For decades, households across the UK have followed a widely accepted guideline for keeping their homes warm during cold weather: maintain a consistent indoor temperature of 19°C. This number appeared in everything from energy-saving brochures to government recommendations—and for a long time, it served as the golden standard of energy-efficient comfort. But that’s no longer the case.
As our understanding of energy usage, climate realities, and evolving economic pressures grows, experts are no longer unified on that single magic number. In 2024, a new recommendation is emerging—one that’s causing many to reassess how they heat their homes. Whether you’re a homeowner trying to cut heating bills or someone concerned about the planet, this isn’t just a change in degrees—it’s a shift in mindset.
Let’s take a closer look at why 19°C may no longer be the benchmark, what temperature experts now consider optimal, and what it all means for you, your family, and your finances.
Quick look at the updated heating temperature advisor
| Category | Details |
|---|---|
| Previous Standard | 19°C (room temperature baseline) |
| New Recommended Temperature | 18°C (general public), 20–21°C (vulnerable groups) |
| Primary Reason for Change | Energy efficiency and updated health advice |
| Most Affected Groups | Elderly, people with medical conditions, low-income households |
| Expert Consensus | Customise heating to personal needs rather than a universal number |
What changed this year
The decades-old “19°C rule” was originally developed based on energy models that balanced comfort with affordability. However, ongoing climate shifts, increasing energy costs, and updated health data have revealed that what worked 10 years ago may no longer be ideal today. Current consensus now adjusts that baseline depending on a household’s make-up and needs.
In 2024, energy and public health experts have adjusted guidelines to recommend a lower baseline of **18°C** for the average adult in good health. However, for certain vulnerable groups—such as the elderly, infants, and people with chronic illness—a higher threshold of **20–21°C** is now advised. The reasoning is based on thermal risk tolerance and age-related body regulation differences.
“Blanket recommendations don’t serve us anymore. We have enough data now to recommend more personalised guidelines without compromising safety.”
— Dr. Elaine Dobson, Environmental Health Researcher
Why the temperature recommendation was changed
One of the primary reasons behind the shift is the growing need for energy savings amidst rising household costs. Heating is one of the biggest contributors to home energy bills. Reducing the recommended baseline even by 1°C can result in as much as a 7–10% reduction in bills through the year.
Yet it’s not all about money. The new recommendations also stem from better understanding of human thermal comfort, differentiated by age and health condition. What’s comfortable and safe for a young, active adult may not be so for an elderly person who is more vulnerable to hypothermia at lower room temperatures.
Moreover, energy experts have made it clear that no one-size-fits-all number should dictate how you heat your space. The best approach is to adapt heating levels room by room and consider night-and-day regimes that match your specific lifestyle.
Who qualifies and why it matters
While 18°C serves as the new broad guidance, several groups have recommended warming their spaces further:
- Elderly residents: Over 65s are advised to heat living spaces to at least **20°C**, with particular attention to bedrooms at night.
- Households with infants: Young children require more warmth; daytime living spots should stay above **21°C** when possible.
- Those with medical conditions: Conditions like arthritis, poor circulation, and respiratory issues all require warmer, consistent environments.
On the other hand, younger adults in good health may find 18°C totally sufficient, particularly when dressed appropriately and with some physical movement.
“Think of 18°C as a bottom line, not a universal goal. Vulnerable people shouldn’t feel guilty or risky about needing more heat.”
— Peter Vaughn, Senior Consultant, National Energy Review Board
How to apply the new recommendations in your own home
Making temperature changes doesn’t need to be complicated—or expensive. You can begin by using smart thermostats that allow you to set different temperatures in different rooms. If that’s not an option, consider these practical tips:
- Lower thermostats in hallways or unused rooms (aim for 16–17°C)
- Use draught-excluders to preserve warmth in living spaces
- Schedule heating for peak hours: early morning and evening
- Invest in layered clothing and thermal socks rather than raising the temp globally
- Close blinds or curtains in the evening to insulate glass surfaces
The switch to an 18°C standard means efficiency doesn’t stop at tech—it starts with your habits.
Winners and losers in the heating rule update
| Winners | Losers |
|---|---|
| Young adults in good health who can save on energy bills | Vulnerable households who require more heating to stay safe |
| Environment advocates aiming for lower carbon footprints | Rental tenants with outdated heating systems |
| Landlords using energy efficiency to improve EPC scores | Those in poorly insulated homes facing higher base costs |
The environmental factor not to be ignored
Alongside financial and health motivators, environmental impacts have pushed this rule change into the spotlight. Lowering average indoor temperatures by 1°C across a nation could equate to millions of tonnes of reduced emissions annually. This plays a direct role in climate strategy, helping meet net-zero targets without banning gas boilers overnight or overhauling infrastructure today.
But experts argue that **every small behavioural change counts**. The 18°C push is seen as a gentle yet impactful policy that empowers individuals to contribute without massive sacrifice.
Future energy trends and what to watch for
Looking ahead, smart home systems are expected to play a much larger role in temperature management. AI-powered thermostats, app-linked radiator controls, and energy feedback tools allow for incredibly granular temperature control without over-usage. These systems will enable families to meet the new standard while catering to specific needs—whether that’s a chilly grandparent or a child studying from home in a bedroom-turned-classroom.
There’s also momentum behind city-level temperature audits and retrofit programmes, particularly in housing association blocks and older properties. Plans are underway to introduce seasonal heating subsidies for high-need groups, which could balance the rollout of these recommendations more equitably.
“Smarter heating should empower users, not tie them to arbitrary numbers. The future is flexibility with intelligence.”
— Marian Patel, Director of Future Homes Alliance
Frequently asked questions (FAQs)
What is the new recommended indoor temperature for 2024?
The current guidance suggests 18°C for general households, and 20–21°C for vulnerable individuals such as the elderly or medically sensitive.
Why was the 19°C rule dropped?
The 19°C rule was dropped in favour of more tailored heating based on health conditions, energy costs, and environmental impact.
Is 18°C safe for children and older people?
No, for children and the elderly, experts recommend keeping living spaces at 20–21°C to ensure health and comfort.
Will lowering my thermostat to 18°C really save me money?
Yes. Lowering your heating by 1°C can reduce your annual heating bill by up to 10% depending on your household and insulation level.
How do I keep warm without increasing my heating?
Layer clothing, use thermal socks, insulate windows, and use draught excluders. Heat only the rooms you regularly use.
Can I change my heating temperature throughout the day?
Absolutely. Use programmable thermostats to schedule warmth during morning and evening hours and lower nighttime temps safely.
Are there government supports to help with winter heating?
Yes. Various winter fuel payments and home insulation grants are available depending on income, age, and health factors.
Will the recommended temperature keep changing?
Possibly. As technology, climate policy, and health research evolve, temperature guidelines may continue to be adjusted.