QuietScore › Bathroom & Utility Fans › Greenheck SP-B50L
Greenheck SP-B50L noise level
The Greenheck SP-B50L is quieter than the category median of 0.7 sones, and its 59 CFM rating makes it suitable for bathrooms up to roughly 60 sq ft.
Full specifications
| Brand | Greenheck |
|---|---|
| Model number | SP-B50L |
| Model name | SP |
| Category | Bathroom & Utility Fans |
| Sound level | 0.3 sones (≈23 dBA, approximate) |
| Airflow | 59 CFM |
| Efficiency | 3.8 CFM/W |
| Duct size | 6.00 inch depth X 6.00 inch width |
| Speeds | 1 |
| Integrated lighting | Yes |
| ENERGY STAR certified | Yes |
| On market since | 2021-08-02 |
| 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 | |
|---|---|---|---|---|---|
| Air King LEDAK50 | 0.3 | 23 | 50 CFM | 4.4 CFM/W | specs |
| Broan XB50 | 0.3 | 23 | 50 CFM | 11.8 CFM/W | specs |
| Tech Drive TD-BF-06 | 0.3 | 23 | 70 CFM | 4.6 CFM/W | specs |
| Delta SLM70D2 | 0.3 | 23 | 70 CFM | 7 CFM/W | specs |
| Win Air BPT14-13E | 0.3 | 23 | 70 CFM | 4.6 CFM/W | specs |
Frequently asked questions
How many sones is the Greenheck SP-B50L?
The Greenheck SP-B50L is certified at 0.3 sones in ENERGY STAR lab testing, which is approximately 23 dBA. That is near the threshold of human hearing — effectively silent in a normal room.
Is the Greenheck SP-B50L quiet?
At 0.3 sones, the Greenheck SP-B50L is quieter than 75% 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-B50L?
It moves 59 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 3.8 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.