QuietCool QC ES-1500 Whole House Fan | 1,468 CFM, 61W ECM

The QC ES-1500 Moves 1,468 CFM on 61 Watts Efficiency is the whole argument for this fan. 1,468 CFM on 61 watts works out to 24.07 CFM per watt, which is a different category of running cost from compressor cooling. The ECM motor is what makes that possible. It covers up to 717 sq ft, so it suits a zone or a single floor rather than a whole large house. Pair several small units for zone control instead of one central fan. What Installing an Energy Saver Whole House Fan Involves This is not a plug-in appliance, and that is the honest caveat. It needs a ceiling cut for a 16 x 16 in grille. It also needs at least 2 sq ft of attic venting to exhaust into, or it will just pressurise the attic. Budget one to two hours for the install. It arrives pre-wired with a 20 ft cord. R5 insulated damper doors seal the opening when it is off, so winter heat stays put. Run it at night with windows cracked to flush the day's heat. QuietCool covers it for ten years. Key Features 1,468 CFM on 61 Watts: 24.07 CFM per watt, a fraction of what compressor cooling draws. ECM Motor: The efficiency comes from the motor, not from undersizing the fan. Covers up to 717 sq ft: Sized for a zone or single floor, and can be paired for larger homes. 16 x 16 in Grille: A modest ceiling cut compared with older whole house fans. R5 Insulated Damper Doors: Seal the ceiling opening when off so heat does not escape in winter. 20 ft Pre-Wired Cord: Reaches an attic junction without extra wiring runs. 10-Year Warranty: Long cover, which matters for something built into the ceiling. Technical Specifications Specification Value Airflow 1,468 CFM Power 61 W Efficiency 24.07 CFM/watt Motor ECM Coverage Up to 717 sq ft Grille Size 16 x 16 in Attic Venting Required 2 sq ft minimum Damper R5 insulated doors Cord 20 ft, pre-wired Install Time 1 to 2 hours Warranty 10 years