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Goodbye to the 66°F rule: this is the temperature you should have at home to save money and stay warm in winter

With the cold sometimes making home life uncomfortable, many people are asking what the ideal temperature is, and experts have some tips to share.

Woman reading at home

For years, energy experts have suggested that 66°F (19°C) is the ideal temperature for homes, but this recommendation comes with some nuances. The guideline originated during the 1970s oil crisis, primarily as a measure to reduce national energy consumption. However, at that time, homes were far less insulated than they are today, both in terms of thermal efficiency and heating needs.

Nowadays, while houses are better insulated, the expectations of their occupants have evolved. According to Nick Barber, an energy management expert, and Brad Roberson, a heating systems specialist, “19°C (66°F) is a theoretical temperature, but it doesn’t always provide the desired comfort.” For these professionals, 20°C (68°F) strikes the perfect balance between comfort and energy efficiency.

Finding the comfy temperature.
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Finding the comfy temperature.

Why is 68°F the ideal temperature?

Experts highlight several reasons why 68°F (20°C) is considered the optimal home temperature:

  • Energy balance: Every degree above 66°F (19°C) increases energy consumption by approximately 7%. However, maintaining 68°F (20°C) is still considered reasonable in terms of energy use.
  • Enhanced comfort: While some people still feel a chill at 66°F (19°C), the additional degree often eliminates this discomfort, creating a more pleasant living environment.
  • Simplified management: With modern smart thermostats, maintaining 68°F (20°C) is easy and allows for scheduling based on time of day and which rooms need heating.

The health risks of lowering temperatures too much

Reducing the temperature below 66°F (19°C) to save on energy costs can have negative effects on health, particularly for vulnerable individuals:

  • Respiratory illnesses: Cold air can weaken the respiratory system, increasing the risk of infections.
  • Difficulty sleeping: A bedroom that is too cold can disrupt sleep patterns, leading to fatigue.
  • Cardiovascular impact: Cold conditions force the body to work harder to stay warm, which can be problematic for those with heart conditions.

Striking the right home temperature balance

The long-standing 66°F (19°C) rule is no longer a one-size-fits-all solution, and 68°F (20°C) offers a better equilibrium between comfort and energy savings. That doesn’t mean 66°F (19°C) is a bad choice; rather, it depends on personal preferences and lifestyle.

With a few simple adjustments – such as using a smart thermostat, ensuring proper insulation, and optimizing heat distribution – it’s possible to stay warm and comfortable throughout the winter without overspending.

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