Centric Air 2.7
An efficient ducted fan with a 15-year motor warranty for a small home or one floor.
Amazon $1,249$1,249
The Centric Air 2.7 rates 3.9 among up to 3,000 CFM whole house fans; the QuietCool Energy Saver ES-4700 RF rates 3.6 among 3,001 to 5,000 CFM ones. The Centric Air 2.7 costs $100 less ($1,249 vs $1,349).
QuietCool Energy Saver ES-4700 RF
The efficient version of QuietCool’s ducted fan for a typical home, with a very low-power low speed for running all night.
Amazon $1,349$1,349
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 (up to 3,000 CFM and 3,001 to 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 2.7 | QuietCool Energy Saver ES-4700 RF |
|---|---|---|
| Overall rating | 3.9/5 | 3.6/5 |
| Value 30% | 47 $461.06 per 1,000 CFM ($1,249, 2,709 CFM) | 51 $437.99 per 1,000 CFM ($1,349, 3,080 CFM) |
| Efficiency 20% | 73 9.4 CFM per watt | 40 7.4 CFM per watt |
| Noise 15% | 70 49 dBA at high speed | 50 noise rating not published (neutral score used) |
| Damper 10% | 33 R-5 insulated damper | 33 R-5 insulated damper |
| Warranty 25% | 100 15-year warranty on the motor | 100 10-year warranty on the motor |
Specifications
| Centric Air 2.7 | QuietCool Energy Saver ES-4700 RF | |
|---|---|---|
| Airflow | ||
| Airflow, high speed | 2,709 CFM | 3,080 CFM |
| Power, high speed | 288 W | 415 W |
| Efficiency | 9.4 CFM/W | 7.4 CFM/W |
| Speeds | 2 | 2 |
| Noise | 49 dBA | - |
| Install | ||
| Mount | Ducted | Ducted |
| Damper | R-5 insulated | R-5 insulated |
| Ceiling opening | 14 x 24 in | 14.25 x 30.25 in |
| Attic vent area needed | 3.2 sq ft | 5.6 sq ft |
| Voltage | 120 V | 120 V |
| Remote or wall control | Yes | Yes |
| App or remote monitoring | - | No |
| Warranty | ||
| Warranty | 15 years | 10 years |