# QuietCool Stealth Pro 3.3 Whole House Fan (QC STL PRO-3.3): specs and price

**Price (US):** Not published (No published consumer MSRP found; the PSC-motor Stealth Pro 3.3 is sold mainly through HVAC/electrical distributors (Lennox, Platt, Rexel, Gexpro) without list retail pricing), as of 2026-08-16.
**Brand:** QuietCool
**Deskmark:** Platinum Deskmark — pay-blind category standing 95/100, #1 of 10 in class (independent, computed from sourced data, never for sale).

## Specifications

| Spec | Value |
| --- | --- |
| Price (US) | Not published |
| Brand | QuietCool |
| Airflow (CFM) | 3,123 / 2,030 CFM (high/low) |
| Coverage (sq ft) | up to 1,550 sq ft |
| Speed settings | 2 |
| Drive type | ducted |
| Insulated damper | Yes |
| Remote or app control | No |
| Sound level note | 48 dBA high / 42 dBA low |
| Motor warranty years | 15 |

## Where it stands

On the spec sheet, its speed settings of 2 is the highest of the 10, and its motor warranty years of 15 is the highest of the 9.

## Frequently asked questions

**How much does the QuietCool Stealth Pro 3.3 Whole House Fan (QC STL PRO-3.3) cost?**

The QuietCool Stealth Pro 3.3 Whole House Fan (QC STL PRO-3.3) has no published US price as of 2026-08-16.

**What are the QuietCool Stealth Pro 3.3 Whole House Fan (QC STL PRO-3.3)'s key specs?**

QuietCool Stealth Pro 3.3 Whole House Fan (QC STL PRO-3.3) (QuietCool): airflow cfm 3,123 / 2,030 CFM (high/low), coverage sqft up to 1,550 sq ft, speed settings 2, drive type ducted, insulated damper Yes. Full sourced spec sheet verified 2026-08-16.

Source: https://m.lennoxpros.com/quietcool-stl-pro-33-whole-house-fan/p/Y9272 (m.lennoxpros.com, accessed 2026-08-16)
Canonical: https://frontdeskreview.com/product/whole-house-fans/quietcool-stealth-pro-3-3/
License: CC BY 4.0. Price history: https://frontdeskreview.com/data/price-history.jsonl