<p> Surface mounts that are specifically mounted to the ceiling are also called ceiling mounts. Some surface mount lights in industrial lighting can be attached to the ceiling by either a static fixture or a chain. The air handling unit (AHU) is <strong>the heart of central air conditioning</strong>. It collects outside air and room air, removes dust and other particles from the collected air, adjusts the temperature and humidity and then supplies comfortable and refreshing air-conditioned air into the rooms through ducts. <strong>The FCW consists of a fan coil unit, a heat exchange element, and a filter</strong>. Fan coils are ideal machines for summer air conditioning and winter heating of the home and of any room. including for more details download this file .</p>