The Variable Refrigerant Flow system, or VRF system, is a more sophisticated version of the the multi split system offering increased efficiency, smaller and more powerful indoor units, the ability to connect far more indoor units and a far larger capacity range.

Variable refrigerant zoning is an energy-efficient method of providing precise comfort control to indoor environments. Larger units and capacities can take advantage of it’s heat recovery technology, effectively allowing the system to utilise waste heat from spaces being cooled to heat others.

The outdoor units may also be banked together on the same system as required capacity dictates. The outdoor unit may also be located much farther from the space served than with a conventional split system.

The majority of our architectural designed residential projects and light commercial medical / office fit outs are a great canvas for the installation of VRF type air conditioning systems.

Indoor Unit Options and Combinations

There are a number of alternative indoor unit options available, the choice of which will depend on the unit’s interaction with the proposed space and your preference. Note that in all instances the overall system configuration remains the same (for example; indoor units, outdoor unit and refrigerant piping), with only the indoor unit changing in each case. Work with us to find the indoor unit that works for your space!

Wall Mounted

Wall mounted air conditioning units are among the most commonly installed domestic air conditioning system. Their installation is low on impact, cost and space with a functionality that is familiar.

They are a great option for both new builds and for the addition of air conditioning to an existing space.

Concealed Ducted Unit

This ducted air conditioning option affords the user the opportunity to conceal the indoor unit behind suitably aesthetic ventilation grilles. It is an excellent option when a discreet air conditioning installation is preferred. Units are typically installed above lowered ceilings, delivering the air to the space via a bulkhead. This iteration is a single zone unit.

Concealing the air conditioning unit ensures that it is out of sight and out of mind.

Multi-Zone Ducted Unit

Again this option affords the user the opportunity to conceal the indoor unit behind suitably aesthetic ventilation grilles. In this case the unit supplies and returns air from multiple spaces and is installed in a central location. This unit gives more flexibility on the type of ventilation grille that may be used, introducing grilles that may be installed flush to the ceiling.

Concealing the air conditioning unit ensures that it is out of sight and out of mind.

For information on our whole house air conditioning solutions click here.

Ceiling Mounted (Cassette)

Although less common in a domestic setting the ceiling mounted ‘cassette’ type air conditioner offers great functionality in a space, allowing for a centrally located installation and 360 degree air distribution.

Ceiling mounted units can be an excellent choice in a dining or multi-functional room setting domestically and commercially their air distribution is the perfect pattern for an office environment.

Floor Mounted

Floor mounted units come with both a standard and a concealed option.

The standard model is low impact from an installation perspective and offers a sleek design. There are options to mount them to both wall and floor.

Floor Mounted (Concealed)

A concealed floor mounted AC unit is a great option for areas where ceiling and wall space is at a premium.

They can be recessed within walls or housed within custom joinery with only their two grilles and the controller visible.

A concealed unit is out of sight and out of mind.

Under Ceiling Suspended Type

Again less common than the wall, floor and ducted units the ceiling suspended offers an alternative where spatial or design considerations prohibit the use of the other indoor units.

It’s main operational benefit is an excellent air distribution pattern via the high level supply.


Modern air conditioning units offer vast improvements in energy efficiency, noise generation, functionality and ease of installation.

High efficiency inverter technology

Modern air conditioning systems benefit from advances in inverter technology. This allows the unit to deliver the required room conditions in an efficient, economical manner. The VRF system has the added benefit of modulating the amount of refrigerant delivered throughout the system, reducing the power required as loads decrease.

Single zone control

VRF systems comprise multiple indoor units, each serving a single zone, allowing the occupant to switch on or off the unit as and when it is required without affecting other occupants in the house. The unit may also turn on and off based on a number of other methods, including an occupancy sensor, preferred set point conditions or via a time schedule. This ensures that energy is not wasted conditioning unused spaces. In a multi system control from a central controller is available, allowing for all of the above settings to be programmed universally or individually.

Additional control options

From the wall mounted or remote controller within the zone the occupant can easily switch between the available modes; heating, cooling and ventilation while adjusting the immediate perceived effect of the supplied air via the fan speed, air direction and room temperature.

Our VRF systems are fully compatible with the MyAir control system and the remote control system ‘Cool Remote’ along with all common Building Management Systems (BMS) such as BAcnet, Modbus, C – Bus and LONbus.

WiFi connectivity is available, offering remote programming of the system. Come home to the environment that suits you.

Low noise

Modern units are quiet thanks to efficient fans and a focus on effective noise control. The unit can operate in the background without affecting your focus.


While the cost of install for a VRF system is higher, it offers long term savings in running costs due to it’s higher efficiencies.

Ease of installation

The VRF system offers greater flexibility from an installation perspective, particularly with respect to the outdoor unit. The VRF units offer greater capacity within a smaller footprint. Connection between spaces is via pipework and cabling only, no ductwork. The connections are easy to reticulate and conceal.