EcoAir
EcoAir DD1 Simple MK3
Short answer: we’d put the DD1 in a cold utility, porch or unheated room, where a 12 L compressor would be mostly a fan. Its 7.5 L figure is measured at 20 °C / 60 % RH, not the 30 °C / 80 % RH point compressor brands use, and it runs from 1 °C.
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Compressor dehumidifiers in this guide quote 10, 12 or 20 litres at a warm, wet laboratory point, then extract much less below about 10 °C. The EcoAir DD1 Simple MK3 is a desiccant: a heated rotor that adsorbs moisture. EcoAir rates it at 7.5 litres per day at 20 °C and 60 % RH. That cooler test point is why 7.5 L here isn’t a smaller machine than a 12 L compressor in any simple sense. Operating range is 1–35 °C. The 1 °C floor is why it belongs in a cold room.
The body is slim and light in a way compressors aren’t. Dimensions are 290 × 475 × 175 mm. Weight is 6 kg. The tank holds 2 litres and has a cover and a handle. Airflow is listed at 126 m³/h. Noise is 34 dB(A) on low and 47 dB(A) on high. Controls are a rotary humidistat with economy and turbo/laundry positions. There’s a 3D louvre you aim by hand, plus auto shut-off, auto-restart and anti-tilt. You can fit a continuous drain hose. Warranty is three years.
The electricity is the other half of the desiccant choice. EcoAir quotes 300 W on low / economy and 580 W on high. An Arete One 12 L is 151 W at 20 °C / 60 % RH. You’d run a DD1 because the room is cold, not because it’s cheaper per hour. High / laundry mode is for a short, wet job. Daily background drying is what economy mode is for, which EcoAir itself flags in the manual as the setting for ordinary use.
In a heated flat this is usually the wrong spend. You’d be paying desiccant watts for a job a quieter compressor can do. In a utility that sits at 5 °C, a porch, a stone-floored pantry or a holiday home that’s only warmed at weekends, the DD1 is the machine whose published range still includes the room. The larger EcoAir DD3 Classic MK3 is the same logic at 11 L for a larger cold volume. Brand guidance on that model reaches about 90 m², with a digital display and a 4.2 L tank, if the cold space is a whole house rather than one room.
Published specification
Extraction figures and room sizes are what the maker claims, and they’re often measured at a warm, humid lab point. Your rooms in the UK are usually cooler, so that’s a lower real take. We haven’t run our own lab tests.
- Type
- Desiccant
- Claimed extraction
- 7.5 L at 20 °C / 60 % RH (manufacturer claim at 20 °C / 60 % RH)
- Room guidance
- Up to ~60 m²; works from ~1 °C
- Tank
- 2 litres
- Published noise
- 34 / 47 dB(A) (EcoAir, low / high)
- Operating temperature
- 1–35 °C
- Power (manufacturer)
- 300 W low / economy, 580 W high / turbo (EcoAir)
- Weight
- 6 kg
- Continuous drain
- Continuous drain hose can be fitted
- Laundry mode
- Yes (turbo / laundry on the rotary control)
- Filter
- Silver nano filter (brand)
- Warranty
- 3 years
Best suited to
- You, if it’s an unheated utility, garage-adjacent room, holiday home or north-facing space that sits near 1–10 °C.
- You, if you want a 6 kg, 175 mm-deep body you can carry between cold rooms.
Not the right pick when
- The house is heated and you want night-mode noise in the mid-30s all the time. High mode is 47 dB(A) and 580 W.
- You need a precise digital humidistat. The DD1 Simple is a rotary control.
Specification strengths
- 7.5 L/day is published at 20 °C / 60 % RH, which is a more honest indoor point than 30 °C / 80 % RH.
- It works from 1 °C, so the published range still includes your cold utility.
- It’s 6 kg and 290 × 475 × 175 mm, slim enough to carry between cold rooms.
- The 2 L tank has a carry handle.
- You get economy and turbo/laundry modes, a 3D louvre, continuous drain, auto-restart, anti-tilt and a three-year warranty.
Weak points on paper
- 300–580 W is several times an Arete One 12 L at 151 W, so running cost is the desiccant tax.
- High mode is 47 dB(A).
- There’s no digital humidity readout on the Simple MK3.
For heated homes, see our best 5 dehumidifiers for UK homes.
Common questions
Why pick a desiccant like the DD1 for a cold room?
A desiccant doesn’t rely on a cold coil, so it keeps working when the room’s cold. EcoAir rates the DD1 from 1 °C, where a compressor rated from 5 °C struggles.
Can the DD1 dry laundry?
Yes, the rotary control has a turbo / laundry setting. On high it draws 580 W and EcoAir lists 47 dB(A), so we’d use it in a utility rather than next to your bed.
How much power does the DD1 use?
EcoAir lists 300 W on low / economy and 580 W on high / turbo. That’s more than a compressor in a heated room, which is why we’d keep the DD1 for cold spaces.