# Master Flow 4500 CFM 24 in. Direct Drive Whole House Fan with Shutter

**Brand:** [Master Flow](https://shop.coreranger.com/brands/Master%20Flow)
**SKU:** WHFS24M
**Price:** $345.32 · in stock
**URL:** https://shop.coreranger.com/product/master-flow-4500-cfm-24-in-direct-drive-whole-house-fan-with-shutter-100018252

## Specifications

| Spec | Value |
|---|---|
| Model # | WHFS24M |
| Features | Speed Control |
| Drive Type | Direct Drive |
| Internet # | 100018252 |
| Returnable | 90-Day |
| Store SKU # | 432659 |
| Color Family | Metallic |
| Airflow (CFM) | 4500 |
| Horsepower (hp) | 1/4 |
| Cut-Out Width (in.) | 26.5 in |
| Product Depth (in.) | 28 in |
| Product Width (in.) | 28 in |
| Product Height (in.) | 6.5 in |
| Product Weight (lb.) | 35 lb |
| Coverage Area (Sq.Ft) | 2500 |
| Manufacturer Warranty | 10-year Parts Limited Warranty 5-year Labor Limited Warranty |
| Decibel (Sound) Rating | 01-Not Measured |
| Max. Motor Speed (RPM) | 1075 RPM |

## Description

The GAF Master Flow 4500 CFM 24 in. Direct Drive Whole-House Fan is a smart energy saver for any home in a climate where air conditioning costs are a concern. It allows you to beat the heat by forcing hot air out of your home through your attic space while bringing in cooler outside air through your windows and doors. This unit comes with a white shutter and features a low-vibration, direct drive mechanism for reliable performance. A minimum 1100 sq. ft. of attic space with a minimum of 1008 sq. in. of net free area attic exhaust is required for proper operation.

• Direct drive motor with included 2-speed pull chain operation
• 10-year parts limited warranty; 5-year labor limited warranty
• Maximum house size for optimum performance: 2500 sq. ft.