QuietScore › Bathroom & Utility Fans › Delta Pro300
Delta Pro300 noise level
The Delta Pro300 is louder than the category median of 0.7 sones, and its 300 CFM rating makes it suitable for bathrooms up to roughly 300 sq ft.
Full specifications
| Brand | Delta |
|---|---|
| Model number | Pro300 |
| Model name | BreezPro |
| Category | Bathroom & Utility Fans |
| Sound level | 2 sones (≈50 dBA, approximate) |
| Airflow | 300 CFM |
| Efficiency | 7.4 CFM/W |
| Duct size | 6 inch diameter |
| Speeds | 1 |
| Integrated lighting | No |
| ENERGY STAR certified | Yes |
| On market since | 2015-12-31 |
| Markets | United States, Canada |
Quieter alternatives with similar airflow
| Model | Sones | ≈ dBA | Airflow | Efficiency | |
|---|---|---|---|---|---|
| Broan L150E | 0.7 | 35 | 210 CFM | 5 CFM/W | specs |
| Broan L200E | 1 | 40 | 240 CFM | 4.7 CFM/W | specs |
| Ortech ODD-300-3 | 1.2 | 43 | 292 CFM | 6.5 CFM/W | specs |
| Greenheck SP-A200L | 1.3 | 44 | 245 CFM | 4.3 CFM/W | specs |
| Broan L250E | 1.4 | 45 | 270 CFM | 4.6 CFM/W | specs |
Similar bathroom & utility fans
| Model | Sones | ≈ dBA | Airflow | Efficiency | |
|---|---|---|---|---|---|
| Panasonic FV-30VQ3 | 2 | 50 | 280 CFM | 4.4 CFM/W | specs |
| Dayton 3DPE6A | 2.2 | 51 | 270 CFM | 4.3 CFM/W | specs |
| Greenheck SP-A250 | 2.2 | 51 | 270 CFM | 4.3 CFM/W | specs |
| Broan L300E | 2.5 | 53 | 310 CFM | 4.4 CFM/W | specs |
| Greenheck SP-A250L | 2.5 | 53 | 269 CFM | 4.2 CFM/W | specs |
Frequently asked questions
How many sones is the Delta Pro300?
The Delta Pro300 is certified at 2 sones in ENERGY STAR lab testing, which is approximately 50 dBA. That is about the background level of a quiet office.
Is the Delta Pro300 quiet?
At 2 sones, the Delta Pro300 is quieter than 1% of the 811 certified bathroom & utility fans we track, and louder than the category median of 0.7 sones.
How powerful is the Delta Pro300?
It moves 300 CFM, which is adequate for a bathroom of roughly 300 sq ft under the standard 1-CFM-per-square-foot guideline, at an efficiency of 7.4 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.