Lasers like your Glowforge require ventialtion. All Glowforge printers come with a 4" (10 cm) diameter hose which allows you to use your Glowforge near a window. Our Air Filter upgrade lets you put your Glowforge anywhere. It sits on the ground near your Glowforge printer and cleans the air, allowing you to operate it anywhere in your home, school, or office! Currently available for US customers.