QuietCool QC CL-4700 Classic whole house fan
The QuietCool QC CL-4700 Classic moves 4,757 CFM on high and 3,586 on low to pull cool outdoor air in and push heat out. It cools homes and grow spaces up to 2,400 square feet. A patented acoustical duct and R5-insulated damper box keep it whisper-quiet at 54 dB. Two speeds draw 533W high and 491W low on 120V.
Quiet two-speed attic ventilation for grow rooms
Growers flush heat from lights and equipment through the attic while drawing in fresh, cooler air. That clears humidity, allergens, and stale air fast and can cut AC cost by 50 to 90% with night cooling. Install hangs in the attic, connects to the duct, and fits a 14.25-by-26.25-inch grille with no framing. R5 magnetic damper doors close when the fan is off. Wire it to a two-speed wall switch for simple control. A 10-year warranty backs it.
Key Features
- 4,757 / 3,586 CFM: High and low speeds for rapid heat removal up to 2,400 sq ft.
- Whisper-Quiet 54 dB: Acoustical duct and R5 damper box cut noise and vibration.
- Two-Speed Control: 533W high / 491W low on a simple wall switch.
- R5 Magnetic Dampers: Seal the opening when the fan is off.
- 14.25 x 26.25 in Grille: Drops in with no framing needed.
- 10-Year Warranty: Backed for long, continuous service.
Technical Specifications
| Specification | Value |
|---|---|
| Type | Whole house / attic ventilation fan |
| Airflow (high) | 4,757 CFM |
| Airflow (low) | 3,586 CFM |
| Power | 533 W high / 491 W low |
| Voltage | 120V |
| Coverage | Up to 2,400 sq ft |
| Noise | 54 dB |
| Grille | 14.25 x 26.25 in |
| Damper | R5 magnetic doors |
| Control | Two-speed wall switch |
| Warranty | 10 years |