Best dehumidifiers for garages, sheds and cellars

In its favour

• The listing states extraction at cold temperatures as low as 1 °C.
• Auto restart after a power cut and overdry protection are both listed.
• A continuous drainage hose comes in the box, and it weighs only 6 kg.

Good to know

• 7.5 litres a day is modest for a large, very damp cellar.
• Tank size is not clearly stated in the listing.

In its favour

• The humidity sensor turns it off at your setting and on again when humidity rises.
• Automatic restart is listed, so it resumes after a power cut.
• Desiccant extraction down to 1 °C suits cold bedrooms with streaming windows.

Good to know

• 10 litres a day is less than the compressor models in a warm house.
• The 1 m hose is short, so it must sit near a drain point.

In its favour

• The title states it is ideal for unheated rooms below 10 °C.
• Self-restart means it resumes after a power cut without a visit to reset it.
• Two fan speeds, a timer and laundry drying are listed.

Good to know

• The listing does not mention a drainage hose or outlet.
• 660 W is a high rating for a machine that may run for months.

In its favour

• The lift pump discharges water over obstacles up to 5 m high, useful in a cellar.
• Up to 30 litres a day, far more than the desiccant units for a very damp space.
• An anti-freeze function is listed, along with wheels for moving it.

Good to know

• No minimum working temperature is given, unlike the desiccant models.
• At 19 kg it is heavy to carry down cellar steps.

In its favour

• Auto restart and over-drying protection are both listed features.
• A continuous drainage hose is included for unattended running.
• The 3D louvre can spot airflow on one area, such as a cold window.

Good to know

• 8 litres a day at 20 °C suits a room rather than a whole damp house.
• On high it draws up to 623 W and reaches 49 dBA, per the listing.

In its favour

• The laundry function runs on full power continuously until you change it, per the listing.
• Desiccant extraction down to 1 °C suits a cold utility room or garage.
• A 1 m drainage hose is supplied for long sessions.

Good to know

• On full power it draws up to 570 W and reaches 46 dBA.
• No timer is listed, so laundry mode must be switched off by hand.

In its favour

• The listing gives an ambient working range of 1 to 40 °C.
• It stops at your set humidity and starts again when humidity rises.
• A continuous drainage hose is included, and the tank shuts it down when full.

Good to know

• Auto restart after a power cut is not mentioned in the listing.
• The filter needs cleaning every 2 weeks, which is easy to forget in a shed.