For years, 19°C (66°F) has been promoted as the “perfect” indoor temperature—comfortable, economical, and healthy. But according to recent expert insights, this one-size-fits-all rule is now considered outdated. The truth is, each room in your home has different temperature needs, and adjusting them correctly can improve comfort, health, and energy efficiency.
The image highlights this shift: a thermostat set to 19.3°C marked with a red “X,” symbolizing that this old standard may no longer be ideal.
Why 19°C Is No Longer the Best Choice
Experts now agree that comfort depends on activity level, room function, humidity, and time of day. A single temperature for the entire house can lead to:
- Feeling cold in living areas
- Poor sleep quality
- Higher energy consumption
- Dry air and respiratory discomfort
Instead, modern recommendations focus on room-by-room temperature control.
The New Ideal Temperatures by Room
Living Room & Dining Room
Ideal temperature: 20–22°C (68–72°F)
These are active spaces where people sit, talk, and move around. A slightly warmer temperature improves comfort without wasting energy.
Bedroom
Ideal temperature: 16–18°C (61–64°F)
Cooler temperatures help the body sleep better by supporting natural melatonin production and deeper rest.
Kitchen
Ideal temperature: 18–20°C (64–68°F)
Because cooking generates heat, a lower baseline temperature keeps the room comfortable and prevents overheating.
Bathroom
Ideal temperature: 22–24°C (72–75°F)
Bathrooms should be warmer to avoid discomfort after showers and reduce moisture-related issues.
Home Office
Ideal temperature: 20–21°C (68–70°F)
This range helps maintain focus and prevents fatigue during long work sessions.
Health and Energy Benefits of Proper Temperature Control
Adjusting temperatures by room can:
- Improve sleep quality
- Reduce heating bills
- Prevent dry skin and respiratory irritation
- Lower carbon emissions
- Increase overall comfort
Smart thermostats and programmable heating systems make these adjustments easier than ever.
The Bottom Line
The era of setting your thermostat to 19°C everywhere is over. Comfort, health, and efficiency depend on using the right temperature in the right room. By making small changes, you can create a home that feels better, costs less to heat, and supports your well-being year-round
