Dry Home Advice Static reference table
Dehumidifier running cost table UK
Use this quick table to sanity-check running costs before buying. Figures use an example electricity price of 25p/kWh. Your tariff, humidity setting and how often the unit cycles on/off will change the real cost.
Quick takeaway
A bigger unit is not always more expensive in real use
Higher wattage costs more per hour, but a better-sized unit may remove moisture faster and cycle off sooner. Compare wattage, room size and daily run time together.
How to interpret the table
- Bedrooms: often run at lower wattage and shorter daily periods once humidity is under control.
- Laundry: can need longer sessions, so daily hours matter as much as wattage.
- Cold rooms: desiccant models may draw more power but can work better when compressor models struggle.
- Severe damp: running cost is not the only factor — leaks or structural damp need fixing first.
Next step before buying
If the table looks affordable, check whether your room needs a small, medium or larger-capacity model. If it looks expensive, focus on fixing moisture sources and using a hygrometer to avoid unnecessary run time.