other processes of duct management are more costly than the booster fan.

The duct booster fan can complete the ductwork quite smoothly. If you want to manage your room’s HVAC in a money-saving and effective way, you may need the duct booster fan.

Why is the Duct Booster Fan Important for the Grow Room?


It is necessary for the grow room to maintain the ideal humidity, HVAC, and air balance. The grow room’s air factors are not controlled by its own. You have to handle it wisely.

For this reason, the duct booster is an ultimate choice. Almost every grow room contains the duct booster fans as they control the airflow entirely.

  • The duct booster fan solves the uneven heating or cooling of the grow room quite merely.
  • It performs as the exhausting system for the grow room.
  • It helps to maintain the normal air pressure and flow for the plants.
  • By the exhausting or exchanging between the grow room air and the natural air, you can maintain the grow room’s humidity. This is important for the grow room’s plants.
  • Moreover, it is an effective and money-saving device for the grow room.

How Does the Duct Booster Fan Work?

It is quite a simple process to understand. The duct booster fan has a strong motor that can rotate at super-fast speed and increase airflow. It has a power controlling system, motor controller, and fan’s blades. Some advanced duct fan has a thermostat, remote control system, etc. features.

The power controlling system ensures a suitable supply for the motor. The motor controller controls the motor’s speed. When the motor starts its work, the blades begin to rotate and increase the airflow. It also creates a low-pressure zone at the top of the duct. The air tries to maintain the static pressure, and it begins to move.

That’s how the duct booster fan works.

Different Types of Duct Fans and Duct Booster Fan Reviews

There are mainly two types of duct booster fans. They are registered as booster fan & inline duct booster fan. You can understand the difference and their mechanism after reading this part.

Register Booster Fan

AC Infinity AIRTAP T4, Quiet Register Booster Fan with Thermostat ControlThe register booster fan stays at the ceiling register of the room. You can also install it on the wall or floor.  The installation process for this kind of fan is quite simple and economical.

You can easily handle the rectangular register fan. It is only a plug and plays a system to work. You can also add a remote control system, thermostat, etc. features to it. Nice and quiet.

The main disadvantage of the register booster fan is that it’s quite noisy. It creates a lot of noise when it runs, which can be problematic for you. But it varies from person to person.

We recommend ones with variable fan speed.

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Inline Duct-Booster FanAC Infinity CLOUDLINE T6, Quiet 6” Inline Duct Fan with Temperature Humidity Controller


It is a great alternative for the duct works. The inline duct-booster fan is a cylindrical booster fan. It is a heavy-duty fan. You have to place this fan between the HVAC source and the selected room(s). It produces less noise than the register fan. The rectangular fan also has a thermostat.

For the installation process, you may need an expert electrician. Because some hardware and wiring works are required, and it is crucial to install it in the right location.

There are various kinds of inline duct-booster fans. You have to select the suitable one for your workplace as your choice. Otherwise, it will not be beneficial for you.

Here are some types of inline duct-booster fan:

  • Inline duct exhaust fan
  • External mount duct fan
  • Centrifugal duct fan, Mixed flow fan
  • Rodon fan, Multi-port ventilation fan
  • Axial fan
  • Propeller fan

These types also have different sizes for various kinds of uses.

A recessed duct fan is another type of quiet ductwork fan. This kind of rectangular fan fits into the wall. You can easily maintain this fan as like as the register booster fan. Read here to know more about the best booster fans for ductwork.

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How to Install a Duct Booster Fan?

For the installation, you don’t need any sophisticated machinery or tool for this process. You may have these things in your house.

  1. 4-in-1 screwdriver
  2. Wirecutter
  3. Wire tape

But only for the inline duct-booster, you may take some help from the electrician. I have divided the whole into these steps for easy to understand.

Select the right installation place

It is the first and foremost step for the duct booster fan installation process. The efficiency of this machine mostly depends on it. If you choose the right place for the duct fan, it will provide the required services. Otherwise, it can be a loss project for you.

