Insulation experts are encouraging households to adopt the so-called 30cm rule
A simple rearrangement of furniture could help households stay warmer this winter without turning up the heating – and it won’t cost a thing. As Britain braces for freezing temperatures, experts warn that many homes are squandering heat and money simply by obstructing radiators with sofas, beds and bookcases.
Insulation specialists are encouraging households to adhere to the so-called 30cm rule – maintaining at least 30 centimetres of space from radiators to allow hot air to circulate effectively around rooms. Chad Bragg, chief technical officer at insulation company SuperFOIL, says poor furniture placement is one of the most common – and overlooked – sources of heat waste.
He said: “Many don’t realise how crucial proper airflow is to your radiators’ energy efficiency. Or how much additional energy radiators end up wasting when they’re being blocked by pieces of furniture positioned just a little too close. It’s reported that poor positioning can lead to a 25% loss in heating efficiency.
“That’s a massive amount of wasted heat, and it’s exactly why it’s essential to ensure your radiators have some breathing room before you switch on the heating.” However, creating space around radiators is just one of several easy steps households can take to reduce winter energy waste.
Over time, air can become trapped inside radiators, preventing hot water from circulating effectively. Mr Bragg explained: “Over time, radiators can trap pockets of air, which stops hot water from flowing properly and forces the heating system to spend more energy for the same results. Releasing the air once a year helps to keep everything running efficiently.
“It’s a simple task that only needs a radiator key and can easily be done at home. But, simple or not, doing this can help reduce running costs and keep the home’s heating in good condition.”
Cold air leaking through gaps around windows and doors can quickly negate the benefit of turning the heating on. Mr Bragg cautioned: “Draughts are a current of cold air that often slips through the gaps around windows and doors, and they can drastically reduce the temperature in a room.
“Look at sealing gaps affordably by adding self-adhesive foam tape to windows, and grabbing a few cheap draught excluders to keep cold air from slipping in through the gaps at the bottom of external doors.”
Heating homes only when needed is another key way to avoid waste. He said: “If you have a smart thermostat, set the timer so the heating comes on at certain times throughout the day, and take the time to find your preferred cut-off temperature so you don’t waste energy on heating your home past the point that you need it.
“Little measures like that can help you to avoid small, costly mistakes like forgetting to switch off the heating, while still making sure your home is warm when you need it to be.”
For homes with radiators on external walls, reflectors placed behind them can push heat back into the room rather than letting it escape through brickwork. Mr Bragg said: “Adding radiator reflectors helps redirect 95% of heat back into the room, minimising the energy you spend on heating your home.
“These reflectors keep warmth from being lost straight through your walls, reflecting it back toward your living space where it can have the most impact. Homeowners report that this small change can help to keep your home warmer and even allow you to lower the thermostat by as much as three degrees.”
Finally, he warned that hidden insulation problems can quietly drive up bills year after year. He said: “If you feel like your energy bills just keep climbing, then it’s essential to double-check your insulation to make sure it’s still effective.
“Insulation is one of the biggest factors that control how efficient your heating will be, and that means that issues with your insulation can be far more costly than many people realise. Some easy ways to spot issues with your insulation are to keep an eye out for things like cold spots or unexplained condensation in your home.
“Addressing these issues when they crop up is essential for homeowners who want to maintain a warmer, more comfortable home while still keeping their heating bills low.”
He added: “Winter is already a costly time of the year for British homes, and with the new energy price cap causing bills to rise, many households will be feeling an extra pinch.
“That’s why it’s essential to take whatever steps they can to keep their home heating energy-efficient, from keeping radiators clear and bled, to insulation upgrades for those homes that need them for many years to come. Many of these changes feel small, but a few small changes can make a big difference, both to your comfort and your wallet this winter.”