Ductless, mini split-system air-conditioners (mini splits) possess numerous potential applications in residential, industrial, and institutional structures. The most typical applications will be in multifamily housing or as retrofit add-ons to homes with "non-ducted" heating systems, such as hydronic (hot water temperature), radiant panels, and space heaters (real wood, kerosene, propane). They may also be a good choice for room additions and small apartments, where extending or installing distribution ductwork (for a central air-conditioner or heating systems) is not feasible.
Like central systems, mini splits have two main components: an outdoor compressor/condenser, and an indoor air-handling unit. A conduit, which houses the power cable, refrigerant tubing, suction tubing, and a condensate drain, links the outdoor and indoor units.
Advantages
The main advantages of mini splits are their small size and flexibility for zoning or heating and cooling individual rooms. Many models can have as many as four indoor air handling units (for four zones or rooms) connected to one outdoor unit. The number depends on how much heating or cooling is required for the building or each zone (which in turn is affected by how well the building is insulated). Each of the zones will have its own thermostat, so you just need to state that space when it's occupied, saving money and energy.
Ductless mini split systems are also typically much easier to install than other styles of space conditioning systems. For instance, the hook-up between your outdoor and indoor devices generally requires just a three-in . (~8 centimeter [cm]) hole through a wall structure for the conduit. Likewise, most companies of this kind of program provides many different lengths of linking conduits. So, if required, you must locate the outdoor device as a long way away as 50 feet (~15 meters [m]) from the indoor evaporator.
This can help you cool rooms on leading side of a building home with the compressor in a far more advantageous or inconspicuous put on the exterior of the building.
Since mini splits haven't any ducts, they avoid the strength losses connected with ductwork of central forced surroundings devices. Duct losses can take into account a lot more than 30% of energy usage for space conditioning, particularly if the ducts will be within an unconditioned space such as for example an attic.
Weighed against other add-on devices, mini splits offer even more overall flexibility in home design options. The interior air handlers could be suspended from a ceiling, mounted flush right into a drop ceiling, or hung on a wall structure. Floor-standing models are likewise available. Most indoor devices have profiles around seven ins (~18 cm) deep and usually include sleek, high-tech-looking jackets.
Many also give you a remote control to create it much easier to turn the machine on and off if it is positioned on top of a wall or perhaps suspended from a good ceiling. Split-systems may also support to keep your house safer, because there is merely a small hole in the wall. Through-the-wall and window mounted room air-conditioners can provide an easy entrance for intruders.
Disadvantages
The primary disadvantage of mini splits is their cost. Such systems cost about $1,500 to $2,000 per ton (12,000 Btu per hour) of cooling capacity. This is about 30% more than central systems (not including ductwork) and may cost twice as much as window units of similar capacity.
The installer must also correctly size each indoor unit and judge the best location for its installation. Oversized or incorrectly located air-handlers often result in short-cycling, which wastes energy and does not provide proper temperature or humidity control. Too big a system can be more expensive to get and operate.
Some many people may well not just like the appearance of the interior area of the program. While less obtrusive when compared to a window room air conditioning equipment, they rarely have the built-in glimpse of a central program. There must be a location to drain condensate drinking water nearby the outdoor unit.
Certified installers and service persons for mini splits may well not be simple to find. Furthermore, most conventional cooling and heating contractors have huge investments in equipment and teaching for sheet metallic duct systems. They have to use (and demand for) these to gain a return on the investment, so they may well not recommend ductless systems except where a ducted system would be difficult for them to install.