VIVOSUN AeroZesh T4
#1 in 4 inFull review
A very efficient 4 in EC fan with a 10-speed controller and on/off cycle modes, at a lower price than the CLOUDLINE S4.
Amazon $71.99$71.99
The VIVOSUN AeroZesh T4 is the better inline duct fan overall, rated 3.9 to 2.7. The VIVOSUN AeroZesh T4 leads on value, airflow and controls. The TerraBloom ECMF-100 4 in EC Fan wins on noise. The VIVOSUN AeroZesh T4 costs $18 less ($71.99 vs $89.99).
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.
TerraBloom ECMF-100 4 in EC Fan
#7 in 4 inFull review
A very quiet 4 in fan for a bedroom closet or a small tent where noise matters more than airflow.
Amazon $89.99$89.99
Which should you buy?
- Choose the VIVOSUN AeroZesh T4 for value ($34.28 per 100 CFM ($71.99, 210 CFM) vs $63.82 per 100 CFM ($89.99, 141 CFM)), airflow (210 CFM through 4 in duct vs 141 CFM through 4 in duct) and controls (speed controller included, timer or cycle modes vs speed controller included).
- Choose the TerraBloom ECMF-100 4 in EC Fan for noise (18 dBA at full speed vs 28 dBA at full speed).
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 | VIVOSUN AeroZesh T4 | TerraBloom ECMF-100 4 in EC Fan |
|---|---|---|
| Overall rating | 3.9/5 | 2.7/5 |
| Value 25% | 64 $34.28 per 100 CFM ($71.99, 210 CFM) | 0 $63.82 per 100 CFM ($89.99, 141 CFM) |
| Efficiency 25% | 83 10.5 CFM per watt (210 CFM, 20 W), from a power figure labeled average | 41 6.7 CFM per watt (141 CFM, 21 W) |
| Airflow 15% | 75 210 CFM through 4 in duct | 18 141 CFM through 4 in duct |
| Noise 15% | 91 28 dBA at full speed | 100 18 dBA at full speed |
| Controls 10% | 55 speed controller included, timer or cycle modes | 40 speed controller included |
| Warranty 10% | 25 2-year warranty | 25 2-year warranty |
Specifications
| VIVOSUN AeroZesh T4 | TerraBloom ECMF-100 4 in EC Fan | |
|---|---|---|
| Performance | ||
| Duct size | 4 in | 4 in |
| Rated airflow | 210 CFM | 141 CFM |
| Power at full speed | 20 W | 21 W |
| Power figure | Labeled average | Max power draw |
| Airflow per watt | 10.5 CFM/W | 6.7 CFM/W |
| Price per 100 CFM | $34.28 | $63.82 |
| Noise at full speed | 28 dBA | 18 dBA |
| Top speed | 3,000 RPM | - |
| Controls | ||
| Motor | EC | EC |
| Controller | 10-speed controller with cycle modes | Variable speed controller |
| Speeds | 10 | Stepless |
| Temperature and humidity control | No | No |
| Phone app | No | No |
| Timer or cycle modes | Yes | No |
| Build | ||
| Housing | Plastic | Metal |
| Ingress rating | IP44 | IPX4 |
| Voltage | 110-240 V | - |
| Warranty | 2 years | 2 years |