# Master Flow WHFS24M Direct Drive Whole House Fan vs AirScape 1.7 (1.7 WHF-XR): specs and price compared

A sourced, side-by-side comparison of the Master Flow WHFS24M Direct Drive Whole House Fan (Master Flow) and AirScape 1.7 (1.7 WHF-XR) (AirScape) among whole house fans. Master Flow WHFS24M Direct Drive Whole House Fan is the cheaper of the two at $379.99.

## Side by side

| Spec | Master Flow WHFS24M Direct Drive Whole House Fan | AirScape 1.7 (1.7 WHF-XR) |
| --- | --- | --- |
| US price | $379.99 | $996 |
| Brand | Master Flow | AirScape |
| Airflow (CFM) | 4,500 CFM | 1,712 / 1,000 CFM (high/low) |
| Coverage (sq ft) | up to 2,000 sq ft | up to 1,500 sq ft |
| Speed settings | — | 2 |
| Drive type | direct_drive | direct_drive |
| Insulated damper | No | Yes |
| Remote or app control | No | No |
| Sound level note | — | 55 dBA high / 44 dBA low, measured at 1 meter |
| Motor warranty years | — | 3 |

## Key differences

- Airflow (CFM): Master Flow WHFS24M Direct Drive Whole House Fan 4,500 CFM vs AirScape 1.7 (1.7 WHF-XR) 1,712 / 1,000 CFM (high/low)
- Coverage (sq ft): Master Flow WHFS24M Direct Drive Whole House Fan up to 2,000 sq ft vs AirScape 1.7 (1.7 WHF-XR) up to 1,500 sq ft
- Insulated damper: Master Flow WHFS24M Direct Drive Whole House Fan No vs AirScape 1.7 (1.7 WHF-XR) Yes

## Sources

- Master Flow WHFS24M Direct Drive Whole House Fan: https://www.thelumberyard.com/FAN-WHOLE-HOUSE-24IN-4500CFM-p/6928790.htm (thelumberyard.com, verified 2026-08-16)
- AirScape 1.7 (1.7 WHF-XR): https://airscapefans.com/products/airscape-1-7 (airscapefans.com, verified 2026-08-16)

Canonical: https://frontdeskreview.com/gear/whole-house-fans/master-flow-whfs24m-vs-airscape-1-7/
Cite: Per The Front Desk Review, Master Flow WHFS24M Direct Drive Whole House Fan ($379.99) vs AirScape 1.7 (1.7 WHF-XR) ($996) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/whole-house-fans/master-flow-whfs24m-vs-airscape-1-7/
License: CC BY 4.0.