Best Greenhouse Exhaust Fans: Match the Fan to the System

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The best greenhouse exhaust fan is the one that fits a defined airflow need, replacement-air path, control strategy, wall opening, power supply, and greenhouse environment. Based on current manufacturer documentation, the AC Infinity AIRLIFT T10 is the strongest fit here for integrated smart controls, the iLIVING ILG8SF12V-ST for a simpler thermostat-and-speed package, and the VES-Artex 119433 for a higher airflow band with published performance at two pressure points. These are fit-based recommendations, not hands-on rankings.

My Greenhouse Lab did not buy, install, measure, noise-test, or durability-test these fans. Exact US-market model pages and manuals were checked on August 16, 2026. Prices, retailer ratings, coverage claims, and affiliate links are intentionally excluded.

Pass the Purchase Readiness Gate first

1. Required airflow: Use the greenhouse fan sizing guide or ventilation calculator before comparing model CFM.
2. Replacement air: Confirm a usable inlet assembly with the intake vent sizing guide.
3. Air path: Make sure intake air crosses the occupied zone; the exhaust-fan placement guide owns that decision.
4. Controls: Decide whether you need fixed operation, thermostat control, humidity logic, variable speed, schedules, or app access.
5. Opening and structure: Verify the exact rough opening, wall support, shutter clearance, guard, and weather exposure from current documents.
6. Power and service: Confirm voltage, current, cord/control arrangement, listing, local requirements, and who will perform any work outside safe homeowner scope.

If an existing system runs but underperforms, use the ventilation troubleshooting guide before buying a larger fan. A restricted opening, shortcut path, control problem, or outdoor-load limit can make replacement-first shopping wasteful.

Greenhouse exhaust fan shortlist

Exact model	Best fit in this shortlist	Published airflow	Control package	Important limit
AC Infinity AIRLIFT T10 AC-ALT10	Integrated temperature, humidity, schedule, and app control	631 CFM	Included smart controller; Wi-Fi app connection	67 dBA is manufacturer data, not our noise test; 10.78 × 10.78 in required opening must fit
iLIVING 12-inch Thermospeed ILG8SF12V-ST	Basic thermostat plus variable-speed control	960 CFM	Thermospeed controller; automatic shutters	Manufacturer page lists conflicting RPM values; verify current manual before ordering
VES-Artex 20-inch EC 119433	Higher airflow band and published pressure-point comparison	2,836 CFM at 0.0; 2,349 CFM at 0.1 static pressure	Variable-speed EC motor	20.5 × 20.5 in rough opening and 115 V, 3.4/3.5 A data require exact project verification

Best fit for integrated smart controls: AC Infinity AIRLIFT T10

The AIRLIFT T10, model AC-ALT10, is the clearest fit when one package needs temperature and humidity programming, timers, scheduling, minimum-speed logic, alarms, and app access. AC Infinity lists 631 CFM, a 13 × 13 × 7.79-inch fan body, a 10.78 × 10.78-inch required mounting hole, 67 dBA, and IP44 resistance. Check the current AIRLIFT T10 specifications.

Choose it when: control integration matters and 631 published CFM fits the already-calculated requirement. Skip it when: the required operating airflow exceeds its suitable range, the opening cannot fit, app-connected control adds no value, or the listed sound level conflicts with the site. The IP44 statement is a manufacturer rating, not permission to ignore location, enclosure, manual, or electrical requirements.

Best fit for basic thermostat and speed control: iLIVING ILG8SF12V-ST

iLIVING lists model ILG8SF12V-ST at 960 CFM, 65 watts, 115 volts, 0.6 amp, and 1/20 horsepower, with a Thermospeed thermostat/variable-speed controller, automatic aluminum shutters, and UL/cUL listing. The same product page publishes conflicting RPM values, so this shortlist does not use RPM as a decision point. Check the current iLIVING model page and manual.

Choose it when: a straightforward thermostat and manual speed range fit the control plan and its documented airflow/opening fit the system. Skip it when: humidity logic, remote monitoring, or a verified pressure-performance curve is required. Do not size a greenhouse from the manufacturer’s square-foot coverage language; greenhouse load, intake, restrictions, and operating point remain separate.

Best fit for a higher airflow band: VES-Artex 119433

VES-Artex identifies item 119433 as a 20-inch variable-speed EC shutter fan used in greenhouse applications. Its 2026 catalog lists 2,836 CFM at 0.0-inch static pressure and 2,349 CFM at 0.1 inch, along with 115 volts, 3.4/3.5 amps, 1,620 RPM, and a 20.5 × 20.5-inch rough opening. Read the greenhouse product note and confirm the current catalog data.

Choose it when: the required airflow falls in this higher band and published pressure-point data, opening size, power, controls, structure, and intake can all be reconciled. Skip it when: a smaller unit satisfies the design, the wall or inlet path cannot support the assembly, or the project lacks qualified review for the larger opening and electrical scope. The two catalog airflow points help comparison; they still do not predict the exact installed operating point.

Verify the exact model before ordering

• Record exact model/item number and document date.
• Compare required airflow with manufacturer data at a relevant resistance, not blade diameter.
• Record rough opening, total dimensions, shutter travel, guard, cord, controller, and sensor placement.
• Confirm intake free area and the complete path for every operating stage.
• Check voltage, current, listing, environmental rating, manual warnings, local requirements, and service access.
• Write unresolved contradictions—such as conflicting RPM—rather than choosing the convenient value.

A fit-first shortlist can reduce bad purchases, but it cannot replace exact equipment documents or project-specific review. If none of these models fits all six gates, the correct result is no recommendation yet, not the closest fan by CFM. Readers considering an off-grid or battery-backed alternative can use the solar greenhouse fan calculator to screen energy assumptions before comparing a different system path.

Sources and methodology

This guide compares exact products from current official manufacturer pages, manuals, and catalogs, then applies the site’s Extension-backed ventilation-system framework. It does not use retailer rankings, owner-review counts, affiliate commission, or original testing. Product specifications and US availability were checked August 16, 2026; verify current documents before purchase because models and specifications can change.