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 rates 3.9 among 3,001 to 5,000 CFM whole house fans; the AirScape Ventura X9 rates 2.5 among over 5,000 CFM ones. The Centric Air QA-Deluxe 6500 costs $650 less ($1,149 vs $1,799).
AirScape Ventura X9
A ten-speed ducted fan for a large home in a mild climate; the uninsulated door makes it a poor fit where winters are cold.
HVACQuick $1,799$1,799
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.
Scores side by side
These two sit in different size classes (3,001 to 5,000 CFM and over 5,000 CFM), and each is scored against the reference points for its own class, so a rating says how well each does among its own size peers. How we rank explains each factor.
| Factor weight | Centric Air QA-Deluxe 6500 | AirScape Ventura X9 |
|---|---|---|
| Overall rating | 3.9/5 | 2.5/5 |
| Value 30% | 89 $256.59 per 1,000 CFM ($1,149, 4,478 CFM) | 68 $345.17 per 1,000 CFM ($1,799, 5,212 CFM) |
| Efficiency 20% | 13 5.8 CFM per watt | 10 5.6 CFM per watt |
| Noise 15% | 63 51 dBA at high speed | 7 68 dBA at high speed |
| Damper 10% | 33 R-5 insulated damper | 0 uninsulated louver |
| Warranty 25% | 100 10-year warranty on the motor | 22 3-year warranty on the motor |
Specifications
| Centric Air QA-Deluxe 6500 | AirScape Ventura X9 | |
|---|---|---|
| Airflow | ||
| Airflow, high speed | 4,478 CFM | 5,212 CFM |
| Power, high speed | 771 W | 925 W |
| Efficiency | 5.8 CFM/W | 5.6 CFM/W |
| Speeds | 2 | 10 |
| Noise | 51 dBA | 68 dBA |
| Install | ||
| Mount | Ducted | Ducted |
| Damper | R-5 insulated | Uninsulated |
| Ceiling opening | 14 x 28 in | 14.5 x 36 in |
| Attic vent area needed | 5.5 sq ft | 7.1 sq ft |
| Voltage | 120 V | 120 V |
| Remote or wall control | Yes | Yes |
| Warranty | ||
| Warranty | 10 years | 3 years |