QuietCool Classic CL-3100 RF
A ducted Classic fan with a 10-year warranty for a small home or one zone. It costs less up front than the Energy Saver but draws more power.
Amazon $949$949
The QuietCool Classic CL-3100 RF is the better whole house fan overall, rated 3.8 to 3.7. The QuietCool Classic CL-3100 RF leads on value and efficiency. The QuietCool Classic CL-2250 RF wins on noise. The QuietCool Classic CL-2250 RF costs $100 less ($849 vs $949).
QuietCool Classic CL-2250 RF
A ducted Classic fan with a 10-year warranty for a small home or one zone. It costs less up front than the Energy Saver but draws more power.
Amazon $849$849
Prices were last checked November 2, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the QuietCool Classic CL-3100 RF for value ($398.74 per 1,000 CFM ($949, 2,380 CFM) vs $479.66 per 1,000 CFM ($849, 1,770 CFM)) and efficiency (8 CFM per watt vs 7.1 CFM per watt).
- Choose the QuietCool Classic CL-2250 RF for noise (43.2 dBA at high speed vs 49.4 dBA at high speed).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every up to 3,000 CFM whole house fan; a clear win is highlighted. How we rank explains each one.
| Factor weight | QuietCool Classic CL-3100 RF | QuietCool Classic CL-2250 RF |
|---|---|---|
| Overall rating | 3.8/5 | 3.7/5 |
| Value 30% | 58 $398.74 per 1,000 CFM ($949, 2,380 CFM) | 45 $479.66 per 1,000 CFM ($849, 1,770 CFM) |
| Efficiency 20% | 50 8 CFM per watt | 35 7.1 CFM per watt |
| Noise 15% | 69 49.4 dBA at high speed | 89 43.2 dBA at high speed |
| Damper 10% | 33 R-5 insulated damper | 33 R-5 insulated damper |
| Warranty 25% | 100 10-year warranty on the motor | 100 10-year warranty on the motor |
Specifications
| QuietCool Classic CL-3100 RF | QuietCool Classic CL-2250 RF | |
|---|---|---|
| Airflow | ||
| Airflow, high speed | 2,380 CFM | 1,770 CFM |
| Power, high speed | 299 W | 250 W |
| Efficiency | 8 CFM/W | 7.1 CFM/W |
| Speeds | 2 | 2 |
| Noise | 49.4 dBA | 43.2 dBA |
| Install | ||
| Mount | Ducted | Ducted |
| Damper | R-5 insulated | R-5 insulated |
| Ceiling opening | 14.25 x 22.25 in | 14.25 x 18.25 in |
| Attic vent area needed | 4.2 sq ft | 3.3 sq ft |
| Voltage | 120 V | 120 V |
| Remote or wall control | Yes | Yes |
| App or remote monitoring | No | No |
| Warranty | ||
| Warranty | 10 years | 10 years |