Small Duct Systems
As sole distributor and installers of the Invisible.AC high-velocity system, Quantum provides the industry’s most discreet air conditioning and heating product. Aesthetically pleasing coupled with outstanding performance, the system is a perfect solution for residential, commercial, and heritage buildings.

Highly efficient air-handling units distribute cooled or warmed air through flexible space-saving mini-ducts, injecting the air at high velocity through discreet linear slots or round outlets.

An Invisible.AC solution combines air conditioning, heating, ventilation, and UV air purification in a single system for year-round comfort. Skillfully sited high-velocity ‘Aspiration’ air-jets eliminate drafts and ensure a temperature differential no greater than 1ºC throughout a room, compared to the variation of up to 6ºC with conventional systems. The system also removes 30% more relative humidity. The reduced humidity means you can set the temperature higher, saving energy and running costs when cooling. System zoning gives users the flexibility and control to set precise temperatures for different conditions in different areas. The basic Invisible.AC Twin zone product allows up to full cooling duty in either zone.

Product Features

With an Invisible.AC there is no need to compromise on appearance. Discreet outlets for cool or warm air eliminate the need for less aesthetic grills, wall-units, radiators and pipe runs. The single 25-mm wide linear slot ceiling, wall, or floor outlets blend with any traditional or contemporary décor. Inconspicuous round outlets are also available.


The Invisible.AC system is one of the quietest around. The use of acoustic technology throughout ensures that the system operates at low noise levels with minimum vibration. Sound-attenuating ducts, smooth-running equipment, extensive insulation, and low-turbulence outlets enable noise levels as low as NR20 for quiet areas in homes, hotels, restaurants, and working areas in offices.


Invisible.AC systems are compatible with reversible heat exchanger units to provide air conditioning and heating from a single source. As well as eliminating the additional capital costs of installing two separate systems, the combination of a modern heat-pump and an Invisible.AC system can increase energy efficiency and energy savings by 30% over conventional fossil fuel installations. The ability to deliver constant, even temperatures and the potential savings from system zoning can increase energy efficiency even further.


The compact Invisible.AC air-handling equipment fits easily in a roof or cupboard space with small, flexible mini-ducts running in ceiling voids or partition walls. The system is quick and easy to install in new or existing buildings and is suitable for traditionally challenging properties such as historical buildings.

Tailored Solutions for each environment

Invisible.AC offers residential customers the convenience of a cooling and heating system that reduces energy costs. With zonal control, they can choose comfortable temperatures for different rooms.


Zonal control is one of the most important requirements in commercial properties like restaurants and retail outlets. Invisible.AC systems provide comfortable temperatures for customers, while maintaining appropriate temperatures in working areas, helping to improve working conditions. They protect products in storage or on display, maintain temperature at a level that meets legislation.

New Build

Invisible.AC products are more compact than existing technology systems, providing great performance whilst ‘invisible’. They fit into the smallest ceiling void in new construction (<150mm). And can be easily integrated with fresh-air energy recovery ventilation systems.

Invisible.AC – the revolution possible with mini-duct air distribution. Historic buildings were never originally intended to have ducted systems installed. Authorities and owners can now install a system that provides heating, cooling, fresh-air and dehumidification without impacting on the visual appearance or the fabric of the building.

System Components
Supply Air Mini Ducts
Air Handlers
Return Air Grills
Return Air Duct
Energy Sources

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