Quick Summary
The Mars Hydro iFresh is a 4 inch smart inline duct fan with a variable speed controller. It is described as an indoor grow ventilation fan with app control, a probe sensor for temperature and relative humidity, and automated timing and climate-trigger functions.
The main buying checks for this product are the 4 inch size, the control method, and whether the app-based features and sensor-based monitoring suit the way you want to manage ventilation.
Key Details
| Detail | Verified information and buyer relevance |
|---|---|
| Product type | Smart inline duct fan for indoor ventilation. |
| Size | 4 inch. Check that this matches the ducting or space you plan to use. |
| Control | Variable speed controller with app-based remote control. |
| Monitoring | Probe sensor for temperature and relative humidity data shown in the app. |
| Automation | Loop timer and climate-trigger functions are described. |
| Stated airflow | 205 CFM. Compare this with the ventilation level you need. |
| Stated speed | 2600 RPM. This is a useful reference when comparing operating output. |
What to Compare Before Buying
- Size: This model is a 4 inch fan, so confirm it matches your ducting and installation space.
- Control method: Compare whether you want manual speed control, app control, or both.
- Automation: The fan includes loop timing and climate-trigger functions, so check whether those are the features you need.
- Monitoring: The probe sensor displays temperature and relative humidity in the app, which matters if environmental readings are important to you.
- Airflow: The stated airflow is 205 CFM, so compare that figure with the ventilation level you want.
How It Works
The fan is set up as a smart ventilation unit that can be controlled from a smartphone app. The app is described as allowing remote control, alarms, loop timers, and climate-trigger settings. When used with the probe sensor, the app can also show temperature, relative humidity, fan speed and airflow data.
Before You Decide
Check that you want a 4 inch smart inline duct fan rather than a standard manual unit. Confirm the control features, the app-based monitoring, and the 205 CFM airflow against your ventilation needs before choosing an offer.






