Understanding Bathroom Fan Essentials: CFM, Sones, and S.P Understanding Bathroom Fan Essentials: CFM, Sones, and S.P





 When it comes to bathroom ventilation, three critical terms often come into play: CFM, Sones, and S.P. These acronyms may seem like alphabet soup, but they hold the key to ensuring your bathroom remains a fresh, comfortable space.

CFM: Cubic Feet per Minute

CFM stands for Cubic Feet per Minute, measuring the amount of air a bathroom fan can move in a minute. The higher the CFM, the more air the fan can vent, which is crucial for eliminating moisture, odors, and pollutants. Adequate CFM prevents mold growth and maintains air quality, making it a fundamental factor in fan selection.

Sones: Sound Level Perception

Sones represent the perceived loudness of a bathroom fan. A lower sones rating indicates a quieter fan. Considering sones is vital, especially for ensuring a peaceful bathroom experience.
S.P: Static Pressure

S.P, or Static Pressure, measures the resistance that air encounters as it moves through ductwork or vents. This resistance can affect the fan’s efficiency. Understanding S.P helps ensure that the fan’s CFM is maintained even when faced with resistance, resulting in optimal performance.

Choosing the Right CFM

Choosing the Right CFM

Selecting the appropriate CFM depends on your bathroom’s size. As a general guideline, a 50 CFM fan suits smaller spaces (<50 sq. ft.), while larger bathrooms (100 sq. ft. or more) may need 100 CFM or more. When in doubt, it’s better to err on the side of higher CFM.
Balancing CFM and Sones 

While a higher CFM effectively removes moisture, balancing it with lower sones ensures a tranquil bathroom environment. Opting for a fan with a suitable CFM and a quieter operation enhances the overall experience.
In conclusion, understanding CFM, Sones, and S.P helps you select a bathroom fan tailored to your needs. With the right CFM and a mindful consideration of sones, you can ensure proper ventilation, prevent moisture-related problems, and enjoy a comfortable, tranquil bathroom environment.


Comparing Reversomatic Bathroom Fans: XL SERIES BB-100 vs. QCF-125CO

When it comes to bathroom ventilation, Reversomatic has long been a trusted name in the industry, known for its innovation and commitment to delivering high-quality products. Two of their popular bathroom fans, the XL SERIES BB-100 and the QCF-125CO, stand out as excellent options for ensuring fresh and comfortable bathroom environments. In this comprehensive comparison, we will delve into the features, benefits, and ideal use cases of these two Reversomatic offerings.

XL SERIES BB-100: Exhausting Excellence for Two Bathrooms


The XL SERIES BB-100 is a bathroom exhaust fan engineered to cater to the ventilation needs of two bathrooms, offering a cost-effective solution for homes or spaces with multiple bathrooms. What sets it apart is its unique ability to exhaust air from two separate bathrooms using the REVERSOMATIC balancing box for the second washroom.

Let’s take a closer look at its features:

1. Dual Bathroom Ventilation: As mentioned, the BB-100 is specially designed to ventilate two bathrooms. This feature not only saves on installation costs but also ensures that both bathrooms benefit from efficient ventilation.

2. Balancing Box: The inclusion of the REVERSOMATIC balancing box for the second bathroom is a significant advantage. This balancing box helps maintain consistent airflow between the two bathrooms, ensuring that neither is left under-ventilated.

3. Transition and Baffle: The BB-100 comes equipped with a transition and baffle, which are essential for air balancing. These components help regulate and distribute airflow effectively.

4. Construction: The fan’s construction is noteworthy. It is made of corrosion-resistant heavy-gauge satin coat steel, which not only adds to its durability but also makes it suitable for the humid bathroom environment.

5. Accessories: The BB-100 comes with various accessories, including mounting brackets, a plastic backdraft damper (or a metal collar with a neoprene damper), and a white aluminum louvered grille. These accessories enhance its functionality and adaptability.

6. Optional Features: Reversomatic offers optional features for the BB-100, such as a variable speed control, aluminum backdraft damper, plastic snap-in grille, baffle, inline transition, and balance box. These options allow users to customize the fan to meet their specific needs.

QCF-125CO: Compact and Efficient

In contrast to the BB-100’s focus on multi-bathroom ventilation, the QCF-125CO is a compact and efficient bathroom exhaust fan designed for individual bathroom applications. Let’s explore its notable features:
1. Compact Design: The QCF-125CO is designed with space-saving in mind. Its compact size makes it ideal for smaller bathrooms where space is at a premium.

2. Efficient Ventilation: Despite its small size, this fan doesn’t compromise on performance. It efficiently removes moisture, odors, and pollutants from the bathroom, promoting a healthy indoor environment.

3. Quiet Operation: Bathroom fans should not disrupt your peace and quiet. The QCF-125CO is known for its quiet operation, ensuring that you can enjoy a tranquil bathroom experience.
4. Durability: Just like the BB-100, the QCF-125CO is constructed with quality in mind. It’s built to withstand the challenges of a bathroom environment and provide long-lasting performance.
5. Easy Installation: Installing the QCF-125CO is a breeze, making it an excellent choice for DIY enthusiasts. Its simplicity and efficiency in operation make it a hassle-free addition to any bathroom.

6. Additional Accessories: Reversomatic offers optional accessories for the QCF-125CO, allowing users to further customize their fan based on specific requirements.

Choosing Between the BB-100 and QCF-125CO

The choice between these two Reversomatic bathroom fans ultimately depends on your specific needs and circumstances:
– Multiple Bathrooms: If you have two bathrooms in close proximity or wish to exhaust air from two different spaces, the XL SERIES BB-100 with its dual-bathroom ventilation and balancing box is the practical choice.
– Single Bathroom: For a single bathroom that requires efficient ventilation without taking up too much space, the QCF-125CO’s compact design and efficient performance make it an excellent selection.
– Noise Sensitivity: If you prioritize quiet operation, both fans offer low noise levels, but the QCF-125CO’s compact design often translates to a quieter fan due to its smaller motor.
– Customization: If you desire a fan with customizable features, both fans offer optional accessories to tailor their performance to your specific requirements.


In conclusion, Reversomatic’s XL SERIES BB-100 and QCF-125CO are two top-notch bathroom exhaust fans, each with its unique strengths. By carefully considering the number of bathrooms, available space, and your desired features, you can make an informed decision to ensure efficient and effective ventilation in your home. Regardless of your choice, Reversomatic’s commitment to quality and innovation shines through in both products, promising a fresh and comfortable bathroom environment for years to come. To explore further and discover more exceptional our products, visit us at reversomatic.com. There, you’ll find a wide range of top-quality ventilation solutions designed to elevate your indoor air experience. Whether you’re seeking bathroom exhaust fans, ERV, HRV , Commercial fans, Louvers and dampers and other parts and accessories , Reversomatic’s website is your gateway to a world of ventilation excellence. Don’t miss out on exploring our diverse offerings and finding the perfect solution to meet your ventilation needs. Visit reversomatic.com today and take the first step towards creating a fresher, more comfortable living environment.



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