Do Hisense and Samsung Aircons Use a Lot of Power?
Hisense and Samsung aircons do use electricity, but a correctly sized inverter model should not be the power monster many people imagine. The real running cost depends less on the badge on the front and more on the unit size, inverter technology, room insulation, set temperature, maintenance, and how many hours the aircon runs each day.
This guide explains what affects aircon electricity use in South African homes, how Hisense and Samsung compare, and what you can do to keep cooling and heating costs under control. It is written for everyday buyers who want comfort without watching the prepaid meter drop faster than it should.
An aircon uses the most electricity when the compressor is working hard to cool or heat a room quickly. Once the room reaches the set temperature, a modern inverter aircon reduces output and uses less power to maintain comfort.
That is the main difference between older fixed-speed units and modern inverter units. A fixed-speed compressor switches on at full power, then switches off, then switches on again. An inverter compressor slows down and speeds up as needed, which usually gives steadier comfort and lower electricity use over longer running periods.
For most South African homes, the question is not simply “does an aircon use electricity?” It is:
A small, efficient inverter aircon in a well-insulated bedroom can be surprisingly economical. The same unit in a hot, uninsulated, west-facing room with open doors will work much harder.
Aircon electricity use is not fixed. Two people can buy the same model and get very different running costs depending on how and where it is used.
| Factor | Why it matters | What to do |
|---|---|---|
| Room size | Bigger rooms need more cooling capacity | Use the BTU Calculator before buying |
| Unit size | Oversized and undersized units both waste energy | Match BTU to room size and heat load |
| Inverter technology | Helps the compressor run at variable speed | Choose inverter where budget allows |
| Set temperature | Lower cooling settings increase runtime | Aim for 24–26°C in cooling mode |
| Insulation | Poor insulation lets heat in faster | Close curtains, seal gaps, reduce heat gain |
| Sun exposure | West-facing rooms heat up heavily in afternoon | Use blinds, curtains, or external shading |
| Filter condition | Blocked filters reduce airflow and efficiency | Clean filters every 2–6 weeks |
| Usage hours | More hours means more kWh used | Use timers and sleep mode |
If you are comparing Hisense and Samsung, these factors matter more than brand alone. Both brands offer inverter wall-split units, but the correct model, capacity, and installation will decide the final electricity cost.
At comparable capacity and efficiency level, Hisense and Samsung inverter aircons should use broadly similar amounts of electricity. The difference usually comes down to the exact model, energy rating, compressor control, smart features, and how the unit is used.
Hisense is generally positioned as a strong value option. It suits buyers who want inverter efficiency, reliable cooling, and a more accessible purchase price. Samsung is usually more feature-rich, especially on models with WindFree operation and SmartThings control. Those comfort and control features can help reduce waste when used properly.
| Comparison point | Hisense aircons | Samsung aircons |
|---|---|---|
| Typical market position | Value-focused inverter cooling | Premium inverter cooling and comfort features |
| Running cost | Model-dependent, generally efficient on inverter units | Model-dependent, strong efficiency on inverter and WindFree models |
| Smart control | Available on selected models | Stronger smart ecosystem on selected models |
| Comfort features | Standard cooling and heating functions on many models | WindFree comfort available on selected models |
| Best fit | Budget-conscious homes and everyday rooms | Bedrooms, offices, and users who value comfort control |
The important point: do not assume Samsung automatically uses more power because it is a premium brand, and do not assume Hisense is less efficient because it is usually more affordable. Always compare the specific model’s capacity, inverter status, energy label, and room suitability.
Inverter technology is one of the biggest reasons modern aircons are more efficient than older units.
A non-inverter aircon works like a light switch. The compressor is either off or running at full capacity. This creates repeated power spikes and temperature swings. An inverter aircon works more like a dimmer switch. It can slow down once the room is comfortable, using only the output needed to maintain the temperature.
This matters in South African homes because aircons often run for long periods during summer afternoons, warm coastal nights, or cold Highveld mornings. In those conditions, the unit is not always trying to cool from scratch. Much of its work is maintaining a stable temperature.
That is where inverter aircons perform best.
They also tend to be quieter because the compressor does not restart as aggressively. For bedrooms and home offices, that comfort difference is often just as important as the electricity saving.
For a deeper technical comparison, read the inverter vs non-inverter aircon guide.
The simplest way to estimate running cost is to look at the unit’s input power in kilowatts and multiply it by your electricity tariff.
Use this formula:
Running cost per hour = kW input × electricity rate per kWh
For example, if an aircon draws 0.8 kW while running and your electricity rate is R3.00/kWh, the cost is:
0.8 × R3.00 = R2.40 per hour
That does not mean the aircon will draw 0.8 kW every minute it is switched on. An inverter model usually draws more at startup and less once the room reaches temperature. In steady operation, the compressor may drop significantly below its rated input depending on room conditions.
| Example use case | What usually happens |
|---|---|
| First 20–40 minutes | Unit works hardest to bring the room to temperature |
| Stable room, doors closed | Inverter reduces output and maintains temperature |
| Doors/windows open | Unit works harder and uses more electricity |
| Very low set point, e.g. 18°C | Longer compressor runtime and higher consumption |
| Sensible set point, e.g. 24–26°C | Lower load and better efficiency |
Use your own electricity tariff for the final calculation. Prepaid and postpaid users may pay different effective rates depending on municipality, block tariff, fixed charges, and usage band.
For cooling, 24–26°C is the practical sweet spot for most South African homes. It is cool enough to feel comfortable, but not so cold that the compressor runs unnecessarily hard.
Setting the unit to 18°C does not make the room cool “better”. It simply forces the aircon to keep chasing a much lower target. The room may still take the same time to cool down, but the compressor runs longer and uses more electricity.
