Solution · Residential Buildings

Dry rooms,
no mold

Excessive humidity in apartments and basements is more than just a musty smell – it attacks the building structure, furnishings, and health. For over 60 years, DÖLCO has been manufacturing robust dehumidifiers in Freiburg, allowing you to permanently bring your indoor climate into a healthy range – quietly, automatically, and reliably.

Advice →Expert advice: +49 7664 50559-0

The problem

When humidity becomes damage

Every person releases several liters of water into the indoor air daily through breathing, showering, cooking, and drying laundry. If this moisture remains in the room, it condenses on the coldest surfaces.

Mold on exterior walls
Surface moisture rises on cold exterior walls, room corners, and behind furniture. Mold spores germinate at surface humidity levels of around 80% – long before visible condensation forms.
Health & dust mites
Humid air is an ideal climate for dust mites and mold. Their spores irritate the respiratory tract, aggravate allergies and asthma, and are particularly stressful for children and sensitive individuals.
Musty, damp basements
In summer, warm, humid outside air flows into the cool basement and condenses on the cold walls – airing out makes it damper instead of drier. Result: damp laundry, musty odors, mildew stains.
Material damage
Persistent humidity causes plaster to flake, wallpaper to peel, wood to swell, and metal to rust. Stored furniture, books, and supplies are damaged – repairs cost many times more than dehumidification.

The solution

Getting a targeted grip on humidity

Instead of just airing out and hoping, a DÖLCO dehumidifier removes exactly the right amount of water from the indoor air in a controlled manner, so that mold no longer finds a breeding ground.

Dry rooms,
The right device for every room
From compact dehumidifiers for the bedroom to high-performance units for hobby basements and laundry rooms – mobile, on casters, no installation required, ready for immediate use.
Automatic hygrostat
Set the desired humidity – the device regulates itself automatically, switches on when the air is too humid, and pauses at the target value. This saves electricity and keeps the climate stable.
Quiet continuous operation
Robust, low-maintenance, and quiet enough for occupied rooms – optionally available with a condensate pump for direct water drainage, without having to empty a tank.
Advice from the manufacturer
DÖLCO develops and produces in Freiburg. You receive a well-founded recommendation on which performance level suits your room, moisture source, and goal.

Expertise

Humidity, mold & the cool basement

For a healthy indoor climate, a relative humidity of about 40 to 60% at 20–22 °C is considered ideal. If humidity is permanently above this, the risk of mold increases; significantly below this, the air feels dry and irritating. Relative humidity is the decisive factor: warm air holds much more water than cold air – at 30 °C over 30 g/m³, at 10 °C just under 9 g/m³. The same amount of water quickly becomes critical in cool rooms.

Mold does not need standing water. It finds growth conditions at a relative surface humidity of about 80% (some species from 70%). The tricky part: 50–60% humidity in the middle of the room can already mean 80% surface humidity on a cold exterior wall. At 20 °C and 50%, a wall spot below about 12.6 °C – for example at thermal bridges or behind cupboards – is enough for mold to form. Lower indoor air humidity helps reduce this surface humidity.

In the basement, the logic is reversed: the walls are cool all year round. If warm, humid outside air flows in during summer, it cools below the dew point and releases water – summer ventilation makes the basement damper. A controlled dehumidifier with closed windows is better. For most residential and basement rooms at positive temperatures, a condensation dryer is the most economical solution; only at very low temperatures does an adsorption dryer work more effectively.

Humidity, mold & the cool basement

Products

The right DÖLCO devices

Which performance class suits your room depends on size, temperature, and moisture source – DÖLCO's consultation helps with the selection.

LE-200P – compact
Handy device for individual rooms: bedrooms with damp exterior walls, small basement rooms, storage closets. With automatic hygrostat, quiet in continuous operation.
LE-3600 – high-performance
Robust condensation dryer (~450 m³/h, ~33 l/24 h, up to approx. 60 m², ~360 W). For hobby basements, laundry rooms, and persistently damp lower floors – optionally with condensate pump.
Air purifier
Additionally reduces dust, spores, pollen, and germs – useful for allergy sufferers. Dehumidification against the breeding ground, air purification against existing contamination.
View all dehumidifiers →

FAQ

Frequently asked questions

Which dehumidifier is suitable for the basement?
For most occupied basements at positive temperatures, a condensation dryer like the LE-3600 series is the most economical solution. Room size and moisture source determine the necessary performance. In a very cold basement (below approx. 10–15 °C), an adsorption dryer may be more sensible.
At what humidity level does mold form?
Mold can grow from about 80% relative humidity on the wall surface – some species from 70%, without any visible water. Because surface humidity is higher on cold exterior walls than in the room, 60% indoor air humidity is often enough. Keep the indoor air at 40–60%.
How can I avoid mold?
Three levers: regular shock ventilation, keep cold spots clear and warm – and limit indoor air humidity to 40–60%. Where ventilation is not enough, a dehumidifier with automatic hygrostat takes over humidity control.
Doesn't airing out in summer make the basement drier?
Usually not. Warm summer air contains a lot of water; if it hits cool basement walls, it condenses there and makes the basement damper. Better: keep windows closed and work with a dehumidifier, or only air out briefly early in the morning.
How much electricity does a dehumidifier consume?
Modern condensation dryers are economical – the LE-3600 dehumidifies with around 360 W. Thanks to the automatic hygrostat, the device only runs when humidity is too high and pauses at the target value.

Advice

Which device fits your room?

Tell us the room size and moisture problem – we will recommend the right device. Free and without obligation.

📞 +49 7664 / 50559-0✉ info@doelco.de