A Heating Expert Reveals Why 68°F Is No Longer the Ideal Winter Temperature

January 15, 2026

As winter embraces the UK, and chilly winds knock at our doors, it’s time to talk about a topic that’s been heating up—literally—amongst homeowners: the ideal indoor temperature. For years, many of us have adhered to the age-old guideline of keeping our thermostats set at 66°F (19°C). However, recent insights suggest that this number is, quite frankly, outdated. Let’s dive into why 68°F (20°C) might just be the *sweet spot* for your comfort, energy efficiency, and home health this winter.

Highlights

  • 🔍 Outdated Norms: The 66°F rule has origins in the energy crisis of the 1970s, but modern homes require a fresh take.
  • 🏠 Home Health: Keeping temperatures at or above 68°F helps prevent mold and damp issues, safeguarding your property.
  • 💡 Energy Efficiency: A higher thermostat setting can actually promote energy savings by improving HVAC performance.
  • 🤧 Health Matters: Warmer indoor temperatures support better respiratory health and general well-being.

Did you know? Homes maintained at temperatures below 64°F can significantly increase the risk of respiratory illnesses, especially during winter! ❄️

From 66°F to 68°F: What’s Changed?

When I first heard about raising the thermostat to a toasty 68°F, I’ll admit I was skeptical. I mean, why fix what isn’t broken, right? However, after diving deeper into the research and chatting with heating experts, a different picture emerged.

The 66°F guideline was birthed during a time when homes were far less insulated. In contrast, our modern *abodes* are built with top-notch materials that allow for better temperature retention. With this in mind, experts are now advocating for a more realistic target: 68°F (20°C) during the winter months.

Interestingly, Josh Mitchell, a seasoned HVAC technician and the brains behind Air Conditioner Lab, explains that maintaining the indoor air temperature around 66°F often leads surfaces like walls and ceilings to plummet below 60°F (16°C). That’s exactly the kind of cold environment that promotes *condensation* and mold growth—definitely not what you want in your home!

The Comfort Factor

Let’s not forget about comfort; it’s a crucial part of our home experience. Many find that an additional degree makes all the difference. At 66°F, subtle drafts can invade your cozy spaces, leaving you reaching for that extra blanket or pulling out the electric heater just to stay warm. By setting your thermostat to 68°F, you eliminate those chills, creating a home environment that feels inviting and snug.

But it goes beyond just feeling warm. According to an energy management expert, maintaining your home at 68°F enhances your body’s ability to fend off illnesses. Cold air can inhibit the natural filters in your respiratory system, making us more susceptible to viruses and bacteria.

The Hidden Costs of Low Heating

Now, let’s talk finances. Yes, keeping your thermostat lower can save you a few quid on energy bills, but what about the long-term costs? Josh pointed out that many homeowners end up spending more on repairs related to mold than they saved on heating. Imagine replacing entire drywalls or cleaning ductwork because of mold spores that spread throughout your home—yikes!

To put this into perspective:

  • 💰 Lower Heating Costs: Every degree you lower your thermostat can save you 3-5% on your energy bill.
  • 😷 Mold Mitigation: Keeping surfaces above 60°F can drastically reduce mold risk, saving you costly repairs.
  • ⚒️ HVAC Performance: A well-maintained system running at optimal temperatures lasts longer and functions efficiently!

Energy Efficiency: A Win-Win

It might sound counterintuitive, but setting your thermostat higher can, in fact, enhance energy efficiency. Higher temperatures help to maintain steady air circulation within your HVAC system, reducing the wear and tear often caused by short cycling—where the system shuts down before adequately heating your home.

This means a well-functioning system not only keeps you comfy but also minimizes unnecessary stress and energy usage—*a win-win* situation for both your wallet and the environment, especially with the looming challenges of climate change.

Final Thoughts: Take Control

As we navigate through this cold season, it’s essential to reevaluate our heating habits. If you’re still clinging to the outdated notion that 66°F is the ideal setting, it might be time for a thermostat upgrade! Aiming for 68°F balances comfort, health, and energy efficiency beautifully.

Don’t hesitate to invest in a smart thermostat to help manage your home temperature effortlessly. By doing so, you’re not just keeping warm; you’re also contributing positively to your home’s integrity and your overall well-being. Embrace the warmth and let’s toast to a healthier, cozier winter! 🥂