QuietScore › Bathroom & Utility Fans › AUPU BF4-10L
AUPU BF4-10L noise level
The AUPU BF4-10L is louder than the category median of 0.7 sones, and its 100 CFM rating makes it suitable for bathrooms up to roughly 100 sq ft.
Full specifications
| Brand | AUPU |
|---|---|
| Model number | BF4-10L |
| Model name | BF4 |
| Category | Bathroom & Utility Fans |
| Sound level | 0.8 sones (≈37 dBA, approximate) |
| Airflow | 100 CFM |
| Efficiency | 3.9 CFM/W |
| Duct size | 4.00 inch diameter |
| Speeds | 1 |
| Integrated lighting | Yes |
| ENERGY STAR certified | Yes |
| On market since | 2026-06-01 |
| Markets | United States, Canada |
Quieter alternatives with similar airflow
| Model | Sones | ≈ dBA | Airflow | Efficiency | |
|---|---|---|---|---|---|
| AUPU BF4-S10CL | 0.1 | 7 | 100 CFM | 9.5 CFM/W | specs |
| Greenheck SP-LP0810W | 0.1 | 7 | 100 CFM | 10 CFM/W | specs |
| Greenheck SP-LP0810WL | 0.1 | 7 | 100 CFM | 9.5 CFM/W | specs |
| Venco SP-LP0810W | 0.1 | 7 | 100 CFM | 10 CFM/W | specs |
| Venco SP-LP0810WL | 0.1 | 7 | 100 CFM | 9.5 CFM/W | specs |
Similar bathroom & utility fans
| Model | Sones | ≈ dBA | Airflow | Efficiency | |
|---|---|---|---|---|---|
| QuFresh BC100 | 0.8 | 37 | 100 CFM | 4.7 CFM/W | specs |
| ACIQ ANP100 | 0.8 | 37 | 100 CFM | 4.7 CFM/W | specs |
| AUPU BF4-10 | 0.8 | 37 | 100 CFM | 4 CFM/W | specs |
| Canarm CNP100 | 0.8 | 37 | 100 CFM | 4.7 CFM/W | specs |
| Kaze Appliance SNP100 | 0.8 | 37 | 100 CFM | 4.7 CFM/W | specs |
Frequently asked questions
How many sones is the AUPU BF4-10L?
The AUPU BF4-10L is certified at 0.8 sones in ENERGY STAR lab testing, which is approximately 37 dBA. That is comparable to a quiet modern refrigerator humming in the next room.
Is the AUPU BF4-10L quiet?
At 0.8 sones, the AUPU BF4-10L is quieter than 44% of the 811 certified bathroom & utility fans we track, and louder than the category median of 0.7 sones.
How powerful is the AUPU BF4-10L?
It moves 100 CFM, which is adequate for a bathroom of roughly 100 sq ft under the standard 1-CFM-per-square-foot guideline, at an efficiency of 3.9 CFM per watt.
Data provenance: Sound levels are certified lab measurements (sones) reported in the U.S. EPA ENERGY STAR certified products dataset — not manufacturer marketing claims. Source: ENERGY STAR Certified Ventilating Fans (US EPA), last fetched 2026-06-13. The dBA figure is an approximate conversion from sones — see our methodology.