Heating in DandenongThree kinds of house, three answers
Dandenong does not have one typical heater. The 1950s weatherboards near the centre were built around a single gas wall furnace in the lounge, and many still rely on it, with the bedrooms left cold. The 1960s and 70s brick veneers have a ducted gas heater in the roof. The units and townhouses built on subdivided blocks have whatever was cheapest that year, often a wall furnace and nothing for summer.
Each of those wants a different reverse cycle system. A weatherboard with a low roof and no duct space gets split systems or a multi-head, one unit for the living area and others for the bedrooms that matter. A brick veneer with an open roof space gets the proper ducted swap: gas heater and old ducts out, a ducted reverse cycle unit in, new R1.5 insulated ducts to every room. A unit gets one or two splits, placed so the outdoor unit does not bother the neighbours.
In every case the house gains cooling it did not have, and the heating runs at around a third of the running cost of gas heating. For the many rental properties in Dandenong, a split in the living room is also the simplest way to give tenants an efficient fixed heater. We look at the house first and recommend from there, alongside the rest of our Dandenong work.