Compressor vs Desiccant Dehumidifiers
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.
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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 | Heated rooms and everyday use in a flat |
| EcoAir DD1 Classic MK6 (Desiccant) | Cold, unheated or winter spaces |
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.
Prices and availability on Amazon are accurate as of the date of publication and are subject to change.
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.
