As summer temperatures rise to increasingly frequent extremes, households are seeking effective and economical ways to stay cool indoors. Experts recommend starting with simple measures such as closing windows and curtains during the day to block out heat, while opening windows at night or early morning to allow cooler air to circulate. Staying in shaded rooms and avoiding the use of ovens can also help reduce indoor temperatures.

For those looking for affordable cooling options, fans are widely regarded as the most cost-effective solution. According to guidance from the Energy Saving Trust, fans typically cost around £20 and consume very little electricity, costing between 15p and 31p to operate over a full 24-hour period. Their low energy consumption also translates to minimal carbon dioxide emissions, making them a more environmentally friendly choice compared to conventional air conditioning units.

While fans do not reduce the actual room temperature, they enhance comfort by promoting airflow, which accelerates evaporation of sweat and thereby cools the body. The cooling effect is further improved by wetting the skin, which simulates natural sweat evaporation. For work environments, a small USB fan positioned on a desk can offer a low-cost way to maintain comfort at a computer.

The Energy Saving Trust notes that more expensive fans, such as tower, desktop, or pedestal models, are not necessarily more energy-efficient or cost-effective than basic options. However, there is a critical limitation to consider: when indoor temperatures exceed 35°C, fans lose effectiveness and may even exacerbate discomfort by circulating hot air.

Below this threshold, fans remain a highly efficient cooling method, consuming about 20 times less electricity than portable air conditioning units and up to 50 times less than fixed air conditioning systems. In contrast, air conditioners present a higher financial burden to operate and have a more significant environmental impact due to greater energy use.

For those willing to invest in a more advanced system, air-to-air heat pumps offer both cooling in summer and heating in winter. The government has introduced a £2,500 subsidy to offset the installation cost of these units, which typically run around £4,500. This support covers more than half of the average expense, making heat pumps a viable option for year-round temperature regulation amid shifting climate patterns.

With temperatures consistently rising, these recommendations provide a range of practical and sustainable options for indoor cooling tailored to different budgets and needs.