Xem thêm

Choosing the Right Radon Fan for Your Home

CEO Khai Intela
In the battle against radon gas and its associated health risks, having the right radon fan is crucial. But with so many options available, how do you know which one is best for your home?...

In the battle against radon gas and its associated health risks, having the right radon fan is crucial. But with so many options available, how do you know which one is best for your home? In this article, we'll guide you through the process of selecting the right radon fan, debunking the myth that bigger is always better along the way.

Best Radon Fan Manufacturers

Before diving into the types of radon fans available, let's first take a look at the top manufacturers in the market. While there are many options to choose from, the big three manufacturers in the industry are RadonAway, Festa, and Fantech. These companies have a proven track record of producing high-quality radon fans that effectively reduce radon levels in homes.

Types of Radon Fans

Radon fans can be categorized into three main types:

  1. Low Suction, Low Airflow: These fans are ideal for homes with drain tile or 4 to 6 inches of gravel beneath the foundation. They are also commonly used to activate passive radon reduction systems. These fans are quiet and relatively inexpensive to operate.

  2. Moderate Suction, Moderate to High Airflow: Suitable for medium to large homes with gravel or drain tile under the concrete slab, these fans can move a significant amount of air without exerting excessive suction. They are ideal for homes with porous material or numerous cracks and openings in the slab.

  3. High Suction, Low Airflow: If your home has tight soils like clay or sand, a high suction fan is the best choice. These fans are capable of creating a vacuum under the entire house, but they tend to be noisier and consume more electricity.

Radon fans Want to learn how to choose a radon fan?

Choosing the Right Radon Fan

Selecting the right radon fan involves careful testing and measurement. By assessing factors such as pressure field extension, required airflow, and operating pressure, professionals can determine the optimal fan for your home.

Pressure field extension refers to how far the suction created by the radon system reaches under your home. This is measured using diagnostic test holes and a micromanometer. These test holes allow experts to determine if additional suction points are required to effectively mitigate radon in all areas of your home.

Airflow, on the other hand, is measured using a pitot tube, which is placed over the suction point. Adjusting the amount of vacuum and airflow applied to the suction point allows professionals to determine the right radon fan for your specific needs.

Additionally, the size of the vent pipe must be considered to minimize friction loss. Typically, 2-inch diameter PVC pipe is used for airflow under 40 CFM, 3-inch pipe for airflow under 70 CFM, and 4-inch pipe for airflow over 70 CFM.

After installing the vent pipe, the selected radon fan is attached and tested to ensure the desired amount of suction is achieved. It's crucial to choose a fan that doesn't exceed the manufacturer's recommended operating pressure to prevent overheating.

Why Bigger Isn't Always Better

While it may be tempting to opt for a larger radon fan, thinking it will lower radon levels even more, this can be a costly mistake. Oversized fans can lead to increased energy bills and potentially dangerous backdrafting situations. It's important to select the right fan based on your home's specific needs and soil conditions.

Radon fan comparison Which radon fan to choose?


When it comes to radon mitigation, selecting the right radon fan is crucial. By considering factors such as soil type, airflow requirements, and pressure field extension, you can ensure that your home is protected from the dangers of radon gas. Remember, bigger isn't always better. Choose a qualified radon mitigation contractor who takes the time to perform diagnostic testing and tailor the solution to your specific needs.

Request a Free Mitigation Estimate