MaxxAir Maxxfan Plus 4000K
#6 in Open lidFull review
For owners who want strong two way airflow and a thermostat without paying for a motorized lid. Pair it with a separate cover if it has to run in rain.
Amazon $253.31$253.31
The MaxxAir Maxxfan Plus 4000K is the better RV roof vent fan overall, rated 3.5 to 3.1. The MaxxAir Maxxfan Plus 4000K leads on speeds. The MaxxAir Maxxfan Plus 4000K costs $17.90 less ($253.31 vs $271.21).
MaxxAir Maxxfan Plus 4002K
#9 in Open lidFull review
For buyers who find it cheaper than the 10 speed Plus 4000K at the time of purchase; otherwise the 4000K does the same job with finer speed control.
Amazon $271.21$271.21
Prices were last checked November 2, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the MaxxAir Maxxfan Plus 4000K for speeds (10 speeds vs 4 speeds).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every open lid RV roof vent fan; a clear win is highlighted. How we rank explains each one.
| Factor weight | MaxxAir Maxxfan Plus 4000K | MaxxAir Maxxfan Plus 4002K |
|---|---|---|
| Overall rating | 3.5/5 | 3.1/5 |
| Price 25% | 38 $253.31 | 32 $271.21 |
| Airflow 15% | 92 900 CFM on high | 92 900 CFM on high |
| Speeds 10% | 100 10 speeds | 14 4 speeds |
| Features 25% | 45 reversible, thermostat | 45 reversible, thermostat |
| Warranty 25% | 50 2-year warranty | 50 2-year warranty |
Specifications
| MaxxAir Maxxfan Plus 4000K | MaxxAir Maxxfan Plus 4002K | |
|---|---|---|
| Fan | ||
| Airflow | 900 CFM | 900 CFM |
| Speeds | 10 | 4 |
| Blade | 12 in | 12 in |
| Reversible | Yes | Yes |
| Lid and controls | ||
| Rain cover | No | No |
| Powered lid | No | No |
| Rain sensor | No | No |
| Thermostat | Yes | Yes |
| Remote | No | No |
| Light | No | No |
| Fit and build | ||
| Roof thickness | 2 to 6.5 in | 2 to 6.5 in |
| Warranty | 2 years | 2 years |