The 8.0 K-factor, Model CHEC (Concealed Horizontal Extended Coverage),Quick Response Light Hazard,Sidewall Sprinklers are decorative, 3mm bulb type sprinklers featuring a unique cover plate designed to conceal the sprinkler. It is the best choice for architecturally sensitive areas such as dormitories, hotel rooms, reception areas, office buildings, banquet facilities,conference rooms, and hospitals.They are designed for installation along a wall or the side of a beam and beneath a smooth and level ceiling.