VIVOSUN R6 6 in Inline Fan
#3 in 6 inFull review
A low-cost 6 in fan for bathroom, basement or tent exhaust when running cost and filter performance matter less than price.
Amazon $63.99$63.99
The VIVOSUN R6 6 in Inline Fan is the better inline duct fan overall, rated 3.2 to 2.4. The VIVOSUN R6 6 in Inline Fan leads on value, airflow and controls. The VIVOSUN R6 6 in Inline Fan costs $137.01 less ($63.99 vs $201).
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.
Fantech FG 6
#9 in 6 inFull review
A code-approved metal fan for bathroom, kitchen or radon exhaust where a contractor wants a long-lived, listed unit.
Amazon $201$201
Which should you buy?
- Choose the VIVOSUN R6 6 in Inline Fan for value ($16.41 per 100 CFM ($63.99, 390 CFM) vs $65.90 per 100 CFM ($201, 305 CFM)), airflow (390 CFM through 6 in duct vs 305 CFM through 6 in duct) and controls (speed controller included vs no controller included).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every 6 in inline duct fan; a clear win is highlighted. How we rank explains each one.
| Factor weight | VIVOSUN R6 6 in Inline Fan | Fantech FG 6 |
|---|---|---|
| Overall rating | 3.2/5 | 2.4/5 |
| Value 25% | 91 $16.41 per 100 CFM ($63.99, 390 CFM) | 0 $65.90 per 100 CFM ($201, 305 CFM) |
| Efficiency 25% | 0 power draw not published, scored as the lowest | 15 4.4 CFM per watt (305 CFM, 70 W) |
| Airflow 15% | 70 390 CFM through 6 in duct | 28 305 CFM through 6 in duct |
| Noise 15% | 74 34 dBA at full speed | 50 full-speed noise not published (neutral score used) |
| Controls 10% | 40 speed controller included | 0 no controller included |
| Warranty 10% | 0 warranty not published, scored as none | 100 5-year warranty |
Specifications
| VIVOSUN R6 6 in Inline Fan | Fantech FG 6 | |
|---|---|---|
| Performance | ||
| Duct size | 6 in | 6 in |
| Rated airflow | 390 CFM | 305 CFM |
| Power at full speed | - | 70 W |
| Power figure | - | Rated power |
| Airflow per watt | - | 4.4 CFM/W |
| Price per 100 CFM | $16.41 | $65.90 |
| Noise at full speed | 34 dBA | - |
| Top speed | 2,450 RPM | 2,703 RPM |
| Controls | ||
| Motor | - | AC |
| Controller | Stepless speed controller | None included |
| Speeds | Stepless | - |
| Temperature and humidity control | No | No |
| Phone app | No | No |
| Timer or cycle modes | No | No |
| Build | ||
| Housing | Plastic | Metal |
| Ingress rating | - | IP44 |
| Voltage | - | 120 V |
| Warranty | - | 5 years |