ATE MAX Light Grey – Electromagnetic Anti-Damp Device for Wall Drying
Premium solution against wall damp and rising damp
The ATE MAX Light Grey is a high-range electromagnetic device designed to effectively dry damp walls, even in large buildings, old houses, or areas highly exposed to humidity. Thanks to its polarity inversion technology, it acts directly at the source, without chemical injection.
This model covers a 30-meter radius (60 meters in diameter) and offers a long-lasting solution against rising damp.
🔄 How it works
Damp walls naturally generate an electric potential difference, which encourages water to rise from the ground. The ATE MAX emits a very low-frequency electromagnetic field that reverses the polarity of water molecules present in porous materials (brick, stone, etc.). This inversion forces the moisture to flow back down by gravity to the foundations.
This process is silent, constant, and non-intrusive.
✅ Advantages of the ATE MAX Light Grey
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Effective range: 30 meters radius (60 meters diameter)
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Operates silently, without vibration, no maintenance required
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Ultra-low power consumption: 0.75 W (~€15/year)
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No damage to the building – suitable for old or fragile walls
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Passive technology, no chemicals
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Made in France – 10-year warranty
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Fast and free delivery
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Certified according to European standards (EMF, RoHS, EMC)
📘 ATE MAX User Manuals
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French – Download manual
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Declaration of Conformity – Download document
📐 Technical Specifications
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Dimensions: 322 x 232 x 32 mm
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Power supply: 12 V
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Power consumption: 0.75 W
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Coverage area: 60 meters diameter
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Installation: easy wall mounting (on load-bearing, preferably damp walls only)
📑 Certifications
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Low Voltage Directive 2014/35/EU
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EMC Directive 2014/30/EU
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RoHS Directive 2011/65/EU
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WEEE Directive 2012/19/EU
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EMF Certification – non-harmful waves (tested by Emitech)
📊 Expected Results
Results are typically visible within 18 to 24 months, depending on the building’s condition, wall composition, and adherence to installation guidelines.
🛠️ Installation Recommendations
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Installation height: 30 cm to 1 m from the floor
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Minimum distance: 1.50 m from any electronic device
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Mandatory support: load-bearing or structural damp wall (never on plasterboard)
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Mounting: like a picture – do not move after installation
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Must remain plugged in permanently (very low energy use)
💡 For optimal results:
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Remove film-forming coatings
Strip 10 to 20 cm above the damp area to allow the wall to breathe. -
Ensure proper ventilation
Install or check for a ventilation system, window vents, and undercut doors (1.5 to 2 cm). -
Restore the walls after drying
Remove surface salts, then reapply breathable coatings with anti-salt additives (lime recommended). -
Install drainage if needed
In case of lateral water infiltration, drainage helps direct water away before it reaches the foundations.
❗ Important
This device is designed to treat rising damp. It cannot eliminate:
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Active water infiltration
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Flood damage
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Visible mold
These problems require separate complementary treatments.







Jean-pierre-Avis Leroy Merlin –
I recently purchased a device to combat wall humidity, and I am delighted with my purchase. The device works very well, and I have already noticed a significant improvement. Moreover, the price was really affordable, which is a great bonus! I highly recommend this product to anyone facing humidity issues at home.
David-Avis Leroy Merlin –
As a professional, I have installed the ATE LC30 for clients, and they are delighted. The device works perfectly, providing reliability and performance. The installation is simple and quick, which is a real advantage. I highly recommend the ATE LC30 for its proven quality and effectiveness.
Mariab-Avis Leroy Merlin –
The ATE device works very well. The humidity in my walls disappeared within a few months. Very satisfied, I highly recommend it.
Virginie-Avis Lery Merlin –
I am very satisfied with my purchase! The package arrived very quickly, well before the expected date. The product perfectly meets my expectations. In fact, I bought the same product as some of my family members, who were already very happy with it.
Sylvain-Avis Leroy Merlin –
Too bad this product is not available in stores and only online. However, the purchase was easy and the delivery was fast.