Use Tyco® horizontal sidewall sprinkler to create a seamless look without compromising safety. The RFII sprinkler offers standard coverage and features a flat cover that conceals the unit within a wall. The horizontal sidewall (HSW) sprinkler is a decorative, link-type sprinkler that is designed for installation along a wall or beam beneath a smooth, level ceiling. The flat profile of the cover plate design easily blends with the surrounding surfaces, creating a clean look and making it the best choice for architecturally sensitive areas.