How to Cut Your Winter Heating Bills in Melbourne (2026 Guide)

A gas heater burns fuel and converts 80 to 92 percent of it into heat. That is the ceiling. No burner, however well made, can produce more energy than the fuel contains.

A reverse cycle system does something different. It does not make heat, it moves it, collecting warmth from the outside air and delivering it indoors. That is why it returns 3 to 4 units of heat for every unit of electricity it consumes. The gap between a ceiling of 0.92 and a return of 3 to 4 is the entire reason the running costs differ so much.

In cents, that works out at roughly 28 to 36 cents an hour to heat a room with reverse cycle, against 50 to 72 cents an hour for ducted gas. Across a Melbourne winter that lands between $200 and $450 a year for most households, and more if the change also lets you drop the gas connection and its daily supply charge.

A split system installed runs $2,500 to $7,500 depending on capacity and how many indoor heads are involved. A single head in a living room sits near the bottom of that. A multi head system covering a living area and two bedrooms sits nearer the top.

Victorian Energy Upgrades discounts come off the installation invoice directly rather than being claimed afterwards, and there is no income test. The property must be at least two years old. Because the discount is applied to the invoice, there is no waiting period and nothing to submit once the job is done.

One honest caveat. The VEU program changed on 30 September 2026, so the amount should be confirmed in writing at quote time rather than taken from a figure someone quoted last season. We put the current number on the quote and update it if it moves before the work goes ahead.

Putting an efficient heater into a leaky house is like filling a bath with the plug out. Two things dominate heat loss in Melbourne homes, and both are cheaper to fix than the heater is to replace.

Up to 25 percent of winter heat loss goes out through draughts. Gaps under external doors, unsealed exhaust fans, open chimneys, poorly fitted downlights, weep holes, and the gaps around old window frames all contribute. None of it is glamorous work and most of it is within reach of a weekend and a hundred dollars of materials.

Ceiling insulation can save up to 20 percent. If your roof space has no batts, or has old batts that have compressed, settled or been disturbed by tradespeople over the years, that is one of the highest return fixes available on an older Melbourne house. It also works in summer, which doubles the value.

Set your thermostat between 18 and 20 degrees. Every degree above that adds up to 10 percent to the running cost, because the system has to work against a larger difference to the outside air for longer.

The other common mistake is treating a thermostat like an accelerator. Setting 28 degrees does not heat the room any faster than setting 20. The system runs at its capacity either way. All the higher setting does is keep it running past the point where you were comfortable, then overshoot.

For an inverter system, steady is better than aggressive. These units are most efficient idling at low speed maintaining a temperature, not blasting from cold twice a day. Running it at 19 or 20 during the hours you are home generally beats switching it off and reheating the house from scratch each evening.

Peak heating season runs June to August, and that is exactly when every heating contractor in Melbourne is booked out and every heater in the city decides to fail. It is the worst time to be making a considered decision about a replacement system.

The better approach is to assess in autumn. If your heater is over ten years old, if the running cost has become noticeable, or if it needed a repair last winter, that is the time to get a quote and choose a system on the merits rather than on who can attend tomorrow. It also means the work happens when installers have availability, which is generally when you get their best attention.

If you are working through this over a couple of years rather than all at once, the order matters. Seal the draughts first, because it is the cheapest and it reduces the capacity you need from whatever heater you end up with. Fix the ceiling insulation second, for the same reason and because it pays back in summer too.

Change the heater third, once the house is holding heat, so the system can be sized for the improved building rather than the leaky one. Sizing to a draughty, uninsulated house means paying for capacity you will not need afterwards, and an oversized system cycles rather than running steadily, which costs efficiency and comfort.

Adjust the thermostat habit throughout, because it costs nothing and it is the only item on this list that takes effect the same evening.

Once the heater, the draughts and the thermostat are dealt with, the remaining winter savings are individually modest but collectively worth having.

Heat the rooms you are in. Closing internal doors is free zoning, and on a ducted system a properly set up zone controller does the same thing automatically. Heating a hallway and three empty bedrooms costs the same per hour as heating the room the family is actually sitting in.

Use the curtains. Heavy curtains that reach the floor and are sealed at the top with a pelmet stop the convection loop that pulls warm air down a cold pane and along the floor. Open them on a sunny winter afternoon to let free heat in, and close them before dusk to keep it.

Check the filters. A blocked filter on a split system or a ducted unit makes the fan work harder to move less air, which shows up as poor performance that people mistake for an undersized system. It is a five minute job and it is the most commonly neglected piece of maintenance on any heating system.

Not every household can spend $2,500 to $7,500 in the same year the heating bill arrives, and the good news is that most of the building side improvements do not depend on the appliance at all.

Draught sealing and ceiling insulation both work with whatever heater you currently have. Up to 25 percent of heat loss through draughts and up to 20 percent through the ceiling are figures that apply to a gas furnace exactly as much as to a heat pump, and doing them first means that when you do change the heater, you can size it for a house that holds heat rather than one that leaks it.

The thermostat habit costs nothing at all. Setting 18 to 20 degrees instead of 24 removes up to 10 percent per degree from the running cost of your existing system, starting the same evening you change it.