QuietScore › Bathroom & Utility Fans › Delta 50F
Delta 50F noise level
The Delta 50F is louder than the category median of 0.7 sones, and its 50 CFM rating makes it suitable for bathrooms up to roughly 50 sq ft. It also meets the stricter ENERGY STAR “Most Efficient” criteria for its category.
Full specifications
| Brand | Delta |
|---|---|
| Model number | 50F |
| Model name | BreezSlim |
| Category | Bathroom & Utility Fans |
| Sound level | 1 sone (≈40 dBA, approximate) |
| Airflow | 50 CFM |
| Efficiency | 11.6 CFM/W |
| Duct size | 3 inch diameter |
| Speeds | 1 |
| Integrated lighting | No |
| ENERGY STAR certified | Yes — Most Efficient |
| On market since | 2016-12-02 |
| Markets | United States, Canada |
Quieter alternatives with similar airflow
| Model | Sones | ≈ dBA | Airflow | Efficiency | |
|---|---|---|---|---|---|
| Greenheck SP-A70 | 0.1 | 7 | 70 CFM | 5.1 CFM/W | specs |
| Broan XB80=XB00HwithXB80F | 0.1 | 7 | 80 CFM | 13.8 CFM/W | specs |
| Greenheck SP-A90L | 0.1 | 7 | 99 CFM | 6.1 CFM/W | specs |
| 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 |
Similar bathroom & utility fans
| Model | Sones | ≈ dBA | Airflow | Efficiency | |
|---|---|---|---|---|---|
| Commercial Electric BF1101 | 1 | 40 | 50 CFM | 5 CFM/W | specs |
| Commercial Electric BF1103 | 1 | 40 | 50 CFM | 5.2 CFM/W | specs |
| Commercial Electric BPT13-12EN | 1 | 40 | 50 CFM | 3.7 CFM/W | specs |
| Hampton Bay 1001357397 | 1 | 40 | 50 CFM | 8.1 CFM/W | specs |
| Hampton Bay 7114-02 ME | 1 | 40 | 50 CFM | 10.2 CFM/W | specs |
Frequently asked questions
How many sones is the Delta 50F?
The Delta 50F is certified at 1 sone in ENERGY STAR lab testing, which is approximately 40 dBA. That is comparable to a quiet modern refrigerator humming in the next room.
Is the Delta 50F quiet?
At 1 sone, the Delta 50F is quieter than 30% of the 811 certified bathroom & utility fans we track, and louder than the category median of 0.7 sones.
How powerful is the Delta 50F?
It moves 50 CFM, which is adequate for a bathroom of roughly 50 sq ft under the standard 1-CFM-per-square-foot guideline, at an efficiency of 11.6 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.