A better approach:
For bedrooms, try 25°C with sleep mode before assuming you need a colder setting. Many people are comfortable once humidity drops and the air starts moving, even if the number on the remote is not extremely low.
A correctly sized aircon is usually the most efficient aircon.
An undersized unit runs too hard for too long because it cannot remove heat fast enough. An oversized unit cools quickly, switches down or off, then repeats short cycles. This can reduce comfort, increase wear, and waste electricity.
BTU is the cooling capacity of the aircon. Common residential sizes include 9,000 BTU, 12,000 BTU, 18,000 BTU, and 24,000 BTU. Bigger BTU models can cool larger spaces, but they also have higher potential electricity draw.
| Room type | Common consideration |
|---|---|
| Small bedroom | Usually needs a smaller BTU unit |
| Medium bedroom or study | Often needs a mid-size wall split |
| Lounge | Needs sizing based on floor area, ceiling height, and sun exposure |
| Open-plan area | Needs careful sizing because heat moves between spaces |
| West-facing room | May need extra allowance due to afternoon heat load |
Before choosing between Hisense and Samsung, confirm the correct size first. The most efficient brand choice will not save you if the unit is badly matched to the room.
Use the BTU Calculator to check your room before buying.
You do not need to suffer through heat to save electricity. Most savings come from small usage habits that reduce how hard the unit has to work.
Every degree colder usually means more compressor work. If the room feels stuffy at 24°C, check airflow, humidity, sun exposure, and filter condition before dropping the set point dramatically.
An aircon is designed to condition a contained space. Cooling a room while hot air keeps entering is like filling a bath with the plug out.
Blocked filters restrict airflow. The unit then runs longer to achieve the same result. For typical home use, clean filters every 4–6 weeks. In dusty areas or daily-use rooms, check them more often.
Direct afternoon sun can undo a lot of cooling work. This is especially important for west-facing bedrooms and lounges in Gauteng, the Free State, Limpopo, and the Northern Cape.
Do not run the unit all night at a low set point if the room only needs a temperature drop before sleep. Sleep mode usually adjusts the set point gradually while keeping the room comfortable.
Dirty coils, low refrigerant, blocked drains, and worn fan components all reduce efficiency. A clean, serviced unit runs closer to its rated performance.
Choose Hisense if you want a good balance of inverter efficiency and upfront value. It is a sensible option for spare bedrooms, rental properties, family rooms, and buyers who want reliable comfort without paying for premium smart features.
Choose Samsung if you value advanced comfort control, strong smart-home integration on selected models, and options such as WindFree cooling. Samsung can be especially attractive for bedrooms, home offices, and living spaces where draught-free comfort matters.
Either way, the running cost comes down to the same fundamentals: correct BTU sizing, inverter technology, sensible settings, proper installation, and regular maintenance.
Hisense and Samsung aircons can use a noticeable amount of electricity, but correctly sized inverter models are designed to manage power use efficiently. The biggest drivers are room size, set temperature, insulation, usage hours, and whether the unit is maintained. A modern inverter unit should use the most power when cooling or heating from startup, then reduce output once the room reaches temperature.
Samsung is not automatically more expensive to run than Hisense. At the same BTU size and efficiency level, running cost should be broadly similar. Samsung models may offer more advanced comfort and smart-control features, while Hisense often offers strong value at a lower upfront price. Always compare the exact model’s energy label, inverter status, and suitability for the room.
Multiply the aircon’s input power in kilowatts by your electricity rate per kWh. For example, a unit drawing 0.8 kW at R3.00/kWh costs about R2.40 per hour while drawing at that level. Inverter aircons do not draw the same power constantly, so this calculation is a useful estimate rather than an exact bill prediction.
A cooling setting of 24–26°C usually gives the best balance between comfort and electricity saving. Lower settings force the compressor to run longer, especially in hot rooms with poor insulation or direct sun exposure. For night use, try 25°C with sleep mode before dropping the set point further.
Yes, an inverter aircon usually uses less electricity over longer running periods than a fixed-speed non-inverter unit. It adjusts compressor speed based on the room’s cooling or heating need instead of repeatedly switching on and off at full power. This is especially useful in bedrooms, lounges, and offices where the aircon runs for several hours at a time.
Your aircon may use more electricity than expected if it is the wrong size, the filters are dirty, the room gets heavy sun, doors or windows are open, or the set temperature is too low. Poor installation and lack of maintenance can also increase consumption. Start by cleaning the filters, checking room sealing, and raising the set point to 24–26°C.
Short-form guide | 3 min read | Category: Product Help → Energy & Efficiency
You can estimate your aircon running cost with a simple formula. You need two numbers: the unit’s input power in kilowatts and your electricity rate per kWh.
Look for the input power on the product specification sheet or energy label. It may be shown in watts or kilowatts.
If it is shown in watts, divide by 1,000.
800W ÷ 1,000 = 0.8 kW
Use the rate from your municipal bill or prepaid tariff. This varies by area and usage band, so use your actual rate where possible.
kW input × electricity rate × hours used = estimated cost
Example:
0.8 kW × R3.00 × 4 hours = R9.60
That estimate assumes the unit draws 0.8 kW for the full four hours. In real use, an inverter aircon often draws less once the room reaches temperature.
Your estimate will be higher if the room is hot, sunny, badly insulated, or the set point is too low. It will be lower if the room is shaded, well sealed, correctly sized, and maintained.
For best results, size the unit properly before buying and use a sensible cooling setting of 24–26°C.
Related: Full guide to Hisense and Samsung aircon electricity use | Use the BTU Calculator