Dehumidifier vs Tumble Dryer: Which Is Cheaper to Run?

If you’re deciding between a dehumidifier or tumble dryer, the real question is simple:

Which one actually costs less to run?

Drying clothes outside during a UK winter isn’t realistic. I used to rotate washing between the shower rail, spare room and radiators like some kind of laundry Tetris champion. It worked — until it didn’t.

The tumble dryer solved the space problem instantly.

But then came the electricity bill.

So I ran the numbers properly and compared dehumidifier vs tumble dryer cost using the latest electricity rates (around 25p per kWh).

Here’s what the maths says.

In most cases, a dehumidifier is cheaper.

Quick Comparison: Dehumidifier vs Tumble Dryer

If speed is your priority, the tumble dryer wins.

If cost and damp prevention matter more, the dehumidifier usually comes out ahead.

Scroll down for my calculator to work out your costs.

Is It Cheaper to Dry Clothes With a Dehumidifier?

Yes — in most UK households it is cheaper to dry clothes with a dehumidifier instead of a condenser or vented tumble dryer.

Even though a dehumidifier runs for longer, it uses far less power.

Let’s look at real numbers using 25p per kWh.

Cost of Running a Tumble Dryer

Heat Pump Dryer (Most Efficient)

Modern family-sized heat pump dryers typically draw around 800W–1000W during peak operation.

800W × 3 hours = 2.4 kWh
Cost per load: 60p

1000W × 3 hours = 3 kWh
Cost per load: 75p

These are far more efficient than older dryers — and much closer to dehumidifier costs.

Condenser Dryer

2500W × 2 hours = 5 kWh
Cost per load: £1.25

Vented Dryer

3000W × 2 hours = 6 kWh
Cost per load: £1.50

If you’re running a £1.25 dryer cycle four times per week, that’s:

£5 per week
£260 per year

That’s where the real difference starts to show.

Cost of Running a Dehumidifier (For Drying Clothes)

Assuming 6 hours of use:

280W × 6 hours = 1.68 kWh
Cost per use: 42p

440W × 6 hours = 2.64 kWh
Cost per use: 66p

650W × 6 hours = 3.9 kWh
Cost per use: 98p

Even a larger dehumidifier often costs less than a standard condenser or vented dryer.

If you switch from a £1.25 tumble dryer cycle to a 42p dehumidifier session and run four loads per week, you could save roughly:

£160–£200 per year

More if your dryer is older or higher wattage.

👉 Find out more about the cost of using a dehumidifier.

Annual Savings Calculator

Heat Pump Tumble Dryer vs Dehumidifier

This is where the comparison gets tighter.

A modern 800W heat pump tumble dryer costs around 60p per load.

A 280W dehumidifier costs around 42p for a six-hour drying session.

That’s not a huge gap.

If you already own a heat pump model, the savings from switching to a dehumidifier are smaller.

If you’re running a condenser or vented dryer, the dehumidifier is significantly cheaper.

Does a Dehumidifier Dry Clothes Properly?

Yes — if you use it correctly.

Best setup:

• Small room
• Door closed
• Clothes spaced out
• Dehumidifier placed centrally

In my experience, clothes are usually dry overnight.

The added bonus? It actively removes moisture from the air, which reduces condensation and mould risk.

That’s something a tumble dryer doesn’t do — and poorly vented dryers can actually contribute to damp problems.

Heated Airer or Dehumidifier?

A heated clothes airer is another alternative.

A typical 200W airer running for 8 hours:

0.2 kW × 8 hours = 1.6 kWh
Cost: 40p

That’s cheap.

But heated airers don’t remove moisture from the air.

The “gold standard” winter setup in many UK homes is:

Heated airer + dehumidifier

The airer gently warms the clothes.
The dehumidifier pulls the moisture out of the room.

It’s efficient, cheap, and helps protect your home from damp.

So, Dehumidifier or Tumble Dryer?

If you want speed and convenience, choose a tumble dryer.

If you want lower running costs and protection against damp, a dehumidifier usually wins.

In the dehumidifier vs tumble dryer debate:

• Heat pump dryer = close call
• Condenser or vented dryer = dehumidifier is cheaper

For most households without a modern heat pump machine, the dehumidifier comes out ahead on cost.

Tips for getting the most out of your tumble dryer

If you decide using your tumble dryer is still worthwhile, here are a few tricks to reduce the running costs.

If you're washing multiple loads each day, then make sure that you load the tumble dryer immediately after one cycle has finished. This way, it will retain heat and use less energy.

Before loading the tumble dryer, use the spin cycle on your washing machine to get rid of excess water.

If your dryer has a low heat setting, use it. The drying will take longer but will use far less electricity.

Tumble dryer balls are a cheap gadget that will help separate your clothes once in the machine. This should help them to dry faster and will reduce the running time of your tumble dryer.

FAQ

If you want to save even more money, why not take a look at some other energy-saving devices?

FAQs