It is ideal for installing the duct booster near the problematic room. Try to fit it on the ceiling or wall to avoid the waste of the room’s space. Some people prefer putting it on the floor. You have to ensure the installation point can quickly get the electric supply line for the fan.

Check all the connections and the fan carefully.


It is necessary to check the connection and the fan throughout the start of the primary installation process. Because if any problem remains in the connections, you can solve it easily before the installation. Otherwise, it will become more complex to solve.

Check the outer surfaces of the fan. If you find any problem, you can replace the fan easily before the installation.

Create space for the duct booster fan to install

If there is already space for the ductwork fan where you want to install it, you can efficiently complete the job. But most of the time, people don’t find this facility. For this work, it is ideal for taking help from a professional.

Ensure a safe power supply

Without a reliable and continuous power supply, the duct booster fan cannot give proper output. An unsafe supply system or connection can bring disasters. So, it is mandatory to ensure safe power supply for the fan.

Check the duct booster fan after finish all the steps

Run at least two trials to ensure all the things are fine. If the duct booster fan works properly in the trial periods, the installation process is finished. Now, you will get the ductwork, and the HVAC works from the booster fan.

If you want to benefit from the duct booster fan, you must install it in the right way. Otherwise, you will face some problems maintaining the ductwork.

How to Choose the Best Duct Booster Fan?

You have to consider some factors to choose the best duct booster fan for your work. They are the fan model, CFM capacity, static pressure (air pressure switch), and loudness limit. If you find all of these in the right proportion in a duct booster fan for your work, it will be the best and suitable for you. How to Choose the Best Duct Booster Fan

Fan model

All the duct booster fans’ work output is the same. But they are different in their size, capacity, method, and other features. It is necessary to understand what you need. The budget is another critical thing for the selection process. It varies from person to person.

It is ideal for reading the user manual and learning the feature benefits, pros, and cons of the fan models before buying it.

CFM capacity

CFM stands for cubic feet per minute. It is an ideal way to determine the air-exchange capacity of a fan. A proper building code might have the information required CFM for a particular structure. Every model of the duct booster fan shows the CFM capacity as a feature of it.

You can calculate the CFM for a room by using this formula. CFM = Room Volume / change per minute.

Here is a CFM list for some workspace rooms that will help you to understand what you need for your work.

  1. Boiler rooms need 1-3 min./change
  2. Factories need 2-7 min./change
  3. Laboratories need 2-5 min./change
  4. Living rooms need 1-3 min./change
  5. Grow rooms need 2-5 min./change

Static Pressure


The static pressure measurement is a vital fact for the selection process. To measure the static pressure, you can use a manometer. The average static pressure of the duct fan system is less than 2 inch SP.

To maintain the average static pressure in the room, you have to select the right fan. The duct booster fan produces a low-pressure region at the top of the exhausting area. The static pressure also depends on the air velocity.

You have to measure your room’s static pressure and bring the right fan that works efficiently in this pressure. You can find the information in the duct booster fan’s manual.

Loudness limit

The standard duct booster fans create noise, and it is a regular thing. But excessive noise can bring trouble to your works. This varies from person to person. Try to choose the duct booster fan that creates less noise when it runs.


Comparing can bring a good result for you. By comparing, you can save money and get a more suitable fan for your ductworks. If you compare the duct booster fan for your work, you can quickly learn the benefits and drawbacks of those fans. It will save you valuable time also.

Final Words

Using a duct booster fan with the thermostat can give you more comfort in the case of a room’s atmosphere control. The ductworks are very important for your house, grow room, and other workspaces.

When you can maintain the ductworks using the right duct booster fan, why don’t you use it? These fans are cheap and need the lowest maintenance works. They also use a small amount of electricity to run, which is really good.

The duct booster fan is an excellent solution for the room’s HVAC system. If you can find a suitable one for your work, it will work for you. So, I hope you have understood what kind of booster fan you may need for your work and how to complete your work by using it.

See also: Best Grow Tent Fan Reviews, Buyers Guide & Our Top 6 Best Picks