How to keep your house cool in a heatwave

·4-min read

Parts of the UK will see plenty of heat and sunshine in the coming days, with temperatures expected to reach nearly 30C in England and Wales.

Annie Shuttleworth, a Met Office forecaster said: “We are expecting temperatures to rise at the beginning of the new week.

“Sunday will be a cloudy and wetter day for much of Scotland and Northern Ireland while those further south will see bright and sunny conditions with temperatures in the mid-twenties.

“Despite a cloudy start to Monday, conditions will be clear and bright with hot temperatures for large parts of England and eastern Wales as the result of continental air moving in from the south.

“This air will start to push through the country on Tuesday and Wednesday, dragging temperatures as high as 29C for parts of the south-east while Scotland and Northern Ireland will also move into the mid-twenties.

“It’s going to be very warm for the time of year and could even be rather uncomfortable for people trying to sleep at night, with temperatures remaining at around 18C during the evening.”

As the heatwave approaches, it’s important to know how to keep your home cool, especially if you do not have air-conditioning.

From closing your windows during the day to building your own DIY AC, here is what you can do to lower the temperature in your home.

Keep your curtains closed

While it may be tempting to open your curtains or blinds and let the sunshine in when it’s hot outside, doing so can actually increase the temperature of your home.

Instead, experts suggest keeping them closed throughout the day, adding that extra care should be taken with metal blinds and dark curtains, as these can absorb heat.

“Keeping your blinds closed during the day will reflect a surprising amount of heat radiating in through windows, especially during the time of day when the sun’s rays shine directly on your home,” appliance store Lowes states.

Only open your windows at night

According to OVO Energy, windows should be kept closed during the day, but once the heat starts to drop they can be opened again.

This is because temperatures fall considerably at night, meaning that opening a window in the evening will allow cool air to circulate around the house.

“Tempting as it is to fling open the windows at the first sign of heat, it’s a plan liable to backfire on you,” the company says.

“If it all gets a bit too hot during the day and you really must open a window, make sure you do so in a way that encourages a through draught. This means opening windows at opposite sides of the house and keeping doors open so the air can move through freely.”

Build your own DIY air-conditoner

While an electric fan may be one solution that can keep you cool in place of AC, there is another option you can use to make it even cooler.

Simply place a bowl filled with ice water directly in front of a fan and then switch it on. As the ice melts the breeze from the fan will pick up the cool air coming from the ice’s surface and create a cool breeze, similar to an air-conditioning unit.

If you don’t have any ice, leaving bowls of water around the house to create moisture will also help.

Turn off the tech

A surprising amount of heat is generated from appliances around the house, so avoiding charging them overnight or switching devices off can help avoid internal heat gains.

According to Dr Nerina Ramlakhan, a sleep expert at Silentnight, the optimal bedroom temperature for sleeping is between 60F and 69F (16C and 21C), and your brain needs to be slightly cooler than the rest of your body.

For this reason, she suggests turning off all electrical devices in the bedroom as these emit heat and switching off sockets too. This includes not having your phone on charge.

“A good night’s sleep is important in order to process information throughout the day as well as to repair and re-balance the body physically and mentally,” Dr Ramlakhan previously told The Independent.

Lights out

Like technology, light bulbs radiate heat, which won’t help when you’re trying to keep cool in this weather.

OVO Energy adds that conventional incandescent light bulbs generate light quite inefficiently, giving off up to 90 per cent of their energy as waste heat in the process.

As such, switching to low-energy light bulbs will help reduce overheating, as well as saving money.

Buy house plants

Indoor plants can also help cool down a home, as they can help bring moisture into a stuffy room.

“Planting trees and vegetation and the creation of green spaces to enhance evaporation and shading are other options, as temperatures in and around green spaces can be several degrees lower than their surroundings," the NHS says.

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