Compressor vs desiccant dehumidifier: which for a cold house?
Sources awaiting check
Dehumidifier size and running-cost calculator
Worked example
For a heated bedroom and a made-up 200 W dehumidifier run for 8 hours a day on a 25p/kWh tariff:
- Suggested type: compressor (the room is heated).
- Energy: 200 W × 8 h = 1.6 kWh a day.
- Cost: £0.40 a day, £2.80 a week, £72.80 over the October to March season (182 days).
Source: Manufacturer documentation, awaiting check
Editor: brief §7 #11. Spec-based comparison. Any power or extraction figure is manufacturer-stated and dated. Every claim sourced; no health claims (link NHS); no "we tested"; note four-nation differences where they apply.
How each type works
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Heated rooms
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Cold rooms
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Running cost and noise
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FAQs
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Related guides
- What size dehumidifier do I need?How to size a dehumidifier for a room or home: extraction rate vs tank size, the manufacturer's size bands, and when to pick desiccant for a cold room.
- Damp in the loft, garage or conservatoryWhy lofts, garages and conservatories get damp, how to check for leaks and ventilation problems, and when a desiccant dehumidifier suits.
Sources
- Desiccant dehumidifiers keep working in cold rooms, where compressor models extract less (Manufacturer documentation), awaiting check
- Manufacturer sizing guide: extraction capacity by home size (Manufacturer documentation), awaiting check
- NHS guidance on damp and mould and your health (NHS), awaiting check