British Gas engineer Peter Knowles has shared a simple, low-cost method to help UK households stay cool during a heatwave: hanging a damp sheet in front of an open window. The tip comes as the Met Office predicts temperatures could climb as high as 40°C in some regions.
Most UK properties are not designed for hot conditions, often trapping heat rather than allowing it to dissipate. Knowles suggests several strategies for those who find a fan running at maximum speed inadequate.
How the Damp Sheet Method Works
Knowles explained: "Hanging a damp sheet in front of an open window during evening hours will help to cool incoming air naturally." The process involves soaking a clean cotton or lightweight sheet in cold water, wringing it out until damp but not dripping, then positioning it across an open window frame. For best results, place a fan blowing air through the sheet and into the room. The sheet may need to be re-dampened every few hours as moisture evaporates.
For south and west-facing windows that catch afternoon sun, Knowles also recommends reflective window film to reduce heat and glare.
Additional Cooling Tips from British Gas
British Gas has shared several other practical tips for keeping homes cooler during summer months:
- Switch to cooler lighting: Traditional 60-watt incandescent bulbs release around 50 watts of heat into a room, while an LED with the same brightness emits just 1–2 watts.
- Unplug heat-generating devices: Chargers, laptops and other plugged-in devices release ambient heat even when not in use. Unplugging them can help reduce stuffiness.
- Save batch cooking and washing for cooler times: Using ovens, hobs, tumble dryers and washing machines during the coolest parts of the day prevents adding extra heat when temperatures peak.
- Keep windows closed during the day: This prevents warm air from entering. Light-coloured curtains or blinds in heavier fabrics can also block heat effectively.
- Position fans thoughtfully: Place them at floor level to circulate cooler air. In the evening, point a fan out of the window to push hot air out.
Knowles said: "We all know how frustrating it is when our homes are hot and stuffy. The good news is that there are some practical steps that households can take to help keep indoor temperatures down during the summer months. Things like doing your washing in the evening, keeping windows closed during the middle of the day or putting your fans on the floor are all small changes that can make a real difference."
