QuietScore › Range Hoods › Broan ALT4306SS
Broan ALT4306SS noise level
The Broan ALT4306SS is quieter than the category median of 1.5 sones.
Full specifications
| Brand | Broan |
|---|---|
| Model number | ALT4306SS |
| Model name | RANGE HOOD |
| Category | Range Hoods |
| Sound level | 0.8 sones (≈37 dBA, approximate) |
| Airflow | 190 CFM |
| Efficiency | 3.7 CFM/W |
| Duct size | 3.25 inch depth X 14.00 inch width |
| Speeds | 2 |
| Integrated lighting | Yes |
| ENERGY STAR certified | Yes |
| On market since | 2025-03-31 |
| Markets | United States, Canada |
Quieter alternatives with similar airflow
| Model | Sones | ≈ dBA | Airflow | Efficiency | |
|---|---|---|---|---|---|
| Best HBN223012SS | 0.1 | 7 | 180 CFM | 14.2 CFM/W | specs |
| Best HBN223612SS | 0.1 | 7 | 180 CFM | 14.2 CFM/W | specs |
| Best HBN224812SS | 0.1 | 7 | 180 CFM | 14.2 CFM/W | specs |
Similar range hoods
| Model | Sones | ≈ dBA | Airflow | Efficiency | |
|---|---|---|---|---|---|
| Best UCB3I30BLSB | 0.9 | 38 | 160 CFM | 3.2 CFM/W | specs |
| Best UCB3I30SBB | 0.9 | 38 | 160 CFM | 3.2 CFM/W | specs |
| Best UCB3I30SBN | 0.9 | 38 | 160 CFM | 3.2 CFM/W | specs |
| Best UCB3I30SBS | 0.9 | 38 | 160 CFM | 3.2 CFM/W | specs |
| Best UCB3I30SBW | 0.9 | 38 | 160 CFM | 3.2 CFM/W | specs |
Frequently asked questions
How many sones is the Broan ALT4306SS?
The Broan ALT4306SS 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 Broan ALT4306SS quiet?
At 0.8 sones, the Broan ALT4306SS is quieter than 93% of the 72 certified range hoods we track, and quieter than the category median of 1.5 sones.
How powerful is the Broan ALT4306SS?
It moves 190 CFM, at an efficiency of 3.7 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.