How to Stay Warm This Winter Without Blowing Your Power Bill

Winter in Australia has a familiar rhythm: the first real cold snap, the scramble for the heater, and then, a few weeks later, the power bill that makes you sit down. Heating is one of the biggest drivers of winter electricity use in Australian homes — and it’s also the cost with the most room to move. Staying warm for less isn’t about heroic frugality, or sitting in the dark wearing a beanie indoors. It’s a handful of small, unglamorous, effective choices, and they all flow from one principle.

Heat the person, not the room

A space heater warms the entire volume of air in a room — including all the air near the ceiling that nobody is using — and the moment it switches off, that warmth starts leaking away through the windows, the gaps and the walls. Warming yourself directly costs a fraction as much, because a body is a far smaller thing to keep warm than a room.

That’s the whole trick. Everything below is just a way of applying it.

The arithmetic, out in the open

Numbers first, with the assumptions stated so you can check them against your own bill.

A portable space heater: a typical plug-in heater draws around 2 kW. Run it through a four-hour evening and that’s 2 kW × 4 h = 8 kWh. At a typical rate of 35 cents per kWh, that’s about $2.80 for the evening — and in the region of $250 if you did it every night of a ninety-night winter.

An electric hot water bottle: a roughly 400 W element charging for about ten minutes uses 400 × (10 ÷ 60) ≈ 0.07 kWh — call it two to three cents per charge. Ninety nights of charges comes to a couple of dollars for the entire season.

Two honest caveats. First, thermostat-controlled heaters cycle on and off, so real-world use is often less than the full 8 kWh — and reverse-cycle air conditioning is considerably more efficient than a plug-in element heater. Second, nobody is claiming a hot water bottle heats a house. It doesn’t. The saving comes from being warm enough, sooner, that the heater can run less, later or lower. But the gap between cents and dollars is wide enough that even a rough version of this habit shows up on a bill.

Layer like you mean it

Warm air trapped between layers does the same job as any insulation, and it’s free. Three thinner layers beat one heroic jumper, because each boundary traps its own pocket of air. Wool and merino hold their warmth deep into the evening. Socks or slippers matter more than seems reasonable, because cold feet have a way of making the whole evening feel cold. And a blanket that permanently lives on the couch removes the only barrier to using one — having to go and get it.

Draught-proof the obvious gaps

Draughts are the quiet thief: warm air out, cold air in, all night long. The fixes are cheap and mostly one-off. A door snake — or a rolled towel — under the doors you actually use. Curtains drawn at dusk, before the day’s warmth has left, because uncovered glass sheds heat remarkably fast. Rugs on hard floors. If you can feel moving air with the back of your hand near a window frame or a skirting board, that’s a gap worth dealing with this weekend.

Time and target the heating you do use

Most of us still run some heating through winter, and that’s fine — the aim is to make it work a smaller space for a shorter shift. Close the doors and heat the room you’re in, not the hallway. Nudge the thermostat down a degree or two; every extra degree costs more, and under a blanket you genuinely won’t miss it. Switch off earlier than feels natural, too: a warm body under layers takes a long time to notice a room slowly cooling — especially with something warm on your lap.

The warm-body basics

The rest is old wisdom that happens to be free. A warm drink in hand does more for how an evening feels than a warm ceiling ever will. Cooking something slow warms the kitchen as a side effect. And the bed trick is the best of the lot: slip something warm under the covers ten minutes before you turn in — an electric hot water bottle like The Cocoon is charged in about the time it takes to tidy the kitchen — then switch everything else off and let the doona do its job overnight.

Warm, not spartan

None of this asks you to be cold. That’s the point: warmth where you actually feel it, sums you can check against your own bill, and a heater that works a shorter shift. If you’re weighing up whether a plug-in bottle or the old rubber kind belongs in your toolkit, we’ve written an honest comparison of electric and traditional hot water bottles. And for everything else about how they work — running costs, care, the questions everyone asks — start with our complete Australian guide.