Rockhampton facts that change the install
Heat that eats capacity
ActronAir says that above 35 degrees an air conditioner loses cooling capacity, giving the example of a 14 kW system dropping to 10 kW or 12 kW. At the Bureau of Meteorology's Rockhampton station, the average January's hottest day is 38.1 degrees and the record is 45.3.
Mostly cooling, some heating
Rockhampton is in climate zone 2 on the ABCB map. The Queensland Government's aim there is cooling for summer and some warmth for winter, with air-conditioned rooms well insulated and sealed. July nights average a minimum of 10.6 degrees.
Separate houses
88.1% of occupied private dwellings in the Rockhampton council area were separate houses at the 2021 Census, so most installs are on a house you can plan as a whole.
Flood-prone blocks
Get Ready Queensland suggests raising air conditioner units and switchboards above the flood level in flood-prone homes. That's far simpler to plan at install than to retrofit.
Which system suits a Rockhampton house?
| Split systems | Multi-split | Ducted | |
|---|---|---|---|
| Suits | One room or an open living area | Two to five rooms, each with its own control (Rinnai) | The whole house, with only the vents showing |
| On the hottest afternoons | Each unit only has its own room to cool | Every indoor unit shares one outdoor unit | Zoning lets you cool just the rooms in use |
| On cool July nights | Heat mode in the rooms you use | All indoor units must share heating or cooling (Mitsubishi Electric) | Heat one zone, such as the bedrooms |
| Refrigerant licence | RSS03 or RAC01 (single head under 18kW) | RAC01 | RAC01 if over 18kW |
What makes a Rockhampton install bigger or smaller
The size. Because units lose capacity in strong heat, an installer may suggest a step up for a living room that takes the afternoon sun. Rinnai warns against going too far: an oversized system short cycles, switching on and off too often, and dehumidifies less well.
The outdoor unit's spot. A unit on the ground beside the wall is the simple version. One lifted onto a bracket or stand above flood height, with the isolator and wiring raised to match, is more work, and on a block that floods it's worth it.
The switchboard. Mitsubishi Electric says each air conditioner needs a dedicated power supply, so an older board with no spare room may need work first.
Insulation. ActronAir says a well insulated home likely won't need as much capacity as a poorly insulated one, so sealing gaps and fixing the ceiling insulation first can bring the size down. Our main installation page walks through the rest of the job.
Licences for an install in Queensland
Installing air conditioning is mechanical services work, which the QBCC says needs a QBCC licence at any value. The wiring needs a licence from the Electrical Safety Office, and the QBCC says a restricted electrical licence for air conditioning technicians doesn't permit installing interconnect cables. On the refrigerant side, the ARC's restricted RSS03 licence covers a single-head split under 18kW; multi-splits and bigger systems need a full RAC01 holder.
If there are licence-checked installers near you who specialise in that kind of system, they'll see your install, and the one who takes it gets your contact details. If no one near Rockhampton takes it within 48 hours, installers elsewhere in Queensland may see it as well.
Questions for a Rockhampton installer
- Have you done a heat load on these rooms, and what outdoor temperature did you size for?
- How high will the outdoor unit and isolator sit on this block?
- Who's doing the electrical work, and what licence do they hold?
- What are your QBCC licence and RTA numbers?
- Where will the outdoor unit sit relative to the neighbours' bedrooms?
Before the installer comes
You can
- List the rooms you cool most, and when.
- Note which rooms take the afternoon sun.
- Find out how high floodwater has reached on your street, if it has.
Leave to a licensed installer
- The heat load and final size.
- Refrigerant pipework, leak testing and commissioning.
- New circuits and isolators, by a licensed electrician.
What we'd do
Our take for Rockhampton
We'd want an installer who fits reverse cycle systems every week to measure up, ask them to size for the hot end of January rather than an average day, and sort the insulation gaps first. On a flood-prone block, we'd lift the outdoor unit and its isolator above the known flood level from day one. Our Rockhampton page has more on the town's climate.
