What does Martin Lewis say about dehumidifiers?

Martin Lewis, the bloke who founded MoneySavingExpert.com, has gone deep on dehumidifiers. And I mean deep. With energy prices going bonkers and everyone waking up to condensation on their windows, he's been asked about these boxes a lot. His take? They're not some miracle gadget that'll fix everything. But if you're smart about it? Yeah, they can actually make sense. Especially when you look at the numbers. The key thing he hammers home is that you've got to use them right, otherwise you're just burning through cash for no reason.

Does Martin Lewis recommend buying a dehumidifier?

Honestly? It depends. He's not saying everyone needs to rush out and grab one. But if your house has that gross condensation on the windows, or mould starting to creep into corners? Then yeah, maybe. The logic is pretty simple — running a dehumidifier costs way less than cranking up the heating just to fight dampness. But here's the catch: the savings only show up if you pick the right model and use it properly. He keeps saying, check the wattage. Ideally under 200W. And don't just let it run 24/7 in every room. Target the problem areas, that's the trick.

What type of dehumidifier does Martin Lewis recommend?

So here's where it gets specific. Martin's big on compressor dehumidifiers — the ones that work like a fridge. Most UK homes, they're the way to go. They just use less juice in normal British weather (above 10-15°C or so). Desiccant ones? They'll work in colder spots, sure, but they eat electricity. He also bangs on about getting one with a humidistat built in. That little feature means the machine turns off automatically when the air's dry enough. Saves power. Saves money. Simple.

How much does it cost to run a dehumidifier according to Martin Lewis?

He's actually done the maths on this. Based on current price caps, a typical 200W compressor model running for about 8 hours a day? That's maybe 40 to 60 pence. Compare that to a 2kW heater doing the same shift — that's like two or three quid. Big difference. And here's something I hadn't thought about — drier air actually feels warmer. So you might not need the heating on as high. But he warns, don't get carried away. Run it around the clock and those pennies add up fast. Targeted use is where it's at.

Cost comparison table (based on Martin Lewis's typical calculations)

When does Martin Lewis say you should use a dehumidifier?

Use it where you see the problem. That's the short version. If there's condensation on the glass or damp patches on the wall? That's your cue. He reckons running it while you're home and can keep an eye on things — evening time, maybe overnight in the bedroom. After cooking or showering? Definitely. Drying clothes indoors? That's a big moisture bomb, so yeah, bring it in. But here's the thing he's careful to say: a dehumidifier isn't a replacement for opening a window or using an extractor fan. You still need ventilation.

Martin Lewis's checklist for buying a dehumidifier

• Check the wattage: Under 200W is the sweet spot. Keeps running costs low.
• Choose compressor type: For most of us in the UK, these are the efficient ones.
• Look for a humidistat: Auto shut-off means you're not wasting electricity.
• Size matters: A smaller unit for one room costs less to run than some monster whole-house machine.
• Compare running costs: Do the math with your electricity tariff before you buy. Seriously.

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