Sliced Bread

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Sliced Bread Presents: Air Purifiers

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Air Purifiers

BBC Radio 4 - Sliced Bread, Air Purifiers

Air purifiers claim to get rid of pollutants and particulates from the air around us. But how effective are they at doing that?

Air purifiers have become one of the most popular home gadgets in recent years and you can spend hundreds of pounds on the top-end models. They promise to remove harmful pollutants in the air, reduce the symptoms of allergies and help you breathe more easily in a more healthy environment. But what's the evidence around how effective they are? 

Listener Laura, a respiratory doctor, got in touch wanting to know whether they work and even if they could help some of her patients in their daily lives. 

Greg Foot investigates the science behind the product, speaking to experts to find out just how many pollutants are being pulled from thin air, the effective range of air purifiers and whether there are any downsides to how they work.

This series, we’re testing your suggested wonder-products. If you’ve seen an ad, trend or fad and wonder if there's any evidence to back up a claim drop us an email to sliced.bread@bbc.co.uk or you can send us a voice note to our new WhatsApp number: 07543 306807


PRESENTER: Greg Foot
PRODUCERS: Kate Holdsworth and Julian Paszkiewicz

Sliced Bread Presents

Intelligent speech, the most insightful journalism, the wittiest comedy, the most fascinating features and the most compelling drama and readings anywhere in UK radio.

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Factual: Health & Wellbeing

Factual: Science & Nature

Factual: Science & Nature: Science & Technology

While Sliced Bread takes a break, we serve up... Toast.

While Sliced Bread takes a break, we serve up... Toast. Sean Farrington examines the spectacular failures of wonder products and businesses which had promised so much.

While Sliced Bread takes a break we serve up... Toast. A study of the spectacular failures of brands which had promised so much to consumers.    

In each episode, the presenter and BBC business journalist, Sean Farrington, examines one big idea. What did it promise? Why did people back it? Why did they get burnt?  

Some of the world's most successful businesses have also brought us some of the world's most remarkable failures. So, what led them to be toast? And what can we learn from their stories today? 

Sean unpicks all the early optimism, hype and ambition. He learns about the tremendous success of a brand before hearing how it faltered, with help from expert commentators and people who were directly involved. How do they view things now and what, if anything, could have been done differently? 

The self-made millionaire and serial entrepreneur, Sam White, is alongside him, analysing the missteps that changed a brand's fortunes and reaching her own, often instructive, conclusions.  

From big tech to high street retail and, of course, food, Toast tackles the business ideas that, one way or another, ended up cooked. 

Sliced Bread returns for a new batch of investigations in February. In the new series, Greg Foot will investigate more of the latest so-called wonder products to find out whether they really are the best thing since sliced bread. In the meantime, Toast is available in the Sliced Bread feed on BBC Sounds.

Toast is a BBC Audio North production for BBC Radio 4.

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