Dehumidifier to dry clothes: what it really costs

What does a dehumidifier cost per load?

The table below assumes six hours at a constant average power and €0.30/kWh. These are arithmetic examples. They do not establish how long your laundry takes to dry. Replace both runtime and unit price with your own values.

These are neither guaranteed upper limits nor measurements. Compressor cycling, fan operation, temperature and the selected programme affect average power and runtime. Read total kWh over a complete run for a more useful comparison.

Is it cheaper than a tumble dryer?

Use your dryer’s whole-cycle kWh or its energy label. New EU dryer labels state kWh per 100 cycles: divide that figure by 100. The label programme is a reference, not a measurement of your chosen programme. Multiply kWh by the same unit price for both methods.

Match the laundry mass, spin speed and final dryness before deciding which costs less. Space, elapsed time and additional room heating can change the practical choice. A dehumidifier’s water tank also collects existing room moisture, so the water collected is not a direct measure of how dry the clothes are.

Where do I find my electricity rate?

On your own bill or in your supplier's app, as the unit rate per kWh. Together with actual kWh, it determines direct electricity cost, and it varies a lot by country and by tariff — a fixed contract, a standard variable one and a time-of-use tariff can be far apart. The €0.30 used above is a round number to make the arithmetic checkable, not a claim about what you pay. Substitute your own rate and the table still works, whatever your currency.

The humidity rule that matters more than the cost

Indoor drying adds moisture to room air. The Verbraucherzentrale guidance on heating and ventilation gives roughly 40–60% relative humidity as a general room range. Cooler walls can still be at risk even when the room reading looks acceptable.

• Measure room humidity and temperature; a single reading does not diagnose a building.
• Use a suitable room and appropriate ventilation. Follow the device instructions.
• Choose a spin speed compatible with the care labels to reduce the water left in the load.
• Investigate leaks, condensation and persistent damp separately from electricity cost.

Frequently asked questions

How much does it cost to dry clothes with a dehumidifier?
Multiply the energy for the whole run in kWh by your unit price. As a fictional example, 250 W average power for eight hours uses 2 kWh and costs EUR 0.70 at EUR 0.35/kWh. Rated watts and an assumed runtime are estimates, not a measured cost per dry load.

Is a dehumidifier cheaper than a tumble dryer?
Either can cost less. Compare the same amount of equally dry laundry using whole-run kWh and the same tariff. For a dryer label showing kWh per 100 cycles, divide by 100. The label programme may differ from your actual use; a meter reading is more specific to your run.

Does a dehumidifier replace a tumble dryer?
That depends on your space, acceptable drying time and laundry needs. A dehumidifier removes moisture from room air; that does not prove clothes have reached the same dryness as a dryer programme. This electricity comparison does not include room heating, ventilation heat or your time.

What humidity level should I stay under when drying laundry indoors?
Verbraucherzentrale gives roughly 40 to 60 per cent relative humidity as a general room range. Cold surfaces can still have condensation or mould risk at a lower room reading. Monitor temperature and humidity, ventilate appropriately, and investigate persistent damp; a room reading is not a building diagnosis.