Neither 20°C nor 22°C, experts reveal this temperature saves money without freezing

January 10, 2026

/ last update 07:50

As energy costs soar and the climate changes, homeowners are reassessing their indoor comfort strategies. For decades, the norm dictated a thermostat setting of 19°C, a relic from the energy crises of the 1970s. Yet, experts now suggest that this guideline is outdated, with new research revealing that a more tailored approach can enhance thermal comfort while also leading to significant energy savings. This shift encourages a reconsideration of what constitutes an optimal temperature for various living spaces, moving away from a one-size-fits-all mentality.

Factors like the urban heat island effect and the evolution of modern housing have created a necessity for differentiated heating strategies. Recent studies indicate that zones within the home require different temperatures based on usage: living areas can comfortably maintain 20°C to 22°C, while bedrooms thrive at slightly cooler settings of 16°C to 18°C for restful sleep. Implementing a zonal heating approach not only ramps up comfort levels but allows for meticulous temperature control, ensuring energy isn’t wasted on unoccupied spaces. Together, these insights form a roadmap toward sustainable living and improved cost efficiency in the long-running battle against rising energy bills.

The Outdated 19°C Rule: Why It No Longer Applies

The 19°C benchmark was established during a time of economic necessity, serving as a pragmatic response to energy shortages. However, the world has changed dramatically since then. Today, advancements in building standards mean modern homes trap heat more effectively than those built decades ago. As a result, clinging to the rigid 19°C guideline could lead to unnecessary discomfort or energy waste.

A significant factor in re-evaluating heating standards is the impact of climate change. With winters becoming milder yet more unpredictable, the experience of cold varies considerably. A sudden drop in temperature can make a home heated to 19°C feel far colder than it once would have. Adapting to these changes calls for a more dynamic and individualised approach to home heating.

Understanding Zonal Heating

Zonal heating involves setting different temperatures for various rooms based on their primary uses. Living spaces frequently occupied by family and guests are best heated to a comfortable 20°C to 22°C, while bedrooms can remain cooler, around 16°C to 18°C, promoting better sleep. This targeted approach reduces the wasteful heating of unused areas, optimising energy consumption across the home.

In kitchens or hallways, where activity levels are heightened, an ambient temperature of 18°C to 19°C suits both comfort and efficiency. Implementing these tailored settings encourages warmer spaces where they are most needed while maintaining overall energy efficiency in the home.

Practical Money-Saving Tips for Home Heating

Adjusting thermostat settings based on room usage is just one strategy for minimising energy bills. The old adage about reducing thermostat settings by one degree holds—approximately 10% energy savings—but combining this with a zonal heating approach multiplies potential savings.

Average homes could see considerable financial relief by lowering bedroom temperatures overnight and adjusting temperatures in less-used rooms. For instance, reducing the temperature in a seldom-used guest room from 19°C to 16°C could generate annual savings ranging from £80 to £120, while optimising living room temperatures can further cut costs. Over an entire year, these small adjustments can lead to significant aggregate savings.

The Importance of Effective Insulation

No energy savings strategy can be effective without adequate insulation. Improved insulation keeps heat within the living space, minimising energy consumption. Key areas to focus on include:

  • Loft insulation: Filling loft space to the recommended depth can shield against heat loss and is one of the most cost-effective measures homeowners can take.
  • Cavity wall insulation: This can significantly reduce heating demands in modern homes.
  • Draught-proofing: Sealing gaps around windows and doors prevents cold air from infiltrating, maintaining warmth throughout.

Harnessing Smart Technologies for Better Control

The advent of smart technology in home heating facilitates finer temperature control. Smart thermostats learn household routines and adjust heating when spaces are occupied or unoccupied, ensuring both comfort and efficiency. These tools are invaluable for implementing a zonal heating strategy, offering homeowners direct management of their indoor climates.

Thermostatic radiator valves (TRVs) allow for custom temperature settings in individual rooms, making the transition to an intelligent heating system seamless and efficient. This level of control empowers families to optimise their heating based on their unique needs, paving the way for sustainable living.