iPower 4 in 195 CFM Inline Fan Kit - Quiet Ventilation for 4x4 Grow

In this review the iPower 4 in 195 CFM Inline Fan Kit is evaluated as a compact ventilation solution for small grow tents and hobby hydroponic setups. The bottom line: it is aimed at growers who need a quiet, straightforward exhaust kit with a carbon filter and simple controls; the single biggest reason to buy is the complete kit value - fan, 4 in carbon filter, 8 ft ducting, clamps, rope hangers and an easy variable speed controller bundled together.

Key Features

• Compact 4 in fan: The 195 CFM, 28W inline fan offers strong airflow for 4 ft x 4 ft tents while drawing only 0.45A.
• Integrated carbon filter: The 4 in x 12 in filter uses Australian RC412 activated carbon and a 50 mm carbon layer to improve odor capture compared with thin filters.
• Complete ducting kit: The 4 in diameter, 8 ft aluminum foil + PET ducting and two stainless steel clamps make installation fast and secure.
• Variable speed control: A simple 3-setting controller (OFF, HIGH, MED, LOW) lets you tune airflow and noise without complex wiring.
• Rope hanger and clamps included: The adjustable ratchet clip rope hangers support up to 150 lbs and the metal clamps ensure tight flange connections.

Who It's For

This kit is best for hobby growers, small indoor gardeners and anyone with a 4 ft x 4 ft tent or similar small grow space who wants an all-in-one ventilation pack that is easy to set up. It suits users who prioritize quiet operation, since the fan operates around 30 dB and the controller allows reduced speed to lower noise.

It is less appropriate for large commercial rooms or setups needing very high CFM or advanced automation; if you need variable speed control via a thermostat or high-CFM ventilation for multi-tent rooms, consider higher-capacity or controller-compatible units instead.

Pros & Cons

Pros

• Good kit value with fan, carbon filter, ducting, clamps, rope hangers and a monitor included.
• Quiet operation and modest power draw make it energy efficient for small tents.
• Filter uses a thick 50 mm carbon layer and pre-filter to improve odor handling over thin filters.
• Easy to install thanks to included clamps and ratchet rope hangers rated to 150 lbs.

Cons

• Some users report mixed results on complete odor removal, so it may not eliminate strong smells entirely.
• Fan strength is solid for small tents but can feel limited if you expect very high airflow for larger spaces.

Specifications

Fan size	4 in
Airflow	195 CFM (fan), 220 CFM (filter)
Power	28 W, 0.45 A, 120 V, 60 Hz
Fan speed / noise	2500 RPM / ~30 dB
Carbon filter	4 in x 12 in, 50 mm carbon layer, RC412 activated carbon
Ducting	4 in diameter x 8 ft length, aluminum foil + PET
Included accessories	2 metal clamps, variable speed controller, rope hangers, temp & humidity monitor

Our Verdict

The iPower 4 in 195 CFM Inline Fan Kit is a strong value for hobby growers who want an easy, quiet ventilation solution with a capable carbon filter and every accessory needed to install it. It balances low noise, compact power draw and practical accessories, making it a good buy for single-tent setups, though users with heavy odor loads or larger rooms may want higher-capacity options.

Frequently Asked Questions

Is the fan noisy?
The fan is rated around 30 dB and is generally quiet at lower controller settings; noise increases on high but remains reasonable for small tents.

Will the carbon filter remove strong odors?
The 50 mm carbon layer and RC412 carbon improve odor capture, but very strong smells may not be eliminated completely and results vary by load.

Does the kit include everything to mount and run it?
Yes, the package includes fan, carbon filter, 8 ft ducting, 2 metal clamps, variable speed controller, ratchet rope hangers and a temperature/humidity monitor.