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
The Hon&Guan PRO 4 in Inline Fan rates 3.2 among 4 in inline duct fans; the Hon&Guan 6 in EC Inline Fan HI-150EC rates 3.1 among 6 in ones. The Hon&Guan PRO 4 in Inline Fan costs $36 less ($63.99 vs $99.99).
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.
Hon&Guan 6 in EC Inline Fan HI-150EC
#5 in 6 inFull review
A high-output 6 in fan for long duct runs or a big filter where noise is not a concern.
Amazon $99.99$99.99
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 | Hon&Guan PRO 4 in Inline Fan | Hon&Guan 6 in EC Inline Fan HI-150EC |
|---|---|---|
| Overall rating | 3.2/5 | 3.1/5 |
| Value 25% | 78 $30.18 per 100 CFM ($63.99, 212 CFM) | 64 $21.32 per 100 CFM ($99.99, 469 CFM) |
| Efficiency 25% | 0 power draw not published, scored as the lowest | 34 6.1 CFM per watt (469 CFM, 77 W) |
| Airflow 15% | 77 212 CFM through 4 in duct | 100 469 CFM through 6 in duct |
| Noise 15% | 91 28 dBA at full speed | 14 55 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
| Hon&Guan PRO 4 in Inline Fan | Hon&Guan 6 in EC Inline Fan HI-150EC | |
|---|---|---|
| Performance | ||
| Duct size | 4 in | 6 in |
| Rated airflow | 212 CFM | 469 CFM |
| Power at full speed | - | 77 W |
| Power figure | - | Rated power |
| Airflow per watt | - | 6.1 CFM/W |
| Price per 100 CFM | $30.18 | $21.32 |
| Noise at full speed | 28 dBA | 55 dBA |
| Top speed | - | 4,300 RPM |
| Controls | ||
| Motor | EC | EC |
| Controller | Stepless speed controller | Variable speed controller |
| Speeds | Stepless | Stepless |
| Temperature and humidity control | No | No |
| Phone app | No | No |
| Timer or cycle modes | No | No |
| Build | ||
| Housing | Metal | Plastic |
| Ingress rating | IP42 | IP44 |
| Voltage | - | 100-120 V |