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
The Spider Farmer 4 in Inline Fan rates 3.4 among 4 in inline duct fans; the Spider Farmer 6 in Inline Fan rates 3.1 among 6 in ones. The Spider Farmer 4 in Inline Fan costs $36 less ($79.99 vs $115.99).
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 6 in Inline Fan
#7 in 6 inFull review
A quiet 6 in EC fan for 4x4 tents, best for owners already using Spider Farmer’s GGS controller.
Amazon $115.99$115.99
Scores side by side
These two sit in different duct size classes (4 in and 6 in), and each is scored against the reference points for its own class, so a rating says how well each does among its own duct size peers. How we rank explains each factor.
| Factor weight | Spider Farmer 4 in Inline Fan | Spider Farmer 6 in Inline Fan |
|---|---|---|
| Overall rating | 3.4/5 | 3.1/5 |
| Value 25% | 49 $39.02 per 100 CFM ($79.99, 205 CFM) | 33 $28.85 per 100 CFM ($115.99, 402 CFM) |
| Efficiency 25% | 51 7.6 CFM per watt (205 CFM, 27 W) | 39 6.5 CFM per watt (402 CFM, 62 W) |
| Airflow 15% | 71 205 CFM through 4 in duct | 76 402 CFM through 6 in duct |
| Noise 15% | 95 26.8 dBA at full speed | 80 32 dBA at full speed |
| Controls 10% | 40 speed controller included | 40 speed controller included |
| Warranty 10% | 0 warranty not published, scored as none | 0 warranty not published, scored as none |
Specifications
| Spider Farmer 4 in Inline Fan | Spider Farmer 6 in Inline Fan | |
|---|---|---|
| Performance | ||
| Duct size | 4 in | 6 in |
| Rated airflow | 205 CFM | 402 CFM |
| Power at full speed | 27 W | 62 W |
| Power figure | Rated power | Rated power |
| Airflow per watt | 7.6 CFM/W | 6.5 CFM/W |
| Price per 100 CFM | $39.02 | $28.85 |
| Noise at full speed | 26.8 dBA | 32 dBA |
| Top speed | 3,000 RPM | - |
| Controls | ||
| Motor | EC | EC |
| Controller | Speed controller with RJ12 port | Speed controller with RJ12 port |
| Speeds | Stepless | Stepless |
| Temperature and humidity control | No | No |
| Phone app | No | No |
| Timer or cycle modes | No | No |
| Build | ||
| Housing | Plastic | Plastic |
| Ingress rating | IP42 | IP42 |
| Voltage | 120 V | - |