# Master Flow WHFS24M Direct Drive Whole House Fan vs CentricAir 3.4: specs and price compared

A sourced, side-by-side comparison of the Master Flow WHFS24M Direct Drive Whole House Fan (Master Flow) and CentricAir 3.4 (CentricAir) 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 | CentricAir 3.4 |
| --- | --- | --- |
| US price | $379.99 | $1449 |
| Brand | Master Flow | CentricAir |
| Airflow (CFM) | 4,500 CFM | 3,242 / 1,409 CFM (high/low, CA Title 24 / HVI-916 rated) |
| Coverage (sq ft) | up to 2,000 sq ft | up to 2,500 sq ft (1-story) / up to 3,400 sq ft (2-story) |
| Speed settings | — | 2 |
| Drive type | direct_drive | ducted |
| Insulated damper | No | Yes |
| Remote or app control | No | Yes |
| Sound level note | — | 49 dBA high / 47 dBA low |
| Motor warranty years | — | 15 |

## Key differences

- Airflow (CFM): Master Flow WHFS24M Direct Drive Whole House Fan 4,500 CFM vs CentricAir 3.4 3,242 / 1,409 CFM (high/low, CA Title 24 / HVI-916 rated)
- Coverage (sq ft): Master Flow WHFS24M Direct Drive Whole House Fan up to 2,000 sq ft vs CentricAir 3.4 up to 2,500 sq ft (1-story) / up to 3,400 sq ft (2-story)
- Drive type: Master Flow WHFS24M Direct Drive Whole House Fan direct_drive vs CentricAir 3.4 ducted
- Insulated damper: Master Flow WHFS24M Direct Drive Whole House Fan No vs CentricAir 3.4 Yes
- Remote or app control: Master Flow WHFS24M Direct Drive Whole House Fan No vs CentricAir 3.4 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)
- CentricAir 3.4: https://www.centricair.com/whole-house-fan-products-and-prices/centricair-3-4/ (centricair.com, verified 2026-08-16)

Canonical: https://frontdeskreview.com/gear/whole-house-fans/master-flow-whfs24m-vs-centricair-3-4/
Cite: Per The Front Desk Review, Master Flow WHFS24M Direct Drive Whole House Fan ($379.99) vs CentricAir 3.4 ($1449) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/whole-house-fans/master-flow-whfs24m-vs-centricair-3-4/
License: CC BY 4.0.