The Five-Second British Gas Trick to Warm Your Home This Winter

The first genuinely cold evening tends to creep up quietly across Britain.

One day it’s mild and grey; the next, your breath clouds the air in the hallway and the kitchen floor feels like ice underfoot. You find yourself in front of the thermostat, thumb poised, aware that one tiny press could send the monthly costs rising again. With energy prices still stinging, that little plastic control can feel oddly weighty.

Up and down the country, people are swapping small “hacks” in WhatsApp chats and on Facebook-anything that keeps the chill off without giving in to the boiler. British Gas, one of the best-known suppliers, has now started pushing something almost comically simple: a five-second habit that can make your home feel warmer without switching the heating on.

Five seconds. No gadgets. No tools.

Why a five‑second trick suddenly matters

Imagine a Tuesday in November: it’s dark by 4:30pm, you’re still wearing your coat indoors, and the windows have a faint mist from your breath and a half‑boiled kettle. You open your energy app and watch last month’s usage curve upwards like a slow, stubborn tide. Part of you is shivering; the other part is bracing for the next bill.

That’s the pressure British Gas is responding to with its recent run of winter advice. The focus isn’t only on new boilers or smart controls-it’s on tiny actions you can do in the time it takes the kettle to click off. The sort of basics you’d normally dismiss for being too obvious, even though they’re often where savings are actually found.

A British Gas adviser referred to winter 2023–24 as “the season of micro-choices”. Households shaving a minute off showers. Parents turning radiators down a single notch in rooms nobody uses. People timing the oven so they can leave the door ajar once it’s off, letting the remaining heat drift into the kitchen. Small, slightly awkward routines that quietly move the needle on the meter. The five‑second trick belongs in that same category: quick, unshowy, and surprisingly effective.

You can see the change on an ordinary street if you look at the windows. More curtains are being pulled shut long before dinner-not just for privacy. Homes are being turned into soft, fabric cocoons to keep warmth indoors. A survey frequently referenced by British Gas suggests households can waste hundreds of pounds each year on heat that escapes through gaps, draughts and glass-money spent on warmth you never get to feel.

Karen, a 42‑year‑old teaching assistant in Leeds, knows the feeling. Last winter she held her thermostat firmly at 19°C, yet still saw her direct debit rise. This year she followed simple guidance she heard on the radio from a British Gas expert: change what you do with curtains and blinds the moment daylight changes. No new kit. No clever devices. Just better timing.

She began “chasing the sun” around her flat: curtains wide open as soon as it’s light, then pulled tight the instant daylight fades. On brighter days her small living room feels unexpectedly snug, even with the radiators staying off until early evening. The smart meter still jumps once the heating starts, but the time before that jump has clearly shortened. It isn’t magic-it’s simply cutting waste.

Energy specialists have long pointed out a stubborn fact: a lot of heat is lost through windows and doors. British Gas often notes that up to a fifth of a home’s heat can disappear through glass alone, especially in older properties with thin panes or worn seals. So, how you manage those surfaces can change how comfortable you feel without touching the thermostat.

At its heart, the five‑second trick is about taking advantage of heat you get for free. Even weak winter sunshine still carries warmth. When daylight hits furniture, walls and floors, they store it and release it later like slow, gentle radiators. That’s basic physics, not lifestyle fluff. The point isn’t only the temperature you set-it’s how long your home can keep hold of the warmth it naturally gains.

The five‑second British Gas trick to warm your home

The main action is almost absurdly simple: open and close your curtains or blinds at the right times. British Gas advisers keep repeating the same message-pull them wide open as soon as it’s light, then close them as soon as natural light drops. Done properly, it takes around five seconds and can influence how the evening feels.

In the morning, letting sunshine pour in allows rooms to absorb every bit of free warmth. Even a pale winter sun can lift the surface temperature in a space by a couple of degrees over the day. Then, once dusk arrives, shutting curtains quickly creates an extra insulating layer, keeping that warmth inside rather than letting it drain through cold glass.

Treat curtains as a low‑cost thermal jacket for your windows. Thick, lined curtains do the most, but even lighter ones help by giving heat less chance to escape. On bright days, invite in as much light as possible; on dark evenings, trap it. Two quick movements a day-morning and dusk-are the whole trick British Gas returns to.

Where people often go wrong is leaving it too late. Curtains get pulled half‑heartedly at 9pm, when the room already feels like a fridge. By then, much of the warmth has already leaked out into the night. For the habit to work, dusk has to be treated like a deadline: the moment light starts fading and the outdoor temperature drops, it’s time.

Another easy mistake is letting heavy curtains or furniture block radiators. British Gas has warned that long curtains hanging over a radiator can act like a blanket-over the heater, not the room-so warmth gets trapped behind fabric instead of spreading into the space you actually use. Nudge sofas slightly away from radiators, and tuck curtains behind the sill where possible.

