Compressor vs Desiccant Dehumidifiers UK
When you shop for a dehumidifier you will meet two main types: compressor and desiccant. They both pull moisture from the air, but they work in different ways and suit different situations — and picking the right type for your flat makes a real difference to performance and running cost.
This guide explains how each works, the pros and cons for a UK flat, and which to choose, with a strong pick of each type.
QUICK ANSWER
Choose a compressor dehumidifier for heated rooms — it is cheaper to run at normal temperatures. Choose a desiccant for cold or unheated spaces, where it keeps working when a compressor struggles. For most UK flats used in heated rooms, a compressor is the default.
Editorial note: BetterFlat is an independent UK home advice website. We research products based on suitability for flats, practical features, value for money and publicly available product information — we have not tested every product hands-on. Some links are affiliate links: if you buy through them we may earn a commission at no extra cost to you. As an Amazon Associate we earn from qualifying purchases. See our affiliate disclosure and how we review products.
Our top pick: MeacoDry Arete One 12L — best for heated rooms and everyday use in a flat
Who this guide is for
Anyone deciding which type of dehumidifier to buy for a flat, especially if some rooms are cold or unheated.
Our picks at a glance
| Pick | Best for |
|---|---|
| MeacoDry Arete One 12L See details ↓ |
Heated rooms and everyday use in a flat |
| EcoAir DD1 Classic MK6 (Desiccant) See details ↓ |
Cold, unheated or winter spaces |
How we chose
We compared the two technologies on the measures that matter in a UK flat — performance at low room temperatures, energy use, noise, weight and warm-air output — rather than on headline extraction figures alone. We describe published specifications and manufacturer information rather than quoting prices or star ratings, which change — check the current figures on Amazon before buying.
Our picks in detail
BEST COMPRESSOR — MeacoDry Arete One 12L
Best for: Heated rooms and everyday use in a flat
A compressor cools a surface to condense moisture from the air. Efficient and cheap to run at room temperature, which makes it the default for most flats. This model adds a humidistat and quiet night mode.
Pros: Cheap to run when warm, strong extraction, holds set humidity.
Cons: Less effective below about 15°C; can hum.
BEST DESICCANT — EcoAir DD1 Classic MK6 (Desiccant)
Best for: Cold, unheated or winter spaces
A desiccant uses a moisture-absorbing material and works well even in cold rooms, so it suits unheated spare rooms, garages and winter use. Light and quiet, and it gently warms the air.
Pros: Works in the cold, lightweight, quiet, adds warmth.
Cons: Uses more electricity than a compressor in a warm room.
Details)
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.co.uk at the time of purchase will apply to the purchase of this product.Prices and availability on Amazon are accurate as of the date of publication and are subject to change.
| Room temperature | Compressor | Desiccant |
|---|---|---|
| Above 15°C — heated living room or bedroom | Recommended. Most efficient here, and at its best from 16°C upwards | Works well, but draws more power for the same job |
| 10–15°C — cool bedroom, hallway, spare room | Only a large 20–25L model really keeps up | Recommended. Performance does not fall away |
| Below 10°C — garage, loft, unheated conservatory | Not effective | Recommended. Unaffected by the cold |
| Power draw | 150–260W | Around 330W at 20°C and 60% humidity |
| Warmth added to the room | Discharge air about 2°C warmer | Discharge air about 10–12°C warmer, which can be welcome in winter |
If the room you want to dry is one you actually heat, a compressor model will cost less to run. If it is a cold room, a compressor will struggle however large it is.
Temperature thresholds, power draw and discharge temperatures: Meaco technical guidance.
How to choose
- Temperature: compressors are best above ~15°C; desiccants keep working in the cold.
- Running cost: compressors are cheaper to run in heated rooms; desiccants use more power.
- Noise: desiccants tend to be quieter; compressors can hum.
- Weight: desiccants are lighter and easier to carry room to room.
- Warmth: desiccants add a little heat, which can be a bonus in winter.
- Most flats: if your rooms are heated, a compressor is the sensible default.
Common questions
Which is cheaper to run, compressor or desiccant?
In a heated room a compressor is cheaper to run. A desiccant uses more electricity, but it is worth it in cold rooms where a compressor would barely work.
Which type is better for a cold flat?
A desiccant. It keeps extracting moisture at low temperatures, so it suits unheated spare rooms, hallways and winter conditions where compressors lose efficiency.
Which is quieter?
Desiccant models are generally quieter and have no compressor to hum, which can make them nicer in a bedroom — though many compressors now have a quiet night mode.
Do I need both?
Most flats only need one. Choose a compressor if your rooms are heated, or a desiccant if you are mainly tackling a cold, unheated space.
Our recommendation
For most UK flats used in heated rooms, a compressor like the MeacoDry Arete One 12L is the efficient default. If you are drying out a cold or unheated space, a desiccant such as the EcoAir DD1 is the better tool.
Related guides
- Condensation Risk Calculator — free tool
- Best Dehumidifiers for UK Flats
- Best Dehumidifiers for Mould
- Best Moisture Meters for Walls UK
- How to Prevent Mould in a Flat
- Damp & Mould hub
