HVAC experts reveal why you feel cold despite setting thermostat to 20°C

January 17, 2026

As winter settles in, many find themselves adjusting their thermostats to a comfortable 20°C, yet still shivering under layers of blankets. The dissonance between the displayed temperature and the actual sensation of cold can be bewildering and frustrating. Multiple factors contribute to this phenomenon, from inadequate insulation to airflow issues, all impacting how warmth is distributed throughout a home. Understanding these elements is crucial for achieving a cozy living space during the colder months.

Inadequate Insulation: The Silent Heat Thief

One of the primary reasons your home feels chilly even at a seemingly adequate setting is poor insulation. Walls, ceilings, and floors that haven’t been properly insulated allow heat to escape, making it difficult to retain warmth. Signs of inadequate insulation often include cold walls or drafts around windows and doors.

What You Can Do

Addressing insulation issues can involve several actionable strategies:

  • Seal Drafts: Check around windows and doors for gaps and use weatherstripping or caulking to seal them.
  • Upgrade Insulation: Enhancing attic insulation can significantly improve heat retention, as warm air naturally rises.
  • Thermal Curtains: Using thick, insulated curtains helps keep warm air in while blocking cold drafts.

Blocked Airflow: The Hidden Obstacle

Even a well-functioning heating system can falter if airflow is restricted. Blocked vents and obstructed registers prevent warm air from circulating evenly, leading to cold spots in your home.

Steps to Improve Airflow

Enhancing airflow requires regular maintenance and attention to detail:

  • Clear Vents: Ensure that furniture, rugs, or other objects aren’t blocking airflow from heating vents.
  • Change Filters: Regularly replace air filters to prevent clogging that impedes airflow.
  • Inspect Ducts: Have a professional check for leaks in ductwork that could allow heated air to escape.

Thermostat Issues: Accuracy Matters

The location and functionality of your thermostat can significantly impact your home’s comfort level. A thermostat placed near a heat source may read warmer than the actual temperature in the rest of the house.

Optimising Your Thermostat

Proper thermostat placement can enhance your home’s climate control:

  • Optimal Placement: Ensure your thermostat is away from heat sources to avoid inaccurate readings.
  • Consider Upgrades: Modern smart thermostats offer better accuracy and energy efficiency; consider making the switch.
  • Settings Check: Ensure the thermostat is set to “Auto” rather than “On” to prevent continuous cool air circulation.

Efficiency of Your HVAC System

As HVAC systems age, their efficiency may decline. An outdated or poorly maintained system may struggle to maintain the desired temperature, resulting in a persistent chill even with heating efforts.

Maintaining Your HVAC System

Regular maintenance is essential for optimal performance:

  • Annual Tune-Ups: Schedule regular inspections and maintenance to keep your system running efficiently.
  • Sizing Matters: Ensure your heating unit is properly sized for your home, as an undersized unit will struggle to heat effectively.
  • Consider Upgrading: If your system is more than 15-20 years old, it may be time for a more efficient replacement.

Humidity Levels: The Unsung Hero

The perception of warmth is also significantly influenced by humidity levels. Dry air, often produced by standard heating systems, can make a room feel cooler than it is.

Adjusting Humidity for Comfort

Maintaining appropriate humidity levels can drastically improve comfort:

  • Use a Humidifier: Incorporating a humidifier into your heating system can help retain heat by adding moisture to the air.
  • Seal Leaks: Check for air leaks around windows and doors to prevent dry air from seeping in.

Structural Considerations and Their Role

The architecture of your home also affects temperature distribution. High ceilings, large windows, or an open-plan layout can lead to uneven heat retention.

Solutions for Structural Challenges

  • Zoned Heating Systems: Consider installing a zoned heating system for individualized temperature control in different areas.
  • Space Heaters: While not a permanent solution, space heaters can provide additional warmth in particularly cold rooms.

Personal Factors Influencing Temperature Sensation

Individual physiology may also play a role in how cold or warm one feels at home. Factors such as age, gender, stress, and fatigue can heighten sensitivity to cold.

Enhancing Personal Comfort

Addressing personal variables can also contribute significantly to comfort:

  • Layer Your Clothing: Wearing multiple layers, ideally of insulating materials like wool, can help trap body heat.
  • Stay Hydrated: Proper hydration helps regulate body temperature, which can mitigate feelings of chill.

Creating a Cozy Atmosphere

Lastly, consider your home’s décor and ambiance. Simple changes such as adding rugs, thick curtains, and warm lighting can drastically alter your perception of warmth.

Design Choices for Warmth

Strategic decor can enhance warmth:

  • Rugs and Carpets: Soft flooring materials can keep rooms feeling warmer.
  • Warm Lighting: Use lighting that casts a warm glow, creating a more inviting atmosphere.

If feeling cold despite your efforts, it may be time to consult with an HVAC expert to diagnose and address underlying issues in your heating system. A proactive approach to comfort will ensure that even during the coldest months, your home remains a warm refuge.