What I would actually buy to survive a UK heatwave when nobody owns AC

Glasgow hit 23°C yesterday and Scottish news pages led with photos of families half-melted on Inverclyde’s beaches. By UK standards, this is a heatwave. By preparation standards, it is a national crisis.

Less than 5% of UK homes have air conditioning according to the most recent UK Green Building Council figures, and the housing stock was designed to hold warmth in, not release it. So when the Met Office warns of a few 20-something days in a row, the plan most households fall back on is “open a window and hope.” That worked in 1998. It does not work now. Here’s the kit I’d actually spend money on, in the order I’d buy it, after three Scottish summers of trying every cheap trick first. A decent tower fan is the starting point and everything else is an upgrade on top.

Who actually needs to prepare

If you live in a top-floor flat with single-glazed windows facing south or west, you’re the priority case. Same if you have anyone over 70 in the house, anyone on cardiovascular medication, or a baby under one. UK heatwave excess deaths skew heavily toward older people in poorly ventilated upper-floor flats, and the cheap interventions (fan, blackout curtain, ice water in a bowl) genuinely move the needle.

Who can skip most of this: people in well-insulated new-builds with cross-ventilation on the ground floor. You’ll be uncomfortable for two days. You won’t be in danger. A desk fan and some patience will get you there.

What matters when choosing a fan

The British market floods with cheap fans the second the temperature crosses 22°C and most of them are junk. Three things actually matter.

Airflow at low noise. Cheap fans hit 60dB at full speed, which is loud enough to keep you awake. A decent bladeless fan runs at 45dB and you can sleep through it. Worth the extra £40 if you need it overnight.

Oscillation range. A fan stuck pointing at one corner of the room cools one corner of the room. You want at least 90-degree sweep. Most boxes lie about this. Look for actual customer videos before paying.

Timer and remote. Underrated. Falling asleep with a fan on your face for eight hours gives you a stiff neck and a dry throat. A two-hour timer is the difference between sleeping through and waking up at 3am to crawl across the room. A solid oscillating tower fan with both features sits in the £60-90 range and lasts five summers.

What I’d actually buy

I’d start with a mid-range tower fan, because nothing else has the cost-to-comfort ratio. The Dreo, MeacoFan, and Honeywell QuietSet lines all do the job. I’ve owned a Meaco air circulator for three years and the bearings are still quiet. The Dreo Pilot Pro got the best reviews in the 2025 Which? test if you want to follow the magazine pick.

Then I’d add a pack of blackout curtains. The single biggest temperature drop I have ever measured in a flat was switching from cream linen curtains to heavy blackout panels on a south-facing window. The room came down by almost 4°C over a sunny afternoon. They’re ugly. They work.

Third buy: a cooling pillow or a buckwheat-filled one that doesn’t hold heat the way memory foam does. Memory foam pillows in a 25°C bedroom are genuinely awful. A bamboo-covered cooling pillow runs around £30 and the difference at 3am is unreasonable.

Fourth: an insulated water bottle you keep next to the bed, filled at 9pm with ice. By the time you wake up at 4am parched, it’s still cold. Trivial item, huge quality of life.

The mid-tier upgrade if you have an extra £300

This is where a portable air conditioner enters the conversation, and where I want you to be careful. Single-hose portable ACs are the bestsellers, and they are the worst design. The hose vents hot air out the window, but the negative pressure inside the room pulls warm air back in through every gap in the building, which means the unit fights itself.

If you go portable, get a dual-hose unit. They’re bigger, heavier, uglier, twice the price, and roughly twice as effective. The De’Longhi Pinguino dual-hose line gets mentioned every year for good reason. A dual hose portable air conditioner in the £500-700 bracket will actually cool a bedroom. The £250 single-hose box won’t do much beyond shifting hot air around.

A cheaper alternative I’ve had real success with: a evaporative air cooler running on a tray of ice. In a dry heat (which the UK is starting to get more of) it can drop a small room by 3-5°C. In humid heat, useless. Know your climate.

Common mistakes

Closing all the windows during the day “to keep the heat out” is the right move only if your flat is meaningfully cooler than outside. If it’s already 26°C inside and 23°C outside, you’ve trapped yourself in a sauna. Use a digital indoor thermometer (about £12) and follow the temperatures, not the folk wisdom.

Buying USB-powered desk fans expecting them to cool a room. They cool your face from 30cm away. That’s the entire job. Useful for the office desk, not for a bedroom.

Putting ice in front of a fan and expecting it to act like AC. It marginally helps, briefly, in a small room. It is not a substitute for any of the above.

Ignoring overnight cooling. A common mistake is to run the fan all day and turn it off at bedtime “to save electricity.” The bedroom is the room where temperature actually affects you most. Fan electricity costs are tiny — an energy usage monitor will confirm a tower fan costs around 1-2p an hour. Run it.

The one piece nobody tells you about

Bedsheets matter more than people give them credit for. Polyester-blend sheets in a heatwave are essentially clingfilm. A pair of proper linen bed sheets or 100% cotton percale changes the whole experience. They’re £80-150 for a double, and yes, that feels like a lot, but you sleep in them 365 nights a year and the difference in a heatwave is the largest single comfort upgrade I’ve made.

If you want broader context on cooling a small space, our piece on small-space climate control covers the same physics from the opposite direction. And our car kit guide includes a hot-weather addendum worth a read before a long drive in this stuff.

The 23°C Scotland is squirming under right now will look gentle by August. Spend the £150 on the fan and the curtains this week. The portable AC decision can wait until you know whether you actually need it.