The other night we made a stucture fire at what we thought was a single story wood frame. Fire was visible from one window on the "D" side of the structure. Moderate smoke was showing around a door that was next to the window. Our Engine layed a line in from the closest hydrant and my rig (Ladder-7), was assigned to ventilation. Since I only had 3 people on the rig, including me, I assigned my driver and firefighter to vent the roof, while I took the PPV fan to the point of entry, which in…