QuietScore › Bathroom & Utility Fans › Greenheck SP-B50-QD
Greenheck SP-B50-QD noise level
The Greenheck SP-B50-QD is quieter than the category median of 0.7 sones, and its 60 CFM rating makes it suitable for bathrooms up to roughly 60 sq ft.
Full specifications
| Brand | Greenheck |
|---|---|
| Model number | SP-B50-QD |
| Model name | Model SP Ceiling Fan, Direct Drive |
| Category | Bathroom & Utility Fans |
| Sound level | 0.4 sones (≈27 dBA, approximate) |
| Airflow | 60 CFM |
| Efficiency | 3.9 CFM/W |
| Duct size | 6 inch diameter |
| Speeds | 1 |
| Integrated lighting | No |
| ENERGY STAR certified | Yes |
| On market since | 2002-06-03 |
| 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 | |
|---|---|---|---|---|---|
| Greenheck SP-B50 | 0.4 | 27 | 60 CFM | 3.9 CFM/W | specs |
| Dayton 3DPE2 | 0.4 | 27 | 63 CFM | 4 CFM/W | specs |
| S&P PC50XP | 0.4 | 27 | 50 CFM | 4 CFM/W | specs |
| ACIQ ANP50 | 0.4 | 27 | 50 CFM | 4 CFM/W | specs |
| ACIQ AP50 | 0.4 | 27 | 50 CFM | 3.3 CFM/W | specs |
Frequently asked questions
How many sones is the Greenheck SP-B50-QD?
The Greenheck SP-B50-QD is certified at 0.4 sones in ENERGY STAR lab testing, which is approximately 27 dBA. That is about as quiet as rustling leaves; most people cannot hear it over ambient room noise.
Is the Greenheck SP-B50-QD quiet?
At 0.4 sones, the Greenheck SP-B50-QD is quieter than 66% of the 811 certified bathroom & utility fans we track, and quieter than the category median of 0.7 sones.
How powerful is the Greenheck SP-B50-QD?
It moves 60 CFM, which is adequate for a bathroom of roughly 60 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.