Mini-Duct Reverse Cycle Aircon system in Sydney

We've recently moved into a top (8th) floor apartment in a 1930's building in Sydney where we have access to the attic above.

We want to install reverse-cycle ducted aircon with the heat pump either installed in the attic (it is well vented) or on a back balcony.

We also have original decorative plasterwork on some of the ceilings in the rooms which we want to preserve and so we're looking for mini-duct systems to minimise the visual impact of the vents - but I can't seem to find anyone who does them in the Sydney area - any suggestions?


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