QuietScore › Bathroom & Utility Fans › KOHLER K-34457-NA
KOHLER K-34457-NA noise level
The KOHLER K-34457-NA is quieter than the category median of 0.7 sones, and its 150 CFM rating makes it suitable for bathrooms up to roughly 150 sq ft.
Full specifications
| Brand | KOHLER |
|---|---|
| Model number | K-34457-NA |
| Model name | 34457 |
| Category | Bathroom & Utility Fans |
| Sound level | 0.4 sones (≈27 dBA, approximate) |
| Airflow | 150 CFM |
| Efficiency | 4.5 CFM/W |
| Duct size | 6.00 inch diameter |
| Speeds | 3 |
| Integrated lighting | Yes |
| ENERGY STAR certified | Yes |
| On market since | 2023-12-01 |
| Markets | United States, Canada |
Quieter alternatives with similar airflow
| Model | Sones | ≈ dBA | Airflow | Efficiency | |
|---|---|---|---|---|---|
| Air King EVD | 0.1 | 7 | 150 CFM | 4.5 CFM/W | specs |
| Air King EVDG | 0.1 | 7 | 150 CFM | 4.5 CFM/W | specs |
| Air King EVDGH | 0.1 | 7 | 150 CFM | 4.5 CFM/W | specs |
| Air King EVDH | 0.1 | 7 | 150 CFM | 4.5 CFM/W | specs |
| Air King EVLD | 0.1 | 7 | 150 CFM | 4.6 CFM/W | specs |
Similar bathroom & utility fans
| Model | Sones | ≈ dBA | Airflow | Efficiency | |
|---|---|---|---|---|---|
| Panasonic RG-C1315LA | 0.4 | 27 | 150 CFM | 10.6 CFM/W | specs |
| KOHLER 34454 | 0.4 | 27 | 150 CFM | 4.4 CFM/W | specs |
| KOHLER 34454-NA | 0.4 | 27 | 150 CFM | 4.4 CFM/W | specs |
| KOHLER 34455 | 0.4 | 27 | 150 CFM | 4.5 CFM/W | specs |
| KOHLER 34455-NA | 0.4 | 27 | 150 CFM | 4.5 CFM/W | specs |
Frequently asked questions
How many sones is the KOHLER K-34457-NA?
The KOHLER K-34457-NA 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 KOHLER K-34457-NA quiet?
At 0.4 sones, the KOHLER K-34457-NA 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 KOHLER K-34457-NA?
It moves 150 CFM, which is adequate for a bathroom of roughly 150 sq ft under the standard 1-CFM-per-square-foot guideline, at an efficiency of 4.5 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.