​Ducted vs Multi-Split Air Conditioning: Which Suits Your Brisbane Home?When it's time to cool (or heat) a whole home, the two main options are a ducted system or a multi-split (multiple indoor heads on one outdoor unit). Both work well in Brisbane conditions — the right choice depends on your home, budget and how you use the space.
Ducted air conditioning

• One outdoor unit feeds ductwork hidden in the ceiling, with discreet vents in each room
• Cleaner look — no visible indoor units
• Zoning lets you run only the areas in use
• Best suited to new builds or larger renovations, since ducting needs ceiling space
• Higher upfront cost, but seamless whole-home coverage

Multi-split systems

• One outdoor unit connects to 2–5 indoor wall units, placed room by room
• Each room can be run independently, so you're only cooling occupied spaces
• Easier and cheaper to retrofit into an existing home — no major ceiling work required
• Indoor units are visible on the wall in each room

Which one fits your home?
As a rough guide: if you're renovating or building new, ducted often makes sense for a clean, whole-home solution. If you're retrofitting an existing Brisbane home and want lower upfront cost with room-by-room control, multi-split is usually the more practical option.
Not sure which is right for you? Manta Ray Electrical installs both ducted and multi-split systems across Brisbane and can assess which suits your home and budget. Call 0402 115 672 for a free quote.

5 Signs Your Switchboard Needs UpgradingYour switchboard is the control centre for every circuit in your home. Many older Brisbane homes still run on outdated boards that weren't built for today's number of appliances, air conditioners and safety standards. Here's what to look out for.
1. Your safety switch keeps tripping Occasional trips can be normal, but frequent trips usually point to an overloaded circuit or an ageing board struggling to keep up.
2. You still have a ceramic fuse box If your switchboard uses old rewireable ceramic fuses rather than circuit breakers, it likely predates modern safety switch requirements.
3. No safety switches (RCDs) at all Modern QLD homes are required to have safety switches on power and lighting circuits. If yours doesn't, it's overdue for an upgrade.
4. Lights flicker when appliances turn on This can indicate the board is under strain from the home's total electrical load, especially in homes that have added air conditioning or an EV charger without a corresponding upgrade.
5. You're planning a renovation or adding a big appliance Adding a ducted air conditioning system, EV charger, or pool equipment is a common trigger for switchboard upgrades — it's worth checking capacity before, not after, the new load goes in.
Not sure if your switchboard needs attention? Manta Ray Electrical inspects and upgrades switchboards across Brisbane. Call 0402 115 672 for an assessment.

How to Choose the Right Size Split System for Your Brisbane HomeOne of the most common mistakes we see in Brisbane homes is a split system that's the wrong size for the room. Too small, and it runs constantly without ever quite cooling the space. Too big, and it cycles on and off, wasting energy and leaving the room feeling clammy.
Why size matters more than brand
A well-known brand won't fix a poorly sized system. Capacity, measured in kilowatts (kW) of cooling output, needs to match the room — not just its floor area, but its ceiling height, insulation, window size and which direction it faces.
Rough sizing guide for Brisbane rooms

• Small bedroom (10–15m²): around 2.5–3.5kW
• Living room (20–30m²): around 5.0–6.0kW
• Open-plan living/dining (35–50m²): around 7.0–8.5kW

These are starting points only — a west-facing room with lots of glass will need more capacity than a shaded, well-insulated one of the same size.
Why a proper assessment beats a rule of thumb
Brisbane's humidity and long, hot summers mean undersizing is a common and costly mistake. We measure the room, check insulation and orientation, and size the system to run efficiently rather than flat-out all day.
Thinking about a new split system? Manta Ray Electrical installs single and multi-head split systems across Brisbane. Get in touch for a free assessment and quote.