QuietScore › Bathroom & Utility Fans › Delta GBR100
Delta GBR100 noise level
The Delta GBR100 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 | Delta |
|---|---|
| Model number | GBR100 |
| Model name | BreezGreenBuilder |
| Category | Bathroom & Utility Fans |
| Sound level | 1.4 sones (≈45 dBA, approximate) |
| Airflow | 100 CFM |
| Efficiency | 7.9 CFM/W |
| Duct size | 4 inch diameter |
| Speeds | 1 |
| Integrated lighting | No |
| ENERGY STAR certified | Yes |
| On market since | 2018-07-17 |
| 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 | |
|---|---|---|---|---|---|
| Delta 100F | 1.4 | 45 | 100 CFM | 7.9 CFM/W | specs |
| Delta 100HS | 1.4 | 45 | 100 CFM | 8.1 CFM/W | specs |
| S&P PCLP100XP | 1.5 | 46 | 100 CFM | 4.2 CFM/W | specs |
| Anzzi EF-AZ106MB | 1.5 | 46 | 100 CFM | 4 CFM/W | specs |
| Anzzi EF-AZ106WH | 1.5 | 46 | 100 CFM | 4 CFM/W | specs |
Frequently asked questions
How many sones is the Delta GBR100?
The Delta GBR100 is certified at 1.4 sones in ENERGY STAR lab testing, which is approximately 45 dBA. That is noticeable but unobtrusive — quieter than a typical conversation.
Is the Delta GBR100 quiet?
At 1.4 sones, the Delta GBR100 is quieter than 24% of the 811 certified bathroom & utility fans we track, and louder than the category median of 0.7 sones.
How powerful is the Delta GBR100?
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 7.9 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.