Buying Guide
Best Dehumidifier for a Room UK 2026 — Buyers Guide
Updated June 2026
You don't need a whole-house dehumidifier to fix one damp room. In fact, a smaller, cheaper model often works better because it's designed for the space. But choosing the wrong size wastes money — too small and it can't keep up, too big and you've overpaid. This guide matches the right dehumidifier to your room size, with specific recommendations for bedrooms, living rooms and bathrooms.
Quick answer
Our top pick: MeacoDry Arete One 6L (best bedroom pick)
£160–£200 on Amazon
Small bedroom (10–12m²): MeacoDry Arete One 6L (£160–200). Large bedroom (15–20m²): Devola 12L (£85–110). Living room (20–30m²): MeacoDry Arete Two 12L (£170–200). Bathroom (5–8m²): UniBond AERO 360 (£8–12). Large open plan (30–50m²): Dreo 20L (£180–230).
Check Price on Amazon →What size dehumidifier for my room?
Rule of thumb:
- Under 15m²: 6–10L/day dehumidifier
- 15–25m²: 10–12L/day
- 25–40m²: 16–20L/day
- 40m²+: 20–30L/day
Measure your room: length × width = m². A typical UK bedroom is 12m². A typical living room is 20–25m².
| Room Type | Typical Size | Recommended | Price |
|---|---|---|---|
| Small bedroom | 10–12m² | MeacoDry Arete One 6L | £160–200 |
| Large bedroom | 15–20m² | Devola 12L | £85–110 |
| Living room | 20–30m² | MeacoDry Arete Two 12L | £170–200 |
| Bathroom | 5–8m² | Mini dehumidifier or extractor fan | £30–60 |
| Large open plan | 30–50m² | Dreo 20L | £180–230 |
Best dehumidifier by room
MeacoDry Arete One 6L
Quietest option at 32dB. Built-in HEPA filter. Perfect bedroom size.
Pros
- 32dB ultra-quiet (bedroom-friendly)
- Built-in HEPA filter
- Perfect for 10–12m² bedrooms
- Laundry mode
Cons
- Premium price
- 6L capacity limits larger rooms
Who it's for: Small to medium bedrooms where night-time noise matters
Check Price on Amazon UK →Devola 12L
Budget alternative. Covers larger bedrooms.
Pros
- Half the price of premium models
- Covers larger bedrooms up to 20m²
- Built-in humidistat
Cons
- Louder than MeacoDry (~42dB)
- Basic build quality
Who it's for: Budget alternative covering larger bedrooms
Check Price on Amazon UK →MeacoDry Arete Two 12L
Best all-rounder. HEPA + WiFi + 38dB quiet.
Pros
- Best all-rounder
- HEPA filter + WiFi app
- 38dB quiet
- Covers 20–30m²
Cons
- Premium price
Who it's for: Living rooms that need quiet, smart, all-day operation
Check Price on Amazon UK →Dreo 20L Smart
GHI Approved. For larger living rooms.
Pros
- GHI Approved
- 20L/day extraction
- App control
- Handles 30–50m² open plan
Cons
- Bigger footprint
- Louder at full speed
Who it's for: Large living rooms and open plan spaces
Check Price on Amazon UK →UniBond AERO 360
No electricity. Silent. Leave on the windowsill.
Pros
- No electricity needed
- Silent
- Tiny — fits on windowsill
- Refillable tabs
Cons
- Limited capacity
- Tabs need replacing every 2–3 months
Who it's for: Small bathrooms with no extractor fan
Check Price on Amazon UK →NETTA 500ml Mini
Compact electric option for small bathrooms.
Pros
- Compact electric option
- Quiet thermoelectric operation
- Auto shut-off when full
Cons
- Small 500ml tank
- Slow extraction vs compressor models
Who it's for: Small bathrooms where you want an electric option
Check Price on Amazon UK →Bedroom pick? See our full bedroom guide → Living room or flat? Full review → Bathroom ventilation? Bathroom ventilation guide →
Dehumidifier for one room vs whole house
For one room, close the door and run the dehumidifier in that room only. This is more efficient and cheaper than trying to dehumidify your whole house. A 12L model in a closed bedroom drops humidity from 75% to 50% in 3–4 hours.
The same model in an open-plan space would take all day — and the humidity from adjoining rooms would constantly refill the dehumidified air. Always close doors, always target one space at a time.
Running cost per room
| Room/Model | Running cost/hour | Daily (6hrs) | Monthly |
|---|---|---|---|
| Bedroom (6L) | 4p | 24p | £7 |
| Living room (12L) | 5p | 30p | £9 |
| Large room (20L) | 9p | 54p | £16 |
Buying advice
Match capacity to room size, not house size
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