Dehumidifier electricity cost in United Kingdom
Damp weather, laundry drying, room temperature, and target humidity all affect how long a dehumidifier’s compressor or desiccant heater runs.
Use your current electricity unit rate and model Economy 7 or time-of-use operation only for the hours billed at that price.
Confidence A 99/100. Effective 2026-07-01 to 2026-09-30.
Check official source ↗Worked calculation
A United Kingdom starting scenario
0.450 kW is multiplied by scheduled time and the 60% active-runtime assumption. The inputs are examples, not claims about every device. Replace each one with the label, meter reading, schedule, and tariff that apply to you.
Cost = compressor kW × scheduled hours × duty cycle × tariff450 W · 10 hours/day · 7 days/week · 60% active
- Monthly energy
- 81.9 kWh
- Monthly cost
- £21.38
- Annual cost
- £256.61
Transparent method
The local calculation
Cost = compressor kW × scheduled hours × duty cycle × tariffThe device model stays global. The currency, tariff scope, validity period, and billing cautions come from the United Kingdom data layer.
Read the methodology →Before trusting the result
Three checks for United Kingdom
Distinguish compressor and desiccant models.
Reduce duty cycle after the room reaches its target humidity.
Measure multi-day use when laundry or weather causes large swings.
Turn estimates into evidence
Measured this device in United Kingdom?
The calculator accepts anonymous smart-plug, meter, charger, or utility readings after the result. A real measurement improves the country-device cohort without exposing your name or exact address.
Calculation standards
Visible inputs. Reproducible results.
WhoPowerCost Lab's research desk maintains the formulas, market notes, and worked examples.
HowEnergy, tariff, and behavioural assumptions stay separate so readers can replace one input without hiding the others.
WhyThe page exists to answer an operating-cost decision. Advertising never changes a formula, default, or recommendation.