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
The QuietCool Energy Saver ES-4700 RF is the better whole house fan overall, rated 3.6 to 3.0. The QuietCool Energy Saver ES-4700 RF leads on warranty and damper. The AirScape Ventura 3200 wins on efficiency. The QuietCool Energy Saver ES-4700 RF costs $110 less ($1,349 vs $1,459).
AirScape Ventura 3200
A ten-speed ducted fan for a typical home in a mild climate; the uninsulated door makes it a poor fit where winters are cold.
HVACQuick $1,459$1,459
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 Energy Saver ES-4700 RF for warranty (10-year warranty on the motor vs 3-year warranty on the motor) and damper (R-5 insulated damper vs uninsulated louver).
- Choose the AirScape Ventura 3200 for efficiency (10.4 CFM per watt vs 7.4 CFM per watt).
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 | QuietCool Energy Saver ES-4700 RF | AirScape Ventura 3200 |
|---|---|---|
| Overall rating | 3.6/5 | 3.0/5 |
| Value 30% | 51 $437.99 per 1,000 CFM ($1,349, 3,080 CFM) | 49 $453.53 per 1,000 CFM ($1,459, 3,217 CFM) |
| Efficiency 20% | 40 7.4 CFM per watt | 90 10.4 CFM per watt |
| Noise 15% | 50 noise rating not published (neutral score used) | 33 60 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
| QuietCool Energy Saver ES-4700 RF | AirScape Ventura 3200 | |
|---|---|---|
| Airflow | ||
| Airflow, high speed | 3,080 CFM | 3,217 CFM |
| Power, high speed | 415 W | 310 W |
| Efficiency | 7.4 CFM/W | 10.4 CFM/W |
| Speeds | 2 | 10 |
| Noise | - | 60 dBA |
| Install | ||
| Mount | Ducted | Ducted |
| Damper | R-5 insulated | Uninsulated |
| Ceiling opening | 14.25 x 30.25 in | 14.5 x 22.5 in |
| Attic vent area needed | 5.6 sq ft | 4.3 sq ft |
| Voltage | 120 V | 120 V |
| Remote or wall control | Yes | Yes |
| App or remote monitoring | No | - |
| Warranty | ||
| Warranty | 10 years | 3 years |