A good constructive solution conditioning apartment is a decision based on the channel air-conditioner. In this case, the inner channel air-conditioner unit is placed behind the ceiling in any convenient place (bathroom, closet, etc.). Air Distribution system is insulated ducts, which are hidden in a ceiling or artificial girders. Advantages channel air-conditioner is the ability to ensure podmesa fresh air from the street needed for a healthy breath of people in the apartment. Podmes air is carried out in the right quantity and quality of the treatment. That is, the application of channel air-conditioner can solve the problem of air conditioning and ventilation simultaneously. Estimated cost of air conditioning on the base channel air-conditioner with podmesom of fresh air per 1 m2 of horizontal surface from 80 to 95 USD. Note: The abundance of design and design decisions can arrange air-conditioning system based on channel air-conditioner in almost any house, without prejudice to the interior design. On the basis of split or multi split systems For conditioning apartment typically used split or multi split system. Multi-split system differs from "simple" split-systems is the fact that a single outdoor unit connects several internal. This indoor units can be not only a different capacity, but also of different types (wall, floor, ceiling, cassette and channel). Multi-split systems are used where there are restrictions on placement of several outdoor units. Contrary to popular misconception, the replacement of several split-systems on a single multi-split system the buyer does not receive a prize in the price. The fact that the cost of equipment will be approximately the same, and the installation costs may increase due to longer communications. Multi-split systems are of two types: fixed and patterned. Fixed multi-split systems have completed a complete set, ie to the outdoor unit connects a specified number of indoor units, each of which has a certain power. Such multi-split systems are usually 2-3, rarely 4 internal block and sold ready-made kits. In typesetting systems, to the outdoor unit can connect to any internal blocks of a certain series, with limited their total capacity and the maximum number (usually up to 5-7 pieces). Fixed multi-split systems are usually referred to household air conditioners, and typesetting - to the semi. Further development of multi-split systems are multizonal VRV and VRF systems.