Ductless Heat Pump–Understanding

The ductless heat pump is most appropriate for homes with open floor plans, since each indoor head can serve the entire zone not blocked by doorways. In addition, it can be used to replace an existing zonal heating system. It can also be used to rooms, which is added to a house or an attic is converted to living space. By using this, you will not need to extend your home’s existing ductwork or pipes or add electric resistance heaters since it can provide efficient heating and cooling. The ductless heat pump is a cost effective way of providing your home the heating and cooling it needs.This type of heating system consists of an outside compressor unit and one or more inside heads that deliver conditioned air to the room or rooms. The inside units of this system are typically mounted high on the wall.
 
However, there are also models that can be recessed in the ceiling or even installed with a short duct run to serve adjacent rooms. The inside and outside units of the ductless heat pump are connected by refrigerant lines that are usually concealed in the walls or ceilings, or under a cover on the outside of the house. There are also models that allow several indoor heads to be connected to a single outside compressor. This type of device also operates on the same principle as traditional heating system. It also uses electricity to move heat between outdoor and indoor air by compressing. It is sometimes called the mini split heat pump because they tend to have smaller capacity or BTU per hour tonnage rating. In addition, they have a split system with separate compressor (outside) and expansion heat delivery unit or inside units. However, they are similar to traditional heating system but they are not similar to through the wall unit. The most recent advantage of this system is that it uses a newer, less environmentally harmful refrigerant called R-410a. It also only requires a 110 or 220-volt AC power depending on the rated capacity. It has a very quiet oscillating fan that delivers conditioned air more evenly to all parts of the room. They also provide a dehumidification of the indoor air. 
 

Source: Heat Pump, Household Heat Pump