The first cold snap of the season hit on a Tuesday. The kind that makes the hallway tiles feel like ice and turns every trip to the bathroom into a small act of courage. You probably did what millions of us did: walked to the thermostat in your socks, hesitated for three seconds, then nudged it up… just a little.
On the screen, that now-famous number glowed back: 19 °C. The so‑called “right” temperature for heating a home. Sensible, eco-friendly, grown‑up. And yet your nose was cold, your kids were grumbling, and your partner was already wrapping up in a second sweater.
Behind that tiny screen, though, something has changed. Quietly, experts have started to move on from the 19 °C rule.
And their new recommendation might surprise you.
The 19 °C dogma is cracking: what experts say now
For years, 19 °C has been the moral benchmark. The temperature you were supposed to respect if you cared about your bill, the planet, and your conscience. The “good citizen” number.
Yet more thermal experts, doctors and energy agencies now say the strict 19 °C rule is too rigid. They argue that the right temperature isn’t a single magic digit, but a range, and that comfort, insulation and humidity count just as much.
The new consensus is settling around a slightly different figure: **around 20–21 °C in living areas**, a little less in bedrooms. Not as catchy as “19”, maybe. But far closer to what bodies, not spreadsheets, are asking for.
Energy researchers point out something we all feel: 19 °C doesn’t feel the same in an old, draughty flat as in a well-insulated new build. One thermal engineer I spoke to in Lyon told me he spends his days “correcting” people’s guilt.
He sees the same pattern. Families in 1970s apartments, poorly insulated, holding onto 19 °C but still shivering on the sofa. Elderly people who don’t dare raise the thermostat, afraid of being judged or ruined, yet sitting for hours in 18 °C, hands numb.
On the other side, he visits passive houses at 20.5 °C where people are in T‑shirts, with a stable humidity level and no cold walls. *Same air temperature, completely different sensation.*
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The logic, experts say, is simple. Our bodies don’t feel just the air temperature. They feel the temperature of walls, floors, drafts, clothing, and humidity. A poorly insulated home at 19 °C can feel like 17 °C to your skin.
That’s why many public health and energy organizations now converge on a more nuanced idea: around 20 °C for living rooms, 20–21 °C for rooms used by fragile people (babies, elderly, people with chronic illness), and 17–18 °C in bedrooms during the night. **The 19 °C rule was born in an era of urgency and simplification. Reality is messier.**
Some specialists even warn that for certain profiles, staying stubbornly at 19 °C can push the body into constant tension, raising fatigue levels and respiratory risks. Comfort isn’t a luxury word here, it’s a health variable.
The new rule of thumb: zones, habits and small moves
So if the old 19 °C dogma is fading, what should you actually do when you stand in front of the thermostat this winter? Engineers now speak much less about “one number” and more about “zones”. The new guideline is to think by room and by time of day, not by a single all‑purpose setting.
A very practical rule of thumb is emerging. Around 20–21 °C in the living room when you’re there. 18–19 °C in the kitchen where heated appliances add a few degrees. 17–18 °C in bedrooms, and 20–21 °C in the bathroom during use.
Rather than fighting with 0.5 °C every hour, experts suggest one simple gesture: set comfortable base temperatures, then program small, predictable drops when you’re away or asleep.
We’ve all been there, that moment when you come home to a freezing flat because you “turned everything down to save money” and now your bones hurt. The rebound effect is real: you end up cranking the heating way higher to warm up faster, and the system works overtime.
Specialists in building energy say the new smart strategy is moderation, not punishment. Lower by 1–2 °C at night in living areas, not by 5. Reduce the temperature when you go to work, yes, but without letting the walls chill completely.
Let’s be honest: nobody really reprograms the thermostat three times a day with military discipline. A stable, realistic setting you can live with beats heroic resolutions that last two days then vanish.
“Stopping obsessing over 19 °C is almost a psychological liberation,” admits a Paris-based energy consultant who works with both families and social housing providers. “The message now is: aim for reasonable comfort, then optimize around it instead of freezing out of guilt.”
- 20–21 °C in living spaces: for evenings on the sofa without double socks.
- 17–18 °C in bedrooms: enough for good sleep, with a real duvet.
- +1 °C for infants, seniors or sick people who spend long hours sitting.
- Check humidity: around 40–60% makes 20 °C feel a lot warmer.
- Upgrade habits before walls: close shutters, doors, and seal draughts first.
From number obsession to real comfort culture
Once you start listening to experts talk about heating, you notice something striking. They’re slowly moving the conversation away from “the right number” and toward “the right feeling”. Less about finger‑pointing on bills, more about how we inhabit our homes.
This winter, discussions around the new recommended temperatures will probably play out at the kitchen table. Between those who learned that 19 °C was a civic duty, and those who simply want to stop shivering. Between fear of the next bill and the quiet luxury of warm feet.
The real shift might be there: not in a new national slogan, but in thousands of small, negotiated degrees. A living room adjusted from 19 to 20 °C because the baby is on the playmat. A bedroom kept at 17 °C because someone finally discovered they sleep better that way. A grandparent convinced that yes, 21 °C is allowed for them.
The question lingers in the air, just like that first breath of warm air from the radiator: what temperature will you dare to choose this year, if the only real rule is comfort without excess?
| Key point | Detail | Value for the reader |
|---|---|---|
| New comfort range | About 20–21 °C in living rooms, 17–18 °C in bedrooms | Helps set realistic, healthier targets than a rigid 19 °C |
| Think by zone | Different rooms, different uses, different ideal degrees | Reduces waste without sacrificing daily comfort |
| Small, smart adjustments | Night and absence drops of 1–2 °C, not drastic cuts | Lowers bills while avoiding cold, damp homes |
FAQ:
- Is 19 °C still a good target for heating?It can be, but it’s no longer seen as a universal rule. Many experts now speak of a comfort range: roughly 20–21 °C in living spaces, with flexibility depending on insulation, age, and health. 19 °C is more of a minimum benchmark than a fixed obligation.
- What temperature do doctors recommend at home?Public health bodies often suggest about 20 °C in main rooms, 17–18 °C in bedrooms, and up to 21 °C for vulnerable people such as babies, elderly adults, or those with chronic illnesses, especially when they are inactive for long periods.
- Does turning the heating off during the day save more energy?Turning it off completely can backfire in poorly insulated homes, because the system must work much harder to heat up cold walls. Slight reductions of 1–2 °C during absences usually offer a better balance between comfort and savings.
- Why do 20 °C sometimes feel cold and sometimes warm?Because your body also feels wall and floor temperature, drafts, and humidity. A dry, insulated home at 20 °C can feel cozy, while a damp, leaky one at the same temperature can feel chilly, especially when you’re sitting still.
- How can I feel warmer without raising the thermostat too much?Use several levers at once: close shutters at night, seal drafts, add a rug on cold floors, keep humidity between 40–60%, and dress in light layers. Even a 0.5–1 °C rise combined with those habits can radically change how warm your home feels.