The Great Air Conditioner Swindle.

The Great Air Conditioner Swindle.

July 13, 2026 · 12 min

About this episode

This episode investigates the effectiveness of portable air conditioners and the misleading marketing surrounding them.

The Great Air Conditioner Swindle asks a simple question: are those cheap "portable air conditioners" all over social media actually air conditioners at all? During every British heatwave the adverts arrive with remarkable punctuality. Tiny desktop gadgets promise to cool an entire bedroom, lounge or office for the price of a takeaway. The videos look convincing. The claims sound scientific. The reality is often rather less impressive. In this episode of Mark & Pete , we investigate the difference between genuine portable air conditioners, evaporative air coolers and ordinary fans, and explain why the laws of thermodynamics remain stubbornly unimpressed by clever marketing. We look at misleading online adverts, impossible cooling claims, energy use, humidity, why proper air conditioning always needs somewhere to dump the heat, and how physics quietly ruins many sales pitches. Along the way we share plenty of facts, statistics and practical advice to help you avoid wasting money during the next hot spell. What actually keeps a room cool? Do ice packs really work? Why do ceiling fans make you feel cooler without lowering the room temperature? And why are so many…

People in this episode

Hosts: Mark, Pete

Topics covered

Keywords

Mentioned in this episode

Products: portable air conditioners, evaporative air coolers, ordinary fans

Books & works: Proverbs

Places: Britain

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