You’ve already got the split system. It’s on the wall, it’s running, and it’s doing its job—sort of.
But if you’re still finding certain rooms stuffy in summer, or your energy bill keeps creeping up without explanation, the split system air conditioner probably isn’t the problem.
More often, it’s how it’s being used.
There are a handful of small, easy adjustments most homeowners never think to make. Not upgrades. Not repairs. Just simple changes that quietly add up to a much more comfortable home.
Here’s where to start.
Airflow Direction: The Setting Most People Ignore
This is probably the most overlooked feature on any split system—and it makes a surprisingly big difference.
Most units let you adjust the angle of the louvres. A lot of people set them once, forget about them, and wonder why the room never feels quite right. If you’re unsure how your unit should be set up, a quick check with a professional air conditioning technician can help.
In Summer
Cold air naturally sinks. When your system is cooling, angle the louvres upward so the cool air flows across the ceiling first and gradually settles down through the room. This gives you much more even cooling than blasting it straight ahead.
Pointing the airflow directly at people feels intense at first—but it cools the person, not the room. And the moment you step away, that effect disappears.
In Winter
Flip it. Warm air rises and gets trapped near the ceiling. Angle the louvres downward to push that warmth down into the space where you actually are.
It sounds counterintuitive, but you’ll notice the difference within minutes.
A Note on Swing Mode
Most remotes have a “swing” function that automatically oscillates the louvres back and forth. This is useful for distributing air across a larger space. If you’re cooling or heating a single area, though, manually setting the direction usually works better.
Temperature Settings: Small Numbers, Bigger Impact
There’s a common habit of cranking the temperature down as low as it goes in summer, or as high as it goes in winter. The thinking is: faster results.
It doesn’t really work that way.
Split systems reach your set temperature and then maintain it—they don’t speed up because you’ve dialled in an extreme number. What extreme settings do is push the system harder for longer, which shows up on your power bill.
The Sweet Spot
A quick consultation with a qualified air conditioning technician can help if you’re not sure how your unit should be configured.
If a room isn’t reaching a comfortable temperature at those settings, the issue is usually elsewhere—insulation, draughts, direct sun through windows, or a unit that’s undersized for the space.
One Degree at a Time
If you’re used to running your system at 18°C in summer (yes, it happens), try nudging it up by one degree every few days. Most people find they adapt quickly—and stop noticing the difference entirely within a week or two.
Cleaning Filters: The Five-Minute Job That Changes Everything
If there’s one thing on this list that makes an immediate, tangible difference, it’s this.
Filters capture dust, pet hair, and airborne particles whenever your system runs. Over weeks and months, they clog up—and when they do, the unit has to work much harder to push air through. You get less airflow, less efficiency, and more wear on the system overall.
It’s one of the most common reasons a split system that used to work well suddenly feels like it’s not doing much.
How Often?
Every two to four weeks during heavy use is a reasonable rule of thumb; if you have pets or live in a dusty area, lean toward the shorter end of that range.
How to Clean Them
It’s simpler than most people expect. The front panel of your indoor unit slides or clips open, and the filters slide out easily. A gentle rinse under lukewarm water is usually enough for most filters. Let them dry completely before sliding them back in—and that’s it.
Five minutes, maybe less. The difference in airflow can be noticeable immediately.
What About the Outdoor Unit?
Keep the area around the outdoor compressor clear. Leaves, garden debris, or overgrown plants blocking the unit restrict airflow, forcing it to work harder. A quick check every few months takes care of this.
Timing Your Usage: Work With the Day, Not Against It
When you run your split system, it matters almost as much as how you run it.
Many people wait until a room is already unbearably hot or cold before turning on the unit. The system then has to work at full capacity just to catch up, which takes longer, uses more energy, and rarely feels comfortable while it’s happening.
Start Early on Hot Days
On a hot summer day, turn the system on before the temperature peaks—usually mid-morning rather than mid-afternoon. Keeping a room cool is far less demanding than cooling it down from 32°C.
Close blinds and curtains on the sun-facing side of the house while you’re at it. Direct sunlight through glass can undermine even a well-sized system.
Use the Timer Function
Most split systems come with a timer, and most people never use it.
Set it to switch on 20–30 minutes before you get home, so you walk into a comfortable room rather than a hot one. In winter, the same logic applies—a bedroom that’s been warming for half an hour before you get into bed is a very different experience.
Turn It Off Before You Leave—Not When You Leave
If you’re heading out, switch the system off 10–15 minutes early. The residual cool or warm air in the room will maintain comfort for a while, and you won’t have to pay to condition the space.
It’s Not About the System—It’s About Using It Well
None of this is complicated. There’s no rewiring, no special tools, no technician needed.
Just a few small adjustments—most of which take minutes—that add up to a noticeably more comfortable home and a system that runs the way it’s supposed to.
Airflow direction. Temperature discipline. Clean filters. Smart timing.
Once you have these sorted, the difference tends to speak for itself.
And if you’re not sure whether your current system is actually the right fit for your home—or if it’s time for a service or upgrade—the team at Climat can help you work it out without the guesswork.