Rusklimat. Neftekamsk, Russia

Split system
Split system air conditioning, consisting of external (condensing) and internal (evaporative) blocks.
The external unit is usually mounted on the facade of buildings, inside - inside the room. The indoor unit split systems can be installed anywhere, not just on the wall indoor units, in addition to the wall can be a floor, ceiling, columns and embedded in the ceiling - channel or cluster. These blocks are connected two thin copper pipes in insulation. The tubes are inside walls, in false ceilings, behind panels, etc. or closed by decorative plastic boxes.
The most noisy part is the air conditioner compressor. In split-systems is shown in the outer wall of the building, which resulted in shortyou work. The noise level at the most "advanced" models is 22:26 dB further noise reduction is possible only when installed on the refrigerant line mufflers.