Hi Wall Mounted
These are the most popular type of Heat Pump Air Conditioning Systems for domestic installation, and are also widely used in light commercial installations.
By mounting the system high on the wall we make the most efficient use of the position for both heating and cooling. In the heating mode, the fan directs the heated air down to the floor where it spreads across the room more effectively than most other appliances.
In cooling mode, the cool air is directed horizontally across the top of the room where it falls naturally to provide comfortable conditions.
These are the most energy efficient type systems.

Cassette Type
With the body of the system recessed into the ceiling, all that is visible is a ceiling panel with air directional louvers. On the heating mode, the louvres direct the air down toward the floor. On the cooling mode, cool air is directed across the ceiling to achieve comfortable conditions. These systems are suitable for domestic, office and commercial situations.

Floor Console
These are mounted either low on the wall or on the floor against a wall. On the heating cycle, the warm air is directed across the room with some models having bottom distribution as well as top distribution. On the cooling cycle, the cold air is directed upwards towards the ceiling and across the room. These are often used as replacements for existing night store systems.

Under Ceiling Type
Here the indoor unit is mounted under the ceiling to direct conditioned air across a room. In the heating mode, the warm air is directed downwards. In the cooling mode, cool air is directed across the ceiling. These are particularly useful in retail situations.
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Ducted Systems
The indoor unit is designed for concealed operation usually in a ceiling space or under the floor in some domestic situations. The system has a powerful fan to push conditioned air through a series of ducts and outlets into a number of rooms. This type of system has wide usage in commercial situations, but can be practical for domestic use if the design of the house allows it.

Split Systems
A Heat Pump Air Conditioning system that has a separate indoor and outdoor component is described as a split system. All of the above described systems are split systems. Some ducted systems can be packaged as a single system but these are usually for large commercial operations.

Inverters
Inverter Air Conditioners were invented by Toshiba in the early 1980s and have been embraced by most Heat Pump Air Conditioning manufacturers in recent years.
A sealed motor compressor is at the heart of most Heat Pump Air Conditioners; traditionally this motor compressor had one fixed speed, the advent of the inverter system allows the compressor to speed up or slow down according to demand. A room sensor monitors the room temperature and varies the speed of the compressor accordingly. The leading manufacturers are into the second and third generation inverters to provide energy efficiency at a very high level.
Most of the Heat Pump Air Conditioning systems described are available in Inverter models.

Plasma
As demand increases for clean and healthy air, so the manufacturers have responded by improved filtration systems. Plasma filtration systems are available in the Inverter High Wall deluxe models.
Manufacturers boast that besides the collection of fine dust, pollen and other allergy producing substances, this filter also provides disinfecting and anti-viral effects.

Efficiency
Heat Pumps use less energy to create the same amount of heat than most common forms of home heating, for example: a standard electric heater uses approximately 1kW of electricity to produce 1kW of heat, whereas a good quality heat pump operating at 7ºC can produce more than 3½ kW of heat while using only 1kW of electricity; this means lower running costs.
The reason for the Heat Pump’s high efficiency is that low temperature outdoor heat is transferred indoors as higher temperature usable heat.

How they work
The Heat Pump split system consists of a compressor and two coils made of copper tubing (one in the Indoor Unit and one in the Outdoor unit), which are surrounded by aluminium fins to aid heat transfer. In the Heating mode liquid refrigerant extracts heat through the outdoor coil turning the liquid refrigerant into a gas, this gas then passes through the compressor and is pumped to the indoor coil as a hot gas. The hot gas then condenses into liquid in the indoor coil, and as it does, so gives off its heat as a fan passes air across the heat exchange coil.

410A Refrigerant
This is a recently developed refrigerant that contains no ozone depleting substances, and has proved to be a lot more energy efficient than the refrigerants it replaced.
As a system using the 410A Refrigerant operates at higher pressures than R22, new compressors and heat exchange coils needed to be designed to cope with the extra pressure; this means that not only should well manufactured products be selected, but also experienced installation is paramount for a reliable system.