Gas vs. Reverse-Cycle Air Con: The 2026 Verdict for Australian Homes
For winter heating in 2026, a high-efficiency reverse-cycle air conditioner is significantly cheaper to run than a gas heater in every Australian state and territory. While gas heaters have a slightly lower upfront purchase price, the massive difference in running costs—driven by soaring gas prices and the incredible efficiency of modern air conditioners—makes reverse-cycle the clear winner for any household looking to reduce their energy bills this winter.
Recent energy price hikes have fundamentally changed the heating cost equation. The era of cheap gas heating is over. For households feeling the squeeze, switching from an older gas system to a new reverse-cycle air conditioner now offers not just long-term savings, but substantial upfront financial help through generous state government rebates.
The Real Cost of a Warm Home in 2026
To understand the true cost, we need to look at two things: the price to buy the appliance and the price to run it. Here’s how they stack up in 2026.
Upfront Costs: A Close Race
When you’re buying a new appliance, the ticket price is the first thing you see. Gas heaters often appear slightly cheaper on the shelf, but the gap is closing, especially for high-quality models.
| Appliance Type | Popular Model | Typical Purchase Price (2026) |
|---|---|---|
| Reverse-Cycle Air Con | Daikin Cora 7.1kW Split System | $2,000 - $2,300 (plus installation) |
| Portable Gas Heater | Rinnai Avenger 25 | $1,800 - $1,900 |
Prices are indicative and sourced from major Australian retailers in April 2026. Installation costs for split-system air conditioners can add $600 - $1,000+.
While the gas heater might save you a few hundred dollars initially, this saving is quickly erased by its higher running costs. Furthermore, significant rebates are available for installing reverse-cycle air conditioners, which often don’t apply to new gas heaters. For a deeper dive into improving your home’s thermal efficiency before buying a new heater, consider this guide on the best ROI for cutting your Australian winter energy bills in 2026.
Running Costs: Where Reverse-Cycle Wins Big
This is where the game is won and lost. A heater’s running cost is determined by its energy consumption and the price of that energy. In 2026, both factors heavily favour reverse-cycle air conditioning.
Why is reverse-cycle so much more efficient?
A gas heater creates heat by burning gas, a process that is, at best, around 80-90% efficient for a 5.8-star heater like the Rinnai Avenger. In contrast, a reverse-cycle air conditioner doesn’t create heat; it moves it. Using refrigerant, it extracts heat from the outside air (even on cold days) and transfers it inside. This process is incredibly efficient, often achieving 400-600% efficiency.
This efficiency is measured by the Coefficient of Performance (COP). A COP of 3.85, like on the Daikin Cora, means it produces 3.85 units of heat for every 1 unit of electricity it consumes.
Let’s compare the running costs per hour in an average NSW home:
By the Numbers: A reverse-cycle air conditioner can be more than four times cheaper to run per hour than a leading portable gas heater in 2026.
| Heater Type | Model | Energy Consumption (High) | Avg. Energy Price (NSW 2026) | Cost Per Hour (High Setting) |
|---|---|---|---|---|
| Reverse-Cycle Air Con | Daikin Cora 7.1kW | Approx. 2.08 kWh | ~36.5 c/kWh | ~$0.76 |
| Portable Gas Heater | Rinnai Avenger 25 | 25 MJ/h | ~4.3 c/MJ | ~$1.08 |
Calculations based on April 2026 energy price data. Electricity price from Finder and gas price from government data. Your specific costs will vary based on your retailer and plan.
Over a typical winter (90 days, 4 hours of use per day), the savings become substantial:
- Reverse-Cycle Air Con: 360 hours x $0.76/hr = $273.60
- Gas Heater: 360 hours x $1.08/hr = $388.80
That’s a saving of over $115 in just one winter, easily covering the potential difference in purchase price within two seasons. For households facing the predicted Australia’s 2026 Winter Gas Squeeze, these savings are more critical than ever.
State Rebates: Making the Switch Even Cheaper
State governments are actively encouraging households to move away from gas. In 2026, generous rebates are available, making the switch to a reverse-cycle air conditioner the smartest financial decision.
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Victoria (VEU Program): The Victorian Energy Upgrades program offers significant upfront discounts for replacing a gas heater with an efficient reverse-cycle system. Depending on the type of gas heater you’re replacing (flued, ducted, etc.), you could receive a discount of $900 to over $5,530. This discount is applied at the point of sale by an accredited provider, meaning you pay the lower price upfront.
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New South Wales (ESS): The Energy Savings Scheme (ESS) provides a similar upfront discount. Replacing an old air conditioner can net you a discount of up to $560, and replacing an inefficient gas system can lead to even larger savings, with some providers advertising discounts of over $2,000 for certain upgrades.
These rebates drastically reduce the upfront cost of a new reverse-cycle system, making the total cost of purchase and installation cheaper than a new gas heater in many cases.
Environmental Impact and Future-Proofing
Beyond the immediate cost savings, choosing a reverse-cycle air conditioner is a decision that future-proofs your home. As Australia moves towards a renewable energy grid, electrifying your home heating becomes a more sustainable choice. Gas is a fossil fuel, and its future in Australian homes is uncertain, with some jurisdictions moving to phase out new gas connections.
Pairing a reverse-cycle air conditioner with a rooftop solar system can reduce your winter heating costs to nearly zero—an outcome impossible with a gas heater. As energy relief measures end, preparing for higher bills is crucial. For more tips, see our guide on how to prepare for higher power bills in Australia in 2026.
Bottom Line
For winter heating in 2026, the reverse-cycle air conditioner is the undisputed champion of cost-effectiveness.
While a gas heater may seem slightly cheaper on the shelf, this small initial saving is a false economy. The combination of sky-high running costs for gas, the incredible energy efficiency of modern reverse-cycle air conditioners, and substantial government rebates makes the electric option the clear winner.
If you are running an old gas heater, the single most effective thing you can do to lower your winter energy bills is to take advantage of the 2026 government incentives and upgrade to a high-efficiency reverse-cycle air conditioner. You’ll get a cheaper, more efficient, and more environmentally friendly heating solution that also provides cooling in summer.