QuietCool · Updated August 2026
QuietCool Stealth Pro 3.3 Whole House Fan (QC STL PRO-3.3): full specs
QuietCool Stealth Pro 3.3 Whole House Fan (QC STL PRO-3.3). Every price and spec below is linked to its source and dated — no guesses.
Source: m.lennoxpros.com verified verify in ledger
The QuietCool Stealth Pro 3.3 Whole House Fan (QC STL PRO-3.3) has no published US price yet. It earns a Platinum Deskmark — 95/100 pay-blind standing, #1 of 10 in class.
Verified Aug 16, 2026 · figures linked to their source in the table below
Cheapest whole house fans: Master Flow WHFS24M Direct Drive Whole House Fan — $379.99
Is the QuietCool Stealth Pro 3.3 Whole House Fan (QC STL PRO-3.3) a good buy?
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.
Specifications
| 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 |
|---|---|
| Brand | QuietCool |
| Released | — |
| 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 |
Source: m.lennoxpros.com (verified 2026-08-16). Specs re-verified 2026-08-16 on Lennox's HVAC-distributor page for the QC STL PRO-3.3 PSC-motor version: 3,123/2,030 CFM, up to 1,550 sq ft, 48/42 dBA, 2-speed, 15-year warranty. Distinct from the newer ECM 'X' variant which adds wireless remote as standard. No consumer MSRP verifiable from a manufacturer or major retailer, so price left null rather than estimated.
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.
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