1. Minimize backpressure for a free air exit
2. an angled throat construction and the very professional flowing construction makes it possible to achieve the best airflow volume
3. The adjustable solar installation angle maximize the exposure of the sun to the solar panel ,and optimun sun light and thus the optimun airflow volume ,not just a so called solar fan . 
4. If needs to be installed in a shaded roof our remote model can provide the solution .
6. 1.5mm thickness Galvanized sheet enclosures or 1.5mm thickness aircraft grade aluminum enclosures make it is possible to be installed any places exposed to a humidity,or salt surroundings 
6. Proforssional roof master make the flashing either for a metal roof ,tile roof or flat roof with seamless attention.
7.12",or 14" nylon or alloy fan blades pitched for maximum Air flow at low rotation speed
8. Motor:German design 12V or 24V variable brushless digital controller motor

9.Anti-UV power coating could survive from critical salt surroundings
10.Mounting type

Round flat base

Curbo mounting (rice is higher 5%)

Square flat base

11.Customerized service for logo ,colour ,packing and installation manual.

10.Airflow and dBA noise