I started closing internal doors in winter, my heating bill dropped noticeably

January 29, 2026

As winter envelops the UK, many homeowners find themselves grappling with rising heating bills. With the chill setting in, the question of how to optimise home heating becomes paramount. One often overlooked strategy is the management of internal doors. While it might seem intuitive to close doors to unused rooms in an effort to contain heat, doing so can paradoxically exacerbate heating costs. By keeping these doors open, homeowners may actually enhance thermal efficiency, promoting better air circulation, and ultimately leading to cost reduction in heating.

Why Keeping Internal Doors Open Can Save Money

Experts argue that allowing hot air to flow freely throughout the home is essential for maintaining a comfortable temperature. When internal doors are closed, it can create pockets of warm and cold air, forcing heating systems to work harder. This not only causes discomfort but also leads to spikes in energy consumption, directly affecting the heating bill. By leaving doors open, homeowners can ensure a consistent distribution of warmth, significantly improving energy savings and reducing overall heating costs.

The Science Behind Airflow and Heating Efficiency

Heating systems are designed to circulate warm air through the home. When doors are closed, the hot air generated by radiators or central heating systems becomes trapped, leading to uneven temperatures. This results in inefficient heating, as the system must compensate for these colder areas once doors are reopened. Keeping internal doors open facilitates a smoother airflow, allowing heat to permeate every corner of the home and ensuring that the heating system operates optimally.

When Is It Appropriate to Close Internal Doors?

While open doors may be the general recommendation for optimal heating, there are scenarios where closing them can be beneficial. For instance, during particularly cold nights, it may be wise to close doors to rooms that are not frequently used, thereby conserving heat during peak hours. However, this should be balanced with the need for airflow and energy efficiency during the day. Strategically closing doors can complement a more comprehensive approach to home insulation strategies.

Additional Tips for Effective Home Heating

Beyond managing internal doors, several practices can further improve heating efficiency. Consider investing in high-quality home insulation to prevent drafts, sealing any gaps around windows and doors. Regular maintenance of heating systems, such as servicing boilers or cleaning radiators, ensures they function correctly, contributing to lower heating bills. Implementing these strategies collectively can secure optimum thermal comfort while keeping costs in check.