The THG30 is made for ridge ventilation systems. It is ideal for frequent / intesive uses. It boasts brass support rings.
Depending on the system, the sprocket case can be controlled through a GW or GWK geared motor. This case, which is fitted as standard to accommodate a 30 mm rack, is to be fixed on the rack thanks to two M8 x 12 screws. The tightening torque of the setting screws is 8Nm.