Cheapest Way to Dry Clothes Indoors in the UK: Airer vs Dehumidifier vs Tumble Dryer
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UK winters and washing lines don’t mix. So from October to March, the question in most homes is: what’s the cheapest way to get clothes dry inside without the house smelling damp or growing mould? I worked it out using the current energy price cap, not guesswork. The answer depends on how much washing you do.
The number everything depends on
From 1 October to 31 December 2026, the average capped electricity price is 26.32p per kWh for Direct Debit customers in England, Scotland and Wales (Ofgem). Your own rate depends on your region, tariff and how you pay, so look at your bill and swap in your figure.
The formula is simple:
Watts ÷ 1,000 × hours × your unit rate = cost
Every appliance has its wattage on the box or the label. That’s all you need.
Method 1: An ordinary airer (and patience)
Cost: nothing to run.
A plain airer in a warm room with a window cracked open is the cheapest method. The catch is that wet clothes release a lot of water into the air, and without ventilation that turns into condensation and, eventually, mould. More on beating that below.
Method 2: A heated clothes airer
These are plug-in airers with warm rails. Many are rated around 300W (BBC, Uswitch), but check yours.
At 26.32p/kWh, a 300W airer costs:
- About 7.9p an hour (0.3 kWh × 26.32p)
- About 32p for 4 hours, or 47p for 6 hours
Tip: a cover over the airer traps the heat and can cut drying time noticeably. Some models come with one.
Best for: small loads, and households without space for a dryer. Browse heated clothes airers on Amazon UK
Method 3: A dehumidifier
A dehumidifier pulls water out of the air, so clothes on a normal airer dry faster and your room stays drier. Many have a dedicated laundry mode. Which? has tested this approach and rates it among the cheapest effective options (Which?).
Wattage varies a lot between models, so use the formula. As a worked example, a 200W unit running for 6 hours uses 1.2 kWh, about 32p at the capped rate.
Best for: homes already fighting condensation or damp, since it does two jobs at once. Shut the door of the room you’re drying in so it works on that space only. Browse dehumidifiers with a laundry mode on Amazon UK
For a closer look at how dehumidifier types differ, see our guide to dehumidifiers and heated airers and what they cost per hour.
Method 4: A tumble dryer
The BBC’s figures for a typical cycle (BBC):
- Heat-pump dryer: about 1.8–2.1 kWh, so roughly 47–55p a cycle at 26.32p.
- Condenser or vented dryer: about 4.5–5.3 kWh, so roughly £1.18–£1.39 a cycle.
A heat-pump dryer is far cheaper to run than an older one, but more expensive to buy. If you’re a big family doing a full load every day, it can be the sensible choice: one cycle handles a load that would need hours on an airer.
At a glance
| Method | Rough running cost per load* | Good for |
|---|---|---|
| Plain airer + ventilation | £0 | Patience, small loads |
| Heated airer (300W, 4–6h) | 32p–47p | Small loads, no space for a dryer |
| Dehumidifier (200W example, 6h) | ~32p | Damp homes, faster airer drying |
| Heat-pump tumble dryer | ~47p–55p | Big, frequent loads |
| Condenser/vented tumble dryer | ~£1.18–£1.39 | Speed, at a price |
*Worked out at Ofgem’s 26.32p/kWh average, Oct–Dec 2026. Your rate and appliance will differ.
Free tricks that beat any gadget
Add an extra spin
Your washing machine’s spin is the cheapest drying you’ll ever do. A higher spin speed, or an extra spin cycle, leaves less water in the clothes to remove later.
Space it out
Don’t pile clothes on top of each other. Air needs to get round each item. Hangers on a door frame or shower rail add a lot of extra space. A multi-tier airer or over-door hanger gets more on in less floor space.
Ventilate, even in winter
Crack a window or run an extractor fan in the room where clothes are drying. It sounds backwards in the cold, but a slightly cooler, ventilated room is better than a warm one dripping with condensation. Damp and mould are linked to breathing problems such as coughs, wheezing and asthma (NHS inform, GOV.UK health guidance), so it’s worth taking seriously.
Don’t drape clothes on radiators
It feels efficient, but it blocks heat from reaching the room, makes your boiler work harder and dumps moisture straight into the air.
Dry in one room, door shut
Keep the moisture in one place, ideally with a dehumidifier or open window, rather than letting it spread through the house.
Which should you buy?
- Tight budget, small household: a good plain airer, plus the free tricks above.
- Small loads, cold flat: a heated airer with a cover.
- Condensation or mould problems: a dehumidifier. It’s the one appliance that fixes the cause.
- Big family, daily washes: a heat-pump tumble dryer, if you can afford the upfront cost.
Told straight
No single gadget wins for everyone. For most people, the cheapest setup is a decent airer, a high spin and a bit of ventilation, with a dehumidifier if the house gets damp. Work out your own costs with the formula and your real unit rate, and you’ll never wonder again.
Running costs calculated from Ofgem’s average price cap for 1 October to 31 December 2026 (26.32p/kWh). The cap changes every three months; update with the latest rate.
