Ventilating your cellar properly: Put an end to damp and mould

Basements place high demands on adequate ventilation. They are often damp, smell musty and provide the ideal conditions for mould growth. In basements with little or no insulation in particular, constantly high humidity causes the walls to become damp. With the right ventilation, you can ensure an optimal basement climate. That is why effective humidity-controlled basement ventilation is needed to ensure an optimal basement climate.

Why traditional window ventilation in basements is often harmful

The danger of summer condensation

Many homeowners make the mistake of ventilating their homes during the day on hot summer days.

The problem:
warm outside air contains a lot of moisture. When it hits the cool walls in the basement, it cools down and can no longer hold the water.

The result:
The moisture condenses on the walls – the ideal breeding ground for mould.

The rule of thumb:
Only ventilate when the outside air is colder and drier than the inside air.

It is therefore important to prevent mould growth by ensuring adequate ventilation.

The LUNOS innovation: Why we do not use dew point controls

Conventional basement ventilation systems often rely solely on dew point control. However, this usually comes into play too late to provide genuine protection for the building.

The problem with conventional dew point control

Dew point control only reacts when moisture physically condenses – in other words, when it is already ‘wet’. The problem is that mould starts to grow at 80% humidity, long before the dew point is reached. This means that structural damage occurs even while the dew point control is still giving the ‘green light’.

The intelligent alternative from LUNOS

Instead of relying on slow external sensors, our basement ventilators have integrated mini-computers. These continuously analyse the microclimate directly in the device:

• Self-sufficient sensor technology: Our controls do not require error-prone external sensors. They detect all relevant parameters directly at the ventilator.
• ‘Sniffing mode’: Even when ventilation is not active, the fan briefly moves the air to obtain highly accurate measurement data from inside the room.
• Real-time analysis: The system continuously creates driving profiles. It immediately detects whether ventilation is currently advisable or whether (e.g. on muggy summer days) humid air from outside would only exacerbate the problem.
• User-independent protection: The system works inconspicuously in the background. It automatically reduces performance when conditions are unfavourable and uses optimal time windows (such as cool summer nights) for intensive dehumidification.

Your advantage: an intelligent system that prevents mould from forming before it can develop – fully automatic, highly efficient and without manual intervention.

If you answer ‘yes’ to more than two questions, an automated ventilation solution is highly recommended to maintain the value of your property.

Silvento ec with cellar board 5/KE: The intelligent guard against moisture

When it comes to pure exhaust air solutions, the Silvento ec in combination with the specialised 5/KE control board is the gold standard for your basement. This system actively thinks for itself to effectively prevent structural damage.

• Inverse humidity control: The board works with a high-precision algorithm that continuously monitors the absolute humidity in the basement. It immediately detects whether ventilation would improve or worsen the situation – and thus protects your basement from unwanted moisture ingress from outside.
• Fully automatic & self-sufficient: Thanks to stored reference values, the Silvento ec activates exhaust air mode exactly when it is needed. Manual intervention is no longer necessary.
• Individually customisable: Integrated DIP switches allow the base load, demand air stages, interval and time functions to be precisely adjusted to the size and use of your basement.
• Maximum building protection: Intelligent control keeps your basement permanently dry, even under difficult climatic conditions.

LUNOS e² & ego: Decentralised housing ventilation with heat recovery

If you use your basement as a fully-fledged living space, hobby area or laundry room, the e² and ego are the perfect partners. They combine highly efficient building protection with maximum comfort thanks to integrated heat recovery.

• The e² for living cellars: as one of the world's smallest fans in its class, it ensures continuous cross ventilation when used in pairs. It keeps the heat in the room while quietly transporting stale, humid air outside – ideal for home offices or fitness rooms.
• The ego for utility rooms: The ideal 2-in-1 solution for laundry rooms or basement bathrooms. The ego requires only a single hole in the outer wall, as it provides both supply and exhaust air at the same time. This means that peaks in humidity (e.g. when drying laundry) are immediately removed without the room cooling down.
• Save energy & stop mould: Both systems use the energy from the exhaust air to preheat the incoming fresh air. This saves heating costs and ensures a consistently low humidity level below the critical mould threshold.