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Dehumidifier running cost calculator UK

Estimate a session and a month of electricity using your own tariff and runtime.

By Dehumidifier UK · Updated 6 October 2026 · Sources linked below

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Our answer

Electricity cost is power in kilowatts × time in hours × your price per kWh. Use measured session energy when available: a dehumidifier’s maximum or rated watts can differ from its actual use. The calculator estimates electricity only, excluding purchase cost and other appliances.

Your running-cost estimate

Enter your appliance and electricity details

Example: 1.242 kWh and £0.33 per session; £9.81 for 30 sessions.

207 W × 6 hours at 26.32p/kWh, continuously active.

The default 26.32p/kWh is Ofgem’s GB Direct Debit standard-variable average for 1 October–31 December 2026. It is a dated example, not your tariff or a fixed appliance price. Check your bill and edit it.

Choose a sensible power figure

Meaco publishes 136 W for the Arete Two 12L and 207 W for the 20L at 20°C/60% RH. The DD8L Pro’s medium setting is 437 W at those conditions. These are model-and-condition examples. A maximum rating, an adaptor’s output or an unexplained “kWh” claim is not the same kind of operating measurement.

Six-hour examples, continuously active

Example at 20°C/60% RHPowerElectricity in 6 hoursAt 26.32p/kWh
Arete Two 12L136 W0.816 kWh21.5p
Arete Two 20L207 W1.242 kWh32.7p
DD8L Pro, medium437 W2.622 kWh69.0p

What the active-share input means

At 100%, the estimate assumes the entered watts for the entire session. A lower percentage is an approximation for cycling; it treats the remaining time as zero consumption. Real machines may use fan, sampling or standby power during that remainder. For a useful actual result, measure the complete session with a suitable mains energy meter.

Monthly cost is a schedule, not a prediction

The default is 30 sessions per month. Changing the number does not make the calculator predict drying speed or seasonal humidity. Laundry loads, room temperature, ventilation, target RH and heating can change actual runtime. Add separate heating or fan energy if comparing complete drying arrangements.

Compare a completed outcome

A six-hour estimate is not automatically the cost of a dry load. Use the heat-pump dryer comparison to see how programme kWh and an appliance-running scenario differ. For choosing a machine, start with the laundry shortlist.

Sources and evidence

  1. Meaco Arete Two 12L specifications and extraction table
  2. Meaco Arete Two 20L specifications and extraction table
  3. Meaco DD8L Pro specifications and mode-specific extraction
  4. Ofgem October–December 2026 electricity example

Sources checked 6 October 2026. Manufacturer specifications are claims under their stated conditions; they are not our household measurements.