Some quotes from the rule book, my emphasis:
If a Hunter’s Attack reduces the Window Token to 0 Health Points, flip the token to the Sunlit side. During the Day, all Vampires in the Room are Destroyed by the Sunlight, simply remove them. The Hunter that uncovered the Window takes the Focus for the Vampires that were Destroyed.
A harpoon may be carried by one of the Hunters, attached to the winch by a tough cable. When a Vampire is snagged by the harpoon, the winch winds the cable, dragging the Vampire outdoors to be destroyed by the burning light of the Sun.
Although the Extractor Destroys powerful Vampires easily, there are many restrictions that must be followed before it can be used:
• The Extractor can only be used during the Day. Discard the Harpoon Card during the Awakening.