The Quietcool QC-4500 (U S Patent Pending) is called the Quiet Giant. It, like it's smaller brother the  QC-1500, is an innovative whole house fan that delivers superior performance with 4,500 cubic feet per minute of airflow while operating almost silently. It is mounted up in the attic and connected to an attractive ceiling grill with two patented acoustical insulated flexible ducts. This design eliminates all vibration, rattle, and noise so common to all other whole house fans. It is so quiet in operation that when installed in a bedroom, persons are able to sleep without being able to hear them.
It can be installed almost anywhere in the ceiling as long as there is an attic above. It fits between 16" on center framing, requires no carpentry work to install, and takes less than half the time to install as a conventional whole  house fan. It comes with two separate motors and ducts, allowing for two-speed operation by running only one motor or both motors. Each motor has insulated, positive closing damper doors that prevent the intrusion of attic air back into the house when they are not in operation. |
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| QC-4500 Specifications |
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| Motor Voltage |
120 V. AC 60 Hz. |
| Motor Amperage |
2.5 Amps Low Speed
5.0 Amps High Speed |
| Power Consumption |
300 Watts Low Speed
600 Watts High Speed |
| Motor Speed |
1,560 RPM |
| Air Flow @ 0.1" SP |
2,750 CFM Low Speed
4,500 CFM High Speed |
| Sound Level in Room |
0.6 sones |
| R Value at Closed Damper |
R 4.2 |
| Ceiling Rough Opening |
14" x 22 " |
| Intake Grill Color |
White |
| Shipping Weight |
60 lbs. |
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