A sone is a measurement of sound in terms of comfortable hearing level for an average listener. The lower the sone value, the more comfortable the listening environment. Sones are not decibels or volume, but rather how sound is "sensed".

1 Sone =  The refrigerator running in your kitchen.

2 Sones = The noise level in an office workplace.

3 Sones = The level one would have in a face to face conversation.

4 Sones = The level that most listen to the TV in their home.

5 Sones = Noise level of a busy restaurant at dinner time.

6 Sones = Sporting event in an arena or stadium.

1. Know the Standard: CFM per Square Foot

CFM = Cubic Feet per Minute, the measure of airflow.

The general rule:

1 CFM per square foot of bathroom area

For example, a 60 sq ft bathroom should have a minimum 60 CFM fan.

2. Measure Your Bathroom

Multiply the length × width to get square footage:

Example: 8 ft × 6 ft = 48 sq ft → minimum 48 CFM fan

3. Adjust for Ceiling Height (Optional, for high ceilings)

If your bathroom has ceilings higher than 8 feet:

Use this formula:

(L × W × H) × 0.13 = Minimum CFM

Where:
= Length (feet)

= Width (feet)

= Ceiling height (feet)

4. Add Extra CFM for Features

You may want to add 50–100 CFM if your bathroom includes:

jetted tub

steam shower

used at the same time

5. Use Multiple Fans for Large Bathrooms

For bathrooms over 100 square feet, install:
toilet, shower, tub, or enclosure, or

150–200+ CFM for full-room ventilation

Example Calculation:

Bathroom size: 10 ft × 9 ft × 8 ft

→ Volume = 720 cu ft

→ 720 × 0.13 = 93.6 CFM

→ Round up → 100 CFM fan recommended

Pro Tip:

Choose a fan that's slightly more powerful than needed, especially if ductwork is long or has bends—this helps maintain effective airflow.

CFM stands for Cubic Feet per Minute — it’s a measurement of airflow, indicating how much air a fan can move in one minute.
In Simple Terms:

CFM tells you how powerful a ventilation fan is.
more air, faster.
less air, slower.

Yes. Our exhaust fans are suitable for bathrooms, kitchens, and laundry rooms. They are moisture-resistant and heat-tolerant. Please select the appropriate CFM for your room size.

Exhaust fans should be located in or near the shower or tub, and in an enclosed water closet. Keep exhaust points opposite the supply air source to ensure that the fresh air is drawn through the room. Bathroom doors should not be sealed too tightly at the bottom in order to allow "makeup air" to enter the room when the door is closed.

Installation is straightforward and can be completed by most users. The package includes a step-by-step manual and mounting hardware. However, we recommend hiring a licensed electrician if you’re unfamiliar with wiring.

Some models feature built-in humidity sensors that automatically turn on the fan when moisture levels rise. Please check the model specifications for details.

18555 Gale Avenue, Rowland Heights California 91748, United States

We do not currently offer free returns to overseas customers. You will therefore need to cover all costs of returning any items to us yourself. We advise that you mark your package ‘returned goods’ to avoid further duties. Remember: We strongly recommend that you return any items via a registered trackable service and obtain and retain proof of posting as we do not accept responsibility for items that fail to arrive with us.

If your product arrived damaged, please contact the retailer where you made your purchase. Retailers will have varying return and exchange policies.

All exhaust fans are covered by a 3-year warranty and a 30-day hassle-free return policy. We provide fast customer support for any issues.

For all out of warranty parts & accessories ordering, you may visit the Accessories.