As summers become hotter, air conditioner sales are booming. If you’re looking to invest, here’s what to consider

When a heatwave struck the UK this week, Jon Connorton, a software developer, began monitoring temperatures inside his east Hampshire terrace house. With some rooms reaching close to 40C, it was time to deploy the air conditioner. “We just wheel it out in emergencies,” he said. “We were having trouble sleeping.”

Connorton and his wife have a portable air conditioner. These plug-in devices cool interior air by removing heat from it and blowing that heat outside, typically via a large hose slung from a window or door.

Whether you want to improve your home’s security or simply know who’s at the door, the latest generation of smart doorbells will help put your mind at ease

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Doorbells have evolved. Today, they watch us as we approach, let the people inside the home know we’re coming sooner than our finger can hit the button, and give them a good look at our faces before they open the door. They’re essentially security cameras with a chime function.

If you haven’t already installed one of these handy tools, there’s a huge array available. Choosing the best video doorbell can be a bewildering task, with various factors to consider, including how much of your doorstep you want to see and whether you’re prepared to pay for a subscription. To help make the decision a little bit easier, I tested eight popular video doorbells to find the best.

Best video doorbell overall:
Google Nest Doorbell (battery)

Best budget video doorbell:
Blink smart video doorbell with Sync Module 2