VIVOSUN
VIVOSUN T4 4" 210 CFM Inline Fan &Smart Controller, Aerozesh for IndoorGrow
Bottom line: The VIVOSUN T4 4" 210 CFM Inline Fan &Smart Controller ($109.99 on Amazon as of 2026-10-21 10:16 UTC): 210 CFM mixed-flow design pushes air through long duct runs; main trade-off: wi-Fi app and GrowHub account required for the automation features.
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*Price sourced from Amazon.com. Last updated 2026-10-21. Price and availability subject to change.
Pros & Cons
Pros
- ✓ 210 CFM mixed-flow design pushes air through long duct runs
- ✓ EC motor with PWM draws about 30% less power than AC fans
- ✓ Runs as quiet as 28 dB at lower speed settings
- ✓ Included probe reads temp, humidity, and VPD inside and outside the tent
- ✓ Auto-triggers ramp fan speed on your own temp or humidity thresholds
Cons
- ✗ Wi-Fi app and GrowHub account required for the automation features
- ✗ 210 CFM suits small tents; larger rooms need a 6-inch or 8-inch fan
- ✗ Smart control only extends to compatible VIVOSUN GrowHub devices
Manufacturer description
The VIVOSUN T4 is a 4-inch inline duct fan built around an EC motor with PWM control, paired with the GrowHub E42A+ smart controller. It moves 210 CFM through a mixed-flow housing, which gives you long-distance airflow for a grow tent, greenhouse, hydroponic rack, attic, or a ducted HVAC run. VIVOSUN rates the EC motor at roughly 30% better energy efficiency than a comparable AC fan, and operation drops as low as 28 dB at reduced speed. The controller is where this kit separates from a basic speed dial. A bundled probe tracks temperature and humidity and calculates VPD for both inside and…
SpecPicks Verdict
SpecPicks scored VIVOSUN T4 4" 210 CFM Inline Fan &Smart Controller using a rating × review-volume × price-fit model applied to published specs and reviews across the cooling & fans category. VIVOSUN's cooling & fans lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.
Common buyer scenarios for cooling & fans of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.
Frequently Asked Questions
How much air does the VIVOSUN T4 move?
It is rated at 210 CFM through a 4-inch duct, using a mixed-flow impeller design VIVOSUN specifies for powerful, long-distance airflow.
How loud is this inline fan?
VIVOSUN rates operation as low as 28 dB. That figure applies at reduced speed; noise rises as you increase PWM output toward full 210 CFM.
Do I need the app to use the fan?
App control over Wi-Fi is what unlocks scheduling, VPD readouts, Grow Recipes, and auto-triggers. Check the product listing for what the E42A+ controller does standalone.
Can it track VPD for my tent?
Yes. The included temperature and humidity probe feeds the app, which calculates VPD for both inside and outside the tent in real time.
Will it work outside a grow tent?
VIVOSUN lists greenhouses, hydroponic setups, home ventilation, attic cooling, and ducted HVAC as supported applications alongside indoor grow rooms.
Key Features
- Unified Smart Control: Centralize management of all your compatible growing devices through the GrowHub E42A+ platform, transforming complex gardening into a simplified, science-based process for a consistently stable grow environment
- Energy-Efficient & Quiet EC Motor Fan: Featuring a premium EC motor with PWM control, this fan achieves superior energy savings of about 30% (compared to traditional AC fans) and quiet operation as low as 28 dB; Its mixed-flow design ensures powerful, long-distance 210 CFM airflow for maximum ventilation efficiency
- Comprehensive Climate Monitoring: Accurately track your garden's environment using the included probe, which monitors both temperature and humidity; View real-time data and calculate VPD (Vapor Pressure Deficit) for both inside and outside the tent, all within the app
- Fully Automated Growing: E42A+ Controller creates customized, stage-specific schedules (seedling, vegetative, flowering) to automate your equipment fully; Preset light intensity, spectrum, schedules, fan speed, and airflow for complete hands-free operation, with the flexibility to adjust anytime
- App Control & Remote Management: Operate your entire setup from anywhere via Wi-Fi; The dedicated app allows you to monitor real-time data, apply Grow Recipes, adjust device settings on the fly, and expand your controller's capabilities
- Smart Auto-Triggers: Program your devices to react automatically to environmental changes, such as having the fan activate or adjust speed based on custom temperature or humidity thresholds
Full Specifications
| Size | 4" |
|---|---|
| Brand | VIVOSUN |
| Color | Black Pro |
| Speed | 3000 rpm |
| Style | Inline Duct Fan |
| Theme | Gardening |
| Wattage | 20 watts |
| Material | Alloy Steel |
| Room Type | Bedroom |
| Model Name | VIVOSUN inline fan |
| Motor Type | Brushless |
| Unit Count | 1 Count |
| Finish Type | Powder Coated |
| Noise Level | 42 db |
| Part Number | VSV-AZT6E42AK |
| Reusability | High |
| Switch Type | Touchpad |
| Connectivity | WiFi |
| Model Number | VSV-AZT4E42AP |
| Power Source | Corded Electric |
Ready to buy?
VIVOSUN T4 4" 210 CFM Inline Fan &Smart Controller, Aerozesh for IndoorGrow is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-10-21. Price and availability subject to change.
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