QuietScore › Bathroom & Utility Fans › Delta SLM70
Delta SLM70 noise level
The Delta SLM70 is louder than the category median of 0.7 sones, and its 70 CFM rating makes it suitable for bathrooms up to roughly 70 sq ft.
Full specifications
| Brand | Delta |
|---|---|
| Model number | SLM70 |
| Model name | BreezSlim |
| Category | Bathroom & Utility Fans |
| Sound level | 1.9 sones (≈49 dBA, approximate) |
| Airflow | 70 CFM |
| Efficiency | 5.8 CFM/W |
| Duct size | 3 inch diameter |
| Speeds | 1 |
| Integrated lighting | No |
| ENERGY STAR certified | Yes |
| On market since | 2015-10-30 |
| 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 | |
|---|---|---|---|---|---|
| Hampton Bay BF70HD | 2 | 50 | 70 CFM | 3.4 CFM/W | specs |
| VENTECHLATION BPT13-13EN3 | 2 | 50 | 70 CFM | 3.8 CFM/W | specs |
| VENTECHLATION BPT13-13EN-T | 2 | 50 | 70 CFM | 3.8 CFM/W | specs |
| Tech Drive TD-BF-03-1 | 2 | 50 | 70 CFM | 3.8 CFM/W | specs |
| Air King BFQ75 | 2 | 50 | 70 CFM | 3.4 CFM/W | specs |
Frequently asked questions
How many sones is the Delta SLM70?
The Delta SLM70 is certified at 1.9 sones in ENERGY STAR lab testing, which is approximately 49 dBA. That is about the background level of a quiet office.
Is the Delta SLM70 quiet?
At 1.9 sones, the Delta SLM70 is quieter than 10% of the 811 certified bathroom & utility fans we track, and louder than the category median of 0.7 sones.
How powerful is the Delta SLM70?
It moves 70 CFM, which is adequate for a bathroom of roughly 70 sq ft under the standard 1-CFM-per-square-foot guideline, at an efficiency of 5.8 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.