VIVOSUN 4 inch (100 mm) Inline Duct Fan with E42A WiFi-App Controller (EC motor, quiet exhaust)
Reviews
Product description
The essentials
If you run a grow tent, greenhouse setup or a hydroponics system, airflow control stops being “nice to have” and becomes part of keeping conditions stable. This VIVOSUN inline duct fan is designed for that job, and what makes it more than a basic extractor is the included E42A WiFi-app controller approach, which is aimed at helping you manage things remotely and more automatically.
On paper, it ticks a lot of boxes at once: it’s an inline duct fan for moving air through longer runs, it’s described as low-noise, and the controller includes temperature and humidity monitoring plus programming options via the app. The real question is whether you’ll use the smart features, or whether you’d be better off with a simpler, cheaper exhaust fan setup.
What it’s for (and what it helps with)
This inline duct fan is built as an exhaust-style accessory for controlled environments like grow tents, hydroponics rigs and greenhouse rooms. The mixed-flow design is specifically positioned for pushing air across longer distances inside ducting rather than just moving air a short way.
A practical way to think about it: imagine you’ve got a tent with ducting running to the outside and you want the system to respond as temperatures and humidity drift during the day. With the controller described here, you can monitor internal and external changes (with a probe) and then automate fan behaviour through the app.
Key features you’ll actually notice
The headline features are energy saving control, quieter operation, and monitoring/automation.
- Energy-saving & quieter operation: It’s described as controlled by PWM (pulse-width modulation), and the fan is stated to be quiet at 39 dB.
- EC motor for exhaust use: The fan is described as an EC motor exhaust fan, which typically matters if you’re running ventilation regularly rather than occasionally.
- Monitoring built in: The controller is said to include temperature and humidity measurement and support VPD monitoring via the GrowHub E42A platform.
- App control and automation: The E42A controller is WiFi-enabled so you can manage it via an app, including programming stages of growth and setting fan speed/airflow volume.
It’s not perfect, though: the provided info doesn’t cover ducting fittings, exact installation constraints, or any detailed compatibility list for external devices. So if you’re planning a very specific integration with other equipment, you’ll want to double-check the requirements before ordering.
How the automation approach works
A big part of the value here is that you’re not only buying the fan—you’re buying a control method aimed at “hands-off” ventilation. The description suggests you can programme automation across growth stages, including settings for fan speed and airflow volume, and you can adjust on the fly.
There’s also an emphasis on viewing environmental data and using it to guide changes. If you’re the kind of grower who tweaks conditions daily, this may feel like a helpful assistant. If you’re more of a “set-and-forget” ventilation person, you might still benefit, but you may not need the full range of app features.
Where it shines vs where it may feel limited
This is a solid match if you want an inline exhaust fan that supports remote management and environmental monitoring, especially in setups where temperature and humidity swing through the day.
It might not be the best fit if:
- you only need basic ventilation control and don’t care about app-based monitoring or automation
- your setup needs very specific integration details that aren’t covered in the information you’ve got
- you’re expecting a fully comprehensive “one platform for everything” story without checking how your existing equipment will connect
Tech specs
- Name: VIVOSUN Inline Duct Fan with E42A WiFi-App Controller
- Type: Inline duct (exhaust) fan
- Size: 4 inch / 100 mm
- Energy control: PWM (pulse-width modulation)
- Noise level: 39 dB
- Motor type: EC motor
- Capacity: 357 m³/h
- Monitoring: built-in temperature and humidity gauge plus one probe (for internal/external changes)
- Control: WiFi-enabled app control via GrowHub E42A platform (Grow Recipes / programming)
Is it worth it?
Worth considering if you’re running a grow tent, greenhouse accessory space, or hydroponics area and you want quieter inline extraction with the option to monitor and automate ventilation from your phone. It suits users who are happy to work with controller-style setups and want more stability than a manual fan timer.
You may want to skip it if you’re after the simplest possible extractor fan and won’t use the app, monitoring, or programming features—because in that scenario you could end up paying for control depth you don’t actually need.
Quick things to double-check before buying: the 4 inch / 100 mm duct sizing fits your existing ducting and tent ports, you’re happy with a 39 dB noise level for your space, and you understand what the controller can monitor (temperature/humidity and VPD) and what it does with automation in your typical routine.