When the temperatures drop, many homeowners ask the same question:
“Does my aircon use more electricity in heat mode than a bar heater or gas heater?”
The answer may surprise you: modern inverter air conditioners are far more energy-efficient than most traditional heating methods — including electric bar heaters and even some gas units.
In this guide, we’ll break down the energy usage, costs, and performance differences between using an aircon in heat mode and running a bar or gas heater. This way, you can make an informed decision that saves energy and money this winter. Understanding aircon vs heater electricity consumption is vital for making cost-effective choices in winter heating.
🔥 Heat Mode on Air Conditioners: How It Works
Most modern air conditioners in South Africa — especially inverter models — use heat pump technology. Instead of creating heat like a bar heater, they transfer heat from the outside air into your home.
This method is significantly more efficient than direct heat generation.
Example:
- A 12000BTU inverter aircon typically uses 0.9 to 1.2kW/hour in heat mode.
- A standard 2kW bar heater uses 2.0kW/hour — almost double the electricity.
So if you’re using your aircon to heat a room, you’re already saving on power.
⚡ Power Usage Breakdown: Aircon vs Common Heaters
Let’s compare the average electricity consumption and cost per hour based on South Africa’s current energy rates (±R2.60 per kWh):
| Appliance | Avg Usage | Cost/Hour |
|---|---|---|
| Inverter Aircon (12000BTU) | 1.0 kWh | ± R2.60 |
| Bar Heater | 2.0 kWh | ± R5.20 |
| Oil Heater (medium) | 1.8 kWh | ± R4.68 |
| Fan Heater | 1.5 kWh | ± R3.90 |
👉 Using your aircon in heat mode can cut your heating costs by up to 50%.
🧯 What About Gas Heaters?
Gas heaters are a popular backup, but they come with their own costs and risks.
- A 9kg gas bottle costs around R300 and lasts about 30–35 hours, depending on the setting.
- That’s ±R8.50–R10/hour, which is more expensive than running an inverter aircon.
- They also require ventilation and carry carbon monoxide risks.
In contrast, an aircon offers consistent, safe, and thermostatically controlled heating.
Heating Quality Comparison: Understanding Aircon vs Heater Electricity Consumption
| Feature | Inverter Aircon | Electric Heater | Gas Heater |
|---|---|---|---|
| Energy Efficiency | ✅ High | ❌ Low | ⚠️ Medium (depends on usage) |
| Temperature Control | ✅ Thermostat + Timer | ❌ Manual or none | ❌ Limited |
| Coverage Area | ✅ Large rooms | ⚠️ Small areas | ⚠️ Medium rooms |
| Safety | ✅ No fire or gas risk | ❌ High surface heat | ⚠️ Needs ventilation |
| Noise | ✅ Quiet (especially at night) | ⚠️ Varies | ✅ Quiet |
💡 Pro Tips to Maximize Efficiency with Your Aircon in Heat Mode
- Use Sleep Mode or Auto Timer to reduce overnight usage
- Close doors and windows while heating
- Clean your filters monthly for best performance
💰 Bottom Line: Which Heating Option Saves You the Most?
If you already have an inverter air conditioner, it’s hands down the most efficient and cost-effective way to heat your home.
It delivers:
- Lower power bills
- Consistent, quiet heating
- Built-in temperature control
- Dual functionality for summer and winter
Compared to bar or gas heaters, an aircon pays off quickly — especially during cold months in South Africa.
👇 Looking for an Efficient Air Conditioner?
At Sucasa Air, we offer a range of top-rated inverter aircons from Samsung, Midea, and Alliance — all professionally installed with nationwide delivery and a 5-10-year compressor warranty (subject to annual maintenance).
📌 Final Thoughts
When comparing aircon vs heater electricity consumption, aircons win in nearly every category — from power usage to comfort and cost. Ultimately, the debate of aircon vs heater electricity consumption boils down to efficiency and savings. Don’t let the colder months spike your energy bill.
✔️ Invest in smart heating
✔️ Enjoy better control and comfort
✔️ Save more this winter
🔗 Learn More About Energy Consumption from Eskom
For more detailed comparisons and local insights, refer to Eskom’s Guide on Heating and Cooling Efficiency — South Africa’s official energy provider.