Novel air conditioning technology, incorporating multi-lobe nozzles and improved internal ducting, is being installed in dozens of buildings in Australia, New Zealand, Singapore and Europe where it is dramatically increasing air conditioning efficiency and comfort conditions, and reducing noise and operating costs.

Designed and developed by Dadanco Pty Ltd (SA) to improve the performance of induction air conditioning systems, the radical technology can increase the capacity of existing induction air conditioners by up to 50%.

Designed and developed by Dadanco Pty Ltd (SA) to improve the performance of induction air conditioning systems, the radical technology can increase the capacity of existing induction air conditioners by up to 50%

The technology has extensive ramifications for the architectural, building construction and property maintenance industries.

Vladimir Petrovic, Dadanco Managing Director, said the technology comprises patented new nozzles and a re-designed internal profile of the mixing chamber.

"Measurements have shown that the new nozzle and profiled wall sections improve the entrainment of air through the secondary exchanger between 40% and 77%," Mr Petrovic said.

"The increased efficiency reduces the demand for primary air pressure from the main plant, allowing smaller ducting to be used to achieve the same or, in some cases, even better results with induction systems than other air conditioning systems."

Dadanco's compact unit and duct design means ceiling space in new buildings can be reduced to 350mm, lowering the slab-to-slab height without reducing floor-to-ceiling height.

By applying Dadanco technology to new installations, architects, property developers and construction companies can add one extra floor for every 12 proposed in the same building height. Architects can effectively reduce the size of plant rooms by about half for the same air conditioning efficiency.

Dadanco technology is available as a unit refurbushment kit, a retro-fit replacement unit upgrade, or as new Starline systems suitable for office buildings, hotels, hospitals, schools and airports.

By extending the application of this innovative technology, Dadanco has recently developed a new product, Active Chilled Beam (ACB), that is ideally suited for air conditioning systems in new buildings.

"Active Chilled Beams, combined with HDP (High Driving Potential) method of air conditioning, provide the means for conditioning the air in all building types, in all climatic regions in the world, maintaining dry bulb temperature of 23oC and 50% relative humidity," Mr Petrovic said.

"When using Active Chilled Beams (ACB) in a system, the typical energy consumption of a primary air fan is only 35% of the energy consumed by a fan operating with an all-air system.

"Active Chilled Beam systems are also low-profile, requiring smaller air ducts, and exhibit the same space saving properties of Dadanco Starline systems," he said.

Mr Petrovic said some of the other benefits of Dadanco Starline and Chilled Beam units are that they have no moving parts and only require an inspection once a year. Every office and meeting room on every floor served with Starline and ACB units will have the ability to adjust room temperature to individual needs.