QuietScore › Bathroom & Utility Fans › Greenheck SP-B50
Greenheck SP-B50 noise level
The Greenheck SP-B50 is quieter than the category median of 0.7 sones, and its 63 CFM rating makes it suitable for bathrooms up to roughly 65 sq ft.
Full specifications
| Brand | Greenheck |
|---|---|
| Model number | SP-B50 |
| Model name | SP |
| Category | Bathroom & Utility Fans |
| Sound level | 0.4 sones (≈27 dBA, approximate) |
| Airflow | 63 CFM |
| Efficiency | 4 CFM/W |
| Duct size | 6.0 inch diameter |
| Speeds | 1 |
| Integrated lighting | No |
| ENERGY STAR certified | Yes |
| On market since | 2020-08-03 |
| 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 |
| AUPU BF4-S10CL | 0.1 | 7 | 100 CFM | 9.5 CFM/W | specs |
| AUPU V4-10HF | 0.1 | 7 | 100 CFM | 9.5 CFM/W | specs |
| AUPU V4-10HL1 | 0.1 | 7 | 100 CFM | 9.5 CFM/W | specs |
Similar bathroom & utility fans
| Model | Sones | ≈ dBA | Airflow | Efficiency | |
|---|---|---|---|---|---|
| Dayton 3DPE2 | 0.4 | 27 | 63 CFM | 4 CFM/W | specs |
| Ortech ODD-70-1 ME | 0.4 | 27 | 75 CFM | 16.7 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 |
| Cyclone CBP50 | 0.4 | 27 | 50 CFM | 4 CFM/W | specs |
Frequently asked questions
How many sones is the Greenheck SP-B50?
The Greenheck SP-B50 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 quiet?
At 0.4 sones, the Greenheck SP-B50 is quieter than 66% of the 840 certified bathroom & utility fans we track, and quieter than the category median of 0.7 sones.
How powerful is the Greenheck SP-B50?
It moves 63 CFM, which is adequate for a bathroom of roughly 65 sq ft under the standard 1-CFM-per-square-foot guideline, at an efficiency of 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 2026-10-05. The dBA figure is an approximate conversion from sones — see our methodology.