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  6. Why does condensation occur in waterproof structures?

Why does condensation occur in waterproof structures?

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G-Breath

last updated:Jun 08, 2026

NTTアドバンステクノロジ
NTTアドバンステクノロジ
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The cause of the malfunction is "humidity"! Why? Explaining the reason for condensation occurring inside the waterproof structure!

Factors causing "high humidity" and "condensation" within waterproof structures and the challenges of previous humidity control measures It may be thought that there are no condensation issues with waterproof structures, but failures can occur due to condensation and high humidity. Even if humidity is reduced using dehumidifying materials because it is high, if the factors causing that humidity to rise are not addressed, the humidity will rise again, necessitating the replacement of the dehumidifying materials with new ones. Repeating this incurs costs each time. Understanding the causes of failures arising from the humidity rising, falling, and condensing within waterproof structures, and implementing appropriate measures is the shortcut to a solution. If you are interested, please contact us through the "Contact Us" section on our NTT Advanced Technology G-Breath website.

    Board materials
防水構造も結露する表紙.jpg

Why does condensation occur in waterproof structures?

防水構造も結露する表紙.jpg
防水構造も結露する表紙.jpg

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basic information

Common Inquiries ■ Does waterproof construction lead to humidity rising above 50% and then to condensation? ■ At what temperature does condensation occur? How to check the dew point temperature? ■ Are daily temperature fluctuations exceeding the humidity range for electrical products? ■ Why does the tank fill up with water despite having waterproof construction and dehumidifying materials? ■ What are the challenges of moisture-absorbing materials and moisture absorption during high humidity and moisture release during low humidity? ■ Does the amount of water vapor change if the usage environment differs, even for the same product? ■ Moisture has been infiltrating from such areas. ■ What are the failures caused by condensation and high humidity?

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For information on prices and purchasing methods, a list of retailers is available on our NTT Advanced Technology G-Breath website.

Applications/Examples of results

Please contact our NTT Advanced Technology G-Breath homepage. Waterproof electrical products ■ Control panels, distribution boards, terminal boxes, connection boxes ■ IoT, Wi-Fi, 5G, wireless base stations, antennas, radar ■ Surveillance cameras, monitoring equipment ■ Disaster prevention measuring instruments, sensors, communication devices ■ Building equipment, LED lighting, storage batteries, door horns ■ Electrical equipment for rivers, dams, ports, etc. ■ Power equipment and devices, solar power, wind power, storage batteries, receiving panels ■ Equipment boxes along railway lines, railway vehicles, station surveillance cameras, communication devices, wireless devices, power equipment ■ Water supply and sewage facilities, remote monitoring devices ■ Broadcasting equipment and devices, satellite broadcasting equipment ■ Electrical equipment for traffic lights, ETC, etc. along roads, road information display equipment, emergency alarm equipment ■ Manufacturing equipment, measuring instruments, food-related devices in factories ■ Increasing applications for use in humidity control during product transportation and storage. The causes of high humidity and condensation are various. We will clarify the causes and recommend appropriate measures.

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NTTアドバンステクノロジ

NTTアドバンステクノロジ

Industrial Electrical Equipment

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