Let’s be honest: hardly anyone remembers to do this every single day. Life gets hectic-you dash in with shopping, children, work messages-and curtains become background noise. That’s why the five‑second rule is useful: attach it to something you already do. Open them with your first coffee. Close them when you turn on the first lamp. Easy, repeatable, realistic.

A British Gas energy expert summed it up neatly:

“You don’t have to live in a freezing home to cut your bills. Use the heat you’ve already paid for, and stop it escaping. Curtains are one of the cheapest tools most people already own – they just don’t use them like it.”

This tiny habit also sits alongside a wider set of often‑forgotten winter routines. British Gas and independent advisers regularly talk about creating a “heat routine”-small actions that add up. In that spirit, here’s a practical snapshot of other moves that pair well with the five‑second trick:

• Fully open curtains on south‑facing windows during daylight to maximise free solar gain.
• As dusk arrives, close curtains and internal doors to keep warmth in rooms you’re actually using.
• Fit draught excluders along the bottom of doors to stop cold air slipping in.
• Bleed radiators once or twice each season so they heat consistently.
• Reduce the thermostat by 1°C in rooms you rarely use and prioritise warmth where you are.

None of this is glamorous, and it’s certainly not an Instagram trend. But alongside that small daily reflex-curtains open with the day, closed with the dark-it can make a cold house feel more liveable without constantly staring down an alarming bill.

A new way of thinking about warmth at home

What British Gas’s five‑second advice really highlights is a quiet change in what “comfort” means. Not long ago, staying warm was about reaching a number-20°C, 21°C, sometimes higher-and letting the boiler run for hours. Now, more people are asking a gentler question: does this room feel comfortable right now, for what I’m doing?

That’s why these micro‑habits resonate. They offer a sense of control that goes beyond money, even if the bill is what sparks the change. Pulling curtains at dusk, sliding a draught excluder into place, moving a chair into the brightest patch of the room-these are physical responses to an invisible issue. They give form to something that otherwise exists only in kilowatt‑hours and cold toes.

On a human level, the five‑second trick is almost a symbol: it asks you to notice your home again. To pay attention to where the light lands and where the chill creeps in. On streets where the houses share the same brickwork and similar windows, the families who fine‑tune these details will feel the difference first when the next cold snap arrives. And word spreads-neighbour to neighbour, WhatsApp group to WhatsApp group.

Most of us have experienced visiting someone in an old, draughty terrace that somehow feels warmer than our own place, even with a lower thermostat. Curtains pulled early. Cushions stacked in the cosiest corner. Doors shut so the heat stays in one lived‑in room. It isn’t mystery-it’s attention. And that, in the end, is what this five‑second suggestion is really about.

This winter, talk of heating won’t go away. Prices, policy and politics will all play their part. Still, beneath that noise, small daily actions will decide whether your living room feels like a refuge or like a waiting room. The British Gas curtain trick is one example: specific, slightly old‑fashioned, and quietly useful.

Perhaps you’ll test it tonight as the daylight starts to fade. Perhaps you’ll find the room holds onto warmth a little longer before the familiar dance with the thermostat begins again. Perhaps you’ll mention it to someone else-not as a grand “energy strategy”, but as a small, lived detail for getting through another British winter.

Key point	Detail	Why it matters to you
Curtain timing	Open fully in daylight, close as soon as night falls	Capture free warmth from the sun and reduce heat loss through windows
“Micro‑energy” habits	Repeatable small actions: keep doors shut, move furniture away from radiators, hunt down draughts	Lower the bill without completely giving up comfort
Comfort you feel, not a target number	Think in terms of a room feeling pleasant rather than the displayed temperature	Regain a sense of control over your home and your budget

FAQ:

• What is the five‑second British Gas trick, exactly?
  It’s the routine of flinging curtains or blinds fully open as soon as it’s light, then closing them as soon as daylight fades, so you collect daytime warmth and keep it in after dark.
• Will it genuinely make a difference you can feel?
  In plenty of homes, yes. It won’t replace heating during very cold spells, but it can help rooms stay comfortable for longer and slightly cut how often-or how high-you need to run the boiler.
• Do I need thermal curtains for it to work?
  Lined or thermal curtains can help more, but ordinary curtains or blinds still add insulation and can reduce draughts across cold glass.
• If I do this, should I still put the heating on?
  The aim isn’t to never use heating. It’s to waste less of the heat you do pay for, so you can stay comfortable with lower settings or fewer hours of heating.
• What other quick tips work well with the curtain habit?
  Keep internal doors closed, pull furniture away from radiators, block obvious draughts, and focus heat on the rooms you actually use instead of trying to warm the whole home evenly.

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