Ryan Johnston of the Waterville Fire Department leads a training exercise on roof ventilation Monday at the Oakland Fire Department. Johnston discussed techniques in ventilating a roof in case of fire.

Ryan Johnston, top, of the Waterville Fire Department, leads a training exercise on roof ventilation Monday at the Oakland Fire Department. Johnston discussed techniques in ventilating a roof in case of fire. Later to demonstrate a vent saw, he cut a hole in the roof of a training model in the parking lot. Firefighters from Smithfield, Sidney and Oakland participated in the training.

Ryan Johnston of the Waterville Fire Department carries a vent saw toward a ladder as he leads a training exercise on roof ventilation Monday at the Oakland Fire Department.

Ryan Johnston of the Waterville Fire Department leads a training exercise about roof ventilation Monday at the Oakland Fire Department. Later he demonstrated how to use a vent saw by cutting a hole in the roof of a training model in the parking lot. Firefighters from Smithfield, Sidney and Oakland participated in the training.

Ryan Johnston of the Waterville Fire Department, right, talks with Oakland firefighter Jennasea Hubbard during a training exercise Johnston led about roof ventilation Monday at the Oakland Fire Department. Johnston discussed techniques in ventilating a roof in case of fire. Later he demonstrated a vent saw by cutting a hole in the roof of a training model.

Ryan Johnston of the Waterville Fire Department leads a training exercise on roof ventilation Monday at the Oakland Fire Department. Johnston discussed techniques in ventilating a roof in case of fire.