QuietScore › Bathroom & Utility Fans › Greenheck SP-B90
Greenheck SP-B90 noise level
The Greenheck SP-B90 is louder than the category median of 0.7 sones, and its 90 CFM rating makes it suitable for bathrooms up to roughly 90 sq ft.
Full specifications
| Brand | Greenheck |
|---|---|
| Model number | SP-B90 |
| Model name | SP |
| Category | Bathroom & Utility Fans |
| Sound level | 0.8 sones (≈37 dBA, approximate) |
| Airflow | 90 CFM |
| Efficiency | 4.3 CFM/W |
| Duct size | 6.0 inch diameter |
| Speeds | 1 |
| Integrated lighting | No |
| ENERGY STAR certified | Yes |
| On market since | 2010-01-01 |
| Markets | United States |
Quieter alternatives with similar airflow
| Model | Sones | ≈ dBA | Airflow | Efficiency | |
|---|---|---|---|---|---|
| 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 |
| Broan XB80=XB00HwithXB80F | 0.1 | 7 | 80 CFM | 13.8 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 |
Similar bathroom & utility fans
| Model | Sones | ≈ dBA | Airflow | Efficiency | |
|---|---|---|---|---|---|
| Panasonic RG-M79LA | 0.8 | 37 | 90 CFM | 4.1 CFM/W | specs |
| Tech Drive TD-BF-02 | 0.8 | 37 | 90 CFM | 3.9 CFM/W | specs |
| Air King AK90LS6 | 0.8 | 37 | 90 CFM | 4.5 CFM/W | specs |
| BV BV-BF-01-PLUS | 0.8 | 37 | 90 CFM | 4.8 CFM/W | specs |
| BV BV-BF-05 | 0.8 | 37 | 90 CFM | 4.8 CFM/W | specs |
Frequently asked questions
How many sones is the Greenheck SP-B90?
The Greenheck SP-B90 is certified at 0.8 sones in ENERGY STAR lab testing, which is approximately 37 dBA. That is comparable to a quiet modern refrigerator humming in the next room.
Is the Greenheck SP-B90 quiet?
At 0.8 sones, the Greenheck SP-B90 is quieter than 44% of the 811 certified bathroom & utility fans we track, and louder than the category median of 0.7 sones.
How powerful is the Greenheck SP-B90?
It moves 90 CFM, which is adequate for a bathroom of roughly 90 sq ft under the standard 1-CFM-per-square-foot guideline, at an efficiency of 4.3 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.