MaxxAir Maxxfan Plus 4500K
#1 in Open lidFull review
For owners who want full automation in an open lid fan and do not need it to run in rain. The rain sensor, thermostat and remote make it close to set and forget.
Amazon $338.09$338.09
The MaxxAir Maxxfan Plus 4500K is the better RV roof vent fan overall, rated 3.8 to 3.1. The MaxxAir Maxxfan Plus 4500K leads on features and speeds. The MaxxAir Maxxfan Plus 4002K wins on price. The MaxxAir Maxxfan Plus 4002K costs $66.88 less ($271.21 vs $338.09).
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 4500K for features (reversible, powered lid, thermostat, rain protection, remote vs reversible, thermostat) and speeds (10 speeds vs 4 speeds).
- Choose the MaxxAir Maxxfan Plus 4002K for price ($271.21 vs $338.09).
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 4500K | MaxxAir Maxxfan Plus 4002K |
|---|---|---|
| Overall rating | 3.8/5 | 3.1/5 |
| Price 25% | 14 $338.09 | 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% | 100 reversible, powered lid, thermostat, rain protection, remote | 45 reversible, thermostat |
| Warranty 25% | 50 2-year warranty | 50 2-year warranty |
Specifications
| MaxxAir Maxxfan Plus 4500K | 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 | Yes | No |
| Rain sensor | Yes | No |
| Thermostat | Yes | Yes |
| Remote | Yes | No |
| Light | No | No |
| Fit and build | ||
| Roof thickness | 2 to 6.5 in | 2 to 6.5 in |
| Warranty | 2 years | 2 years |