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  1. Home
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  3. Construction, work and methods
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  5. Heat insulation and heat shielding methods
  6. Solving floor moisture problems in homes with basic insulation methods.

Solving floor moisture problems in homes with basic insulation methods.

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last updated:Jul 24, 2025

セイホープロダクツ 業務本部
セイホープロダクツ 業務本部
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The cause is a large amount of water vapor! The challenge is how to remove humidity and suppress mold and decay.

Foundation insulation is a method of insulating the foundation that faces the outside air. The period when the risk of condensation and mold is highest with foundation insulation is from June to September of the first year after completion. The main cause is the large amount of water vapor coming from the concrete floor. Especially, wood that contains a lot of moisture significantly deteriorates in strength, so it is important to be cautious considering durability against earthquakes and typhoons. As a solution to these humidity problems, our company has developed a dedicated underfloor dehumidifier called "Dry Pro." It effectively eliminates humidity and condensation, and is useful for preventing mold, pests, and decay fungi in the underfloor wooden components. (Patent and design application pending) 【Features of Dry Pro】 ■ Dehumidification capacity of approximately 400-600cc per day on humid days during the rainy season and summer ■ Circulates dehumidified air widely using a blower ■ Quiet design: 45/44dB ■ Standard equipped with phytoncide that has deodorizing effects *For more details, please refer to the PDF materials or feel free to contact us.

    Safety SuppliesInsulation workHeat insulation and heat shielding methods
2019-11-06_11h06_08.png

Solving floor moisture problems in homes with basic insulation methods.

2019-11-06_11h06_08.png
2019-11-06_11h06_08.png 2019-11-06_11h06_43.png 2019-11-06_11h06_24.png 2019-11-06_11h07_09.png
  • Related Link - https://www.seiho-sdk.co.jp/news_letter/2478/
  • Special site - Product/service details - https://pr.www.ipros.com/seiho-sdk/product/

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【Other Features】 ■ Dehumidification air volume: 133/138m²/h ■ Easy installation by drilling a φ22 hole for drainage ■ Flexible duct system allows for free expansion and contraction ■ Powerful dehumidification in sealed underfloor spaces with electronic cooling module ■ Dehumidification operation can switch between "Normal (Strong)" and "Weak" ■ Stable installation even on uneven floors with adjustable function ■ Compact dehumidifier for easy installation *For more details, please refer to the PDF document or feel free to contact us.

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【Purpose】 ■Solving moisture problems under the floors of houses built with foundation insulation methods *For more details, please refer to the PDF document or feel free to contact us.*

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Published on the importance of ventilation! [Newsletter] WIND FROM FUTURE Vol.45

Published on the importance of ventilation! [Newsletter] WIND FROM FUTURE Vol.45

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Is a ventilation fan under the floor necessary?

Is a ventilation fan under the floor necessary?

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Remote live inspection service

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■Live Inspection Start Our company conducts inspections to provide our clients with a deeper understanding of the effectiveness, safety, and installation information of the products they sell. This includes visits to our simulation studio, experimental laboratory, test house, and production line. By observing the visualization of product effects, safety tests, and durability test scenes, we have received feedback such as "I have gained a deeper knowledge of the products" and "I can confidently propose to end users." We are pleased to announce the launch of our