Chialiang’s detailed the process in his Instructables page, which basically involves cutting the lid to fit the filter, and then drilling five holes into the piece of wood; one to attach the filter and the other four for airflow. He then drilled a larger 32 mm hole to the side of the container and passed a hose through it.
Finally, he connected the hair-dryer to the other side of the piece of wood and also wired a control switch to the contraption. Flick through his images to understand the procedure for these steps.
The instructions are available here.