Centric Air QA-Deluxe 6500
A low-cost ducted fan with an R-5 damper for a typical home, if you accept higher power use than ECM models.
Amazon $1,178 Centric Air $1,149$1,149
The Centric Air QA-Deluxe 6500 is the better whole house fan overall, rated 3.9 to 3.8. The Centric Air QA-Deluxe 6500 leads on value. The Centric Air QA-Deluxe 6500 costs $60 less ($1,149 vs $1,209).
QuietCool Classic CL-5400 RF
A ducted Classic fan with a 10-year warranty for a typical home. It costs less up front than the Energy Saver but draws more power.
Amazon $1,209$1,209
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 Centric Air QA-Deluxe 6500 for value ($256.59 per 1,000 CFM ($1,149, 4,478 CFM) vs $306.08 per 1,000 CFM ($1,209, 3,950 CFM)).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every 3,001 to 5,000 CFM whole house fan; a clear win is highlighted. How we rank explains each one.
| Factor weight | Centric Air QA-Deluxe 6500 | QuietCool Classic CL-5400 RF |
|---|---|---|
| Overall rating | 3.9/5 | 3.8/5 |
| Value 30% | 89 $256.59 per 1,000 CFM ($1,149, 4,478 CFM) | 77 $306.08 per 1,000 CFM ($1,209, 3,950 CFM) |
| Efficiency 20% | 13 5.8 CFM per watt | 20 6.2 CFM per watt |
| Noise 15% | 63 51 dBA at high speed | 63 51.2 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
| Centric Air QA-Deluxe 6500 | QuietCool Classic CL-5400 RF | |
|---|---|---|
| Airflow | ||
| Airflow, high speed | 4,478 CFM | 3,950 CFM |
| Power, high speed | 771 W | 634 W |
| Efficiency | 5.8 CFM/W | 6.2 CFM/W |
| Speeds | 2 | 2 |
| Noise | 51 dBA | 51.2 dBA |
| Install | ||
| Mount | Ducted | Ducted |
| Damper | R-5 insulated | R-5 insulated |
| Ceiling opening | 14 x 28 in | 14.25 x 30.25 in |
| Attic vent area needed | 5.5 sq ft | 6.7 sq ft |
| Voltage | 120 V | 120 V |
| Remote or wall control | Yes | Yes |
| App or remote monitoring | - | No |
| Warranty | ||
| Warranty | 10 years | 10 years |