AC Infinity CLOUDLINE T4
#3 in 4 inFull review
The S4 fan paired with a temperature and humidity controller and WiFi app. For a small grow tent that should run itself.
Amazon $119$119
The AC Infinity CLOUDLINE T4 is the better inline duct fan overall, rated 3.5 to 3.4. The AC Infinity CLOUDLINE T4 leads on controls and airflow. The Spider Farmer 4 in Inline Fan wins on value. The Spider Farmer 4 in Inline Fan costs $39.01 less ($79.99 vs $119).
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Spider Farmer 4 in Inline Fan
#4 in 4 inFull review
A quiet, efficient 4 in EC fan for small grow tents, priced below the CLOUDLINE S4.
Amazon $79.99$79.99
Which should you buy?
- Choose the AC Infinity CLOUDLINE T4 for controls (speed controller included, temperature and humidity control, phone app, timer or cycle modes vs speed controller included) and airflow (226 CFM through 4 in duct vs 205 CFM through 4 in duct).
- Choose the Spider Farmer 4 in Inline Fan for value ($39.02 per 100 CFM ($79.99, 205 CFM) vs $52.65 per 100 CFM ($119, 226 CFM)).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every 4 in inline duct fan; a clear win is highlighted. How we rank explains each one.
| Factor weight | AC Infinity CLOUDLINE T4 | Spider Farmer 4 in Inline Fan |
|---|---|---|
| Overall rating | 3.5/5 | 3.4/5 |
| Value 25% | 15 $52.65 per 100 CFM ($119, 226 CFM) | 49 $39.02 per 100 CFM ($79.99, 205 CFM) |
| Efficiency 25% | 56 8.1 CFM per watt (226 CFM, 28 W) | 51 7.6 CFM per watt (205 CFM, 27 W) |
| Airflow 15% | 88 226 CFM through 4 in duct | 71 205 CFM through 4 in duct |
| Noise 15% | 97 26 dBA at full speed | 95 26.8 dBA at full speed |
| Controls 10% | 100 speed controller included, temperature and humidity control, phone app, timer or cycle modes | 40 speed controller included |
| Warranty 10% | 25 2-year warranty | 0 warranty not published, scored as none |
Specifications
| AC Infinity CLOUDLINE T4 | Spider Farmer 4 in Inline Fan | |
|---|---|---|
| Performance | ||
| Duct size | 4 in | 4 in |
| Rated airflow | 226 CFM | 205 CFM |
| Static pressure (not scored) | 223 Pa | - |
| Power at full speed | 28 W | 27 W |
| Power figure | Max power draw | Rated power |
| Average power (not scored) | 21 W | - |
| Airflow per watt | 8.1 CFM/W | 7.6 CFM/W |
| Price per 100 CFM | $52.65 | $39.02 |
| Noise at full speed | 26 dBA | 26.8 dBA |
| Top speed | 2,800 RPM | 3,000 RPM |
| Controls | ||
| Motor | EC | EC |
| Controller | Environment controller | Speed controller with RJ12 port |
| Speeds | 10 | Stepless |
| Temperature and humidity control | Yes | No |
| Phone app | Yes | No |
| Timer or cycle modes | Yes | No |
| Build | ||
| Housing | Plastic | Plastic |
| Ingress rating | - | IP42 |
| Voltage | 100-240 V | 120 V |
| Warranty | 2 years | - |