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
4 in205 CFM7.6 CFM/W26.8 dBA
2.7/5
A very quiet 4 in fan for a bedroom closet or a small tent where noise matters more than airflow.
- 141 CFMAirflow
- 21 WPower
- 18 dBANoise
- ECMotor
Check price at Amazon$89.99
Price checked November 9, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- The quietest rated fan here (18 dBA)
- Steel housing and a 2-year warranty
Cons
- Less airflow than most 4 in fans, at a higher price per CFM
How it scores
The rating comes from 6 measured or published factors, each scored 0-100 against fixed reference points for its duct size. How we rank explains each one.
Specifications
| Model number | ECMF-100 |
|---|---|
| Performance | |
| Duct size | 4 in |
| Rated airflow | 141 CFM |
| Power at full speed | 21 W |
| Power figure | Max power draw |
| Airflow per watt | 6.7 CFM/W |
| Price per 100 CFM | $63.82 |
| Noise at full speed | 18 dBA |
| Controls | |
| Motor | EC |
| Controller | Variable speed controller |
| Speeds | Stepless |
| Temperature and humidity control | No |
| Phone app | No |
| Timer or cycle modes | No |
| Build | |
| Housing | Metal |
| Ingress rating | IPX4 |
| Warranty | 2 years |
Alternatives in this duct size
Hon&Guan PRO 4 in Inline Fan
#5 in 4 inFull review
A low-cost 4 in EC fan with strong rated airflow. Its power draw is not published, which keeps it below documented rivals.
Amazon $63.99$63.99
4 in212 CFM28 dBA
AC Infinity CLOUDLINE A4
#6 in 4 inFull review
The budget member of the CLOUDLINE 4 in range, with the same controller and build but less airflow than the S4. Worth it for its higher static pressure behind a small carbon filter.
Amazon $79.99$79.99
4 in165 CFM4.7 CFM/W29 dBA
Compare
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