Condensation hits bedrooms hardest — we each breathe out half a litre of moisture a night into a cold, closed room. The fix needs to be small enough for a corner and quiet enough to sleep beside. We ranked these five on noise first, then extraction and footprint, because a dehumidifier you switch off at bedtime is a dehumidifier that doesn't work.
Price and availability accurate as of publishing; subject to change.
Buying guide: how to choose
Compressor vs desiccant
Compressor models are cheaper to run and ideal for typical Irish indoor temps (15–25°C). Desiccant models work better in cold spaces — garages, unheated rooms under 15°C — but use roughly double the electricity. Most homes want a compressor unit.
Size by litres per day
The headline number (10L, 12L, 20L) is extraction per day under test conditions. Rule of thumb: 10–12L for apartments and bedrooms, 20L for a 3-bed house with drying laundry, 25L+ for big or very damp homes.
Running costs at Irish rates
A modern 12L compressor unit draws ~160 W: about 5–6 cents per hour. Run 8 hours daily and you spend roughly €12–15 a month — usually less than the heating energy wasted evaporating damp air, which is why a dehumidifier can lower total bills.
Laundry mode is the killer feature
If you dry clothes indoors (most of Ireland, most of the year), laundry mode pays for the machine: a good unit dries a load overnight for ~6 cents of electricity versus ~€1.50+ per tumble-dryer cycle, and without the condensation hitting your walls.
Frequently asked questions
Are dehumidifiers noisy?
Compressor models run 38–48 dB — quiet fan to gentle hum. For bedrooms pick a unit with a night mode under 40 dB, or run it daytime only; a few hours daily is enough for most rooms once humidity is under control.
Where should I place a dehumidifier?
Centrally, doors open, for whole-floor drying — or in the problem room with the door shut for targeted work. Keep 20 cm clearance around intakes. For laundry, small closed room beats hallway every time.
What size dehumidifier do I need for an Irish home?
Apartments and single rooms: 10–12L/day. Standard 3-bed semi: 20L. Large, old or very damp houses: 25L+. Oversizing slightly is fine — bigger units hit target humidity faster and then idle, which is actually more efficient.
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