The QuietCool CL-7000 whole house fan moves up to 6,924 CFM, its patented attic-hung ducted design keeping motor noise out of the room while cooling homes and grow rooms up to 3,470 sq ft. This ducted whole house fan is QuietCool's XXL Classic build, running a 2-speed 120 VAC motor for fast, high-volume heat exchange.
QuietCool CL-7000 Whole House Fan Built for High-Volume Air Exchange
The QuietCool CL-7000 whole house fan is the XXL model in the Classic line, hanging its motorhead and a patented self-contained duct from the attic rafters on a barometric R5 damper box that isolates vibration and hum from the room below. On high it moves 6,924 CFM at 1,147 W, and low speed still pushes 5,518 CFM at 794 W — enough to fully exchange the air in the largest spaces. Running on 120 VAC and covering up to 3,470 sq ft at 2 CFM per square foot, it suits big grow rooms, lung rooms, and whole homes that smaller units can't keep up with.
Ducted Whole House Fan That Drops In Without Framing
As a ducted whole house fan, the CL-7000 uses a 24-inch, 9-foot duct and a 14 1/4" x 36 1/4" ceiling opening that fits 16" or 24" on-center joists with no framing or joist cutting. Growers running multi-light rooms typically start it on high after lights-out with windows cracked to sweep cool night air across the canopy, then drop to low to hold temps, letting the R5 dampers seal the ceiling against attic air when it's off. It wires to an 8-hour electronic timer, a Hi-Low-Off switch, or Wi-Fi smart control (sold separately). Because it moves so much air, the layout calls for a minimum 9.24 sq ft of net free attic venting to exhaust efficiently.
Key Features
- XXL 6,924 CFM airflow: The largest fan in the Classic line clears heat from spaces smaller units can't keep up with, holding 5,518 CFM even on low.
- Two-speed 120V motor: High and low stages let you clear peak heat fast, then settle into steady background exchange.
- Quiet ducted attic design: The patented self-contained duct and attic-mounted motor keep vibration and hum out of the room below.
- Covers up to 3,470 sq ft: Sized for big grow rooms, lung rooms, and whole homes at the recommended 2 CFM per square foot.
- No-framing retrofit install: Fits 16" or 24" on-center joists with no framing or joist cutting, using a 14 1/4" x 36 1/4" ceiling opening.
- R5 dampers, 10-year warranty: Insulated barometric dampers seal the ceiling when idle, and a decade of coverage backs continuous duty.
Specifications
| Spec | Details |
|---|---|
| Motor Voltage | 120 VAC, 60 Hz |
| Energy Use | Hi: 1,147 Watts / Low: 794 Watts |
| Air Flow | Hi: 6,924 CFM / Low: 5,518 CFM |
| Square Foot Coverage @ 2 CFM per SQ FT | Up to 3,470 SQ FT |
| Number of Speeds | 2 |
| Duct Diameter | 24" |
| Duct Length | 9 feet |
| Motor Head Diameter | 24 1/2" |
| Motor Head Length | 13 1/2" |
| Dampers | Barometric Pressurized R5 Dampers |
| Controls (not included) | 8-Hour Electronic Timer and Hi-Low-Off Switch or Wi-Fi Smart Control |
| Warranty | 10 Years |
| Framing | None required |
| Joist Cutting | None required; fits 16" or 24" on center |
| Minimum Suggested Attic Venting | 9.24 SQ FT net free area |
| Ceiling Rough Opening | 14 1/4" x 36 1/4" |
| Removable Grille Outside Dimension | 16" x 38" |