Refrigerated air conditioning is often referred to as reverse cycle, cooling only and or heat pump systems. Whatever the term, refrigerated air conditioning works on much the same principles as your fridge at home. A compressor is used to transform and move refrigerant gases through certain pipes that extract heat or cool from the outside air, and therefore deliver warm or cool air inside. Most systems are available in cooling only or reverse cycle (heating & cooling).

Cooling only models are generally slightly cheaper to purchase than reverse cycle models. Reverse cycle is like reverse gear in your car, it allows the system to work backwards and this gives you the opposite to cooling, which is heating.

Refrigerated air conditioning can be designed to create almost any indoor temperature level, but keep in mind that the cooler or warmer you wish to be than the more it may cost to install and / or operate. There are two main styles of systems that Blueline Heating & Cooling supply and install. They are split systems and ducted systems.

This type is produced in many forms including floor mounted, ceiling suspended and ceiling cassettes and ducted. However the most common form for residential purposes is that of the high wall version. The Daikin high wall version is still a single room air conditioner, but has the attraction of being very quiet and features more user friendly controls.

This system comprises two parts, an indoor unit and an outdoor unit. The indoor unit is mounted to your wall (exterior walls are easier and therefore cheaper to install) and the outdoor unit is located as close as practically possible to the indoor unit. The indoor and outdoor units are then connected by copper pipes that carry refrigerant gas between the two units. They are also connected by electrical cables that supply power and a means of communication between the two units. For installation to comply with warranty, these systems need to be installed by a licenced refrigeration air conditioner installer. 

High wall split systems are generally operated by means of a remote control that comes with the system. The remote control gives you the ability to set fan speed, angle of air delivery, move between heating and cooling (reverse cycle models), temperature setting and often timer functions.

The latest advancements in technology have left us the wonderful legacy of the inverter system. The inverter system is slightly more expensive to purchase, but is designed for those who want savings in longer term running costs. In simple terms, inverter technology means the air conditioner features a variable speed motor combined with a type of cruise control. The benefit to you the customer is that the smooth non-erratic easy running of this motor can save you up to 30% on your operating costs. It also delivers a more even temperature than non-inverter systems. Ask for a demonstration in our showroom.

Ducted refrigerated air conditioning is considered the ultimate in whole home comfort. Ducted systems are a type of split system (like high wall splits), but the indoor is designed to have ducting attached to it. This indoor unit is normally located in the roof cavity. This means that as long as there is suitable roof cavity space, than refrigerated heating and / or cooling can be ducted to any room you require. Most ducted systems are normally only available in the reverse cycle type. 


With ducted systems there is an outdoor unit and an indoor unit. The main components and their uses are:

  • The outdoor unit is best located as close as possible to the indoor unit. • 
  • The indoor unit is mounted in the ceiling cavity. • 
  • Attached to the indoor unit is a duct system that delivers air to the required rooms. 
  • In each room there is a vent/register mounted in the ceiling. This vent/register should be located close to the window so that the air can be drawn back through the room to the return air grille. • 
  • As refrigerated systems are recirculating, a return air grille and return air duct is needed to take the air from the rooms back to the indoor unit. The return air grille is normally located in a central area of the home such as the hallway. This grille also features a filter to keep the indoor unit clean; it also helps with house keeping and allergies. It is important to note that these filters (which slide out) should be cleaned at least once per month. This will not only assist in the efficiency of the unit it will also help to keep the running costs down. The dirtier the filter, the harder the unit works and the less efficient it becomes. 
  • There are also available special high-level filter systems available for those who desire better air quality, for reasons such as allergies. • 
  • The system is operated by means of a wall-mounted controller. 
  • Due to the larger capacity of most ducted systems, three-phase power is often required or preferred. You should contact your electricity supplier to learn the availability of three-phase power supply to your home or business. 
  • If your power supply is restricted to single phase, than smaller units and / or zoning may be the option. 
  • Ducted Reverse Cycle Air Conditioning can cost approximately three times the amount of Evaporative Air Conditioning to install. As with most types of refrigerated air conditioning it is also more expensive to operate than ducted evaporative air conditioning. However, the great benefit is that you can have cooling and heating in one system, whilst enjoying the comfort of perfect temperature control, in any weather.

Evaporative air conditioners are boxes that normally sit on the roof of a home. Inside the box is a fan, water pump and water storage tray. The sides of an evaporative system hold a filter pad. 

The water pump pushes the water from the storage tray up to the top of the filter pad so that the pads become wet. Once wet the fan is operated so that fresh air is now drawn in through the pads and producing fresh cool air. This air is than distributed to the various rooms of the home via ducting installed inside the roof cavity.

Evaporative air conditioners are designed to simulate a cool sea breeze. The ceiling vent/register for evaporative air conditioning should be located towards the inside of a room, opposite a window (our experience staff when quoting will look as to the most appropriate place for these vents to be placed.) This allows the cool air to pass through as it exits the room using the open window. This cooling experience feels much the same as if you were to ride a bike when wet, the water and air movement creates the cooling. There is of course technical ways of testing an evaporative air conditioners performance on a given day, however as an approximate guide if you were to achieve an inside temperature of seven to eight degrees lower than outside than the system should be working quite well.  Some systems could achieve up to ten degrees lower than the outside temperature however it depends on the system and design of the house.  It also depends on how hot the day/nights are. 
Because evaporative air conditioning uses the evaporation process to cool, the system will not be as effective on humid days or in more humid locations, such as many coastal areas. They do work well in areas that have hot, dry weather. Evaporative air conditioners are generally not able to feature exact temperature control; rather they work off comfort level of the user.

For evaporative air conditioning to work there must be a certain amount of air relief from the home, ie, some doors / windows must be open to allow the air to escape and let new fresh cool air to take its place. If there is not enough air relief than the home can become muggy and uncomfortable, therefore not very cool.

Visit Our Showroom 8 White Street Dubbo. Call us: (02) 6884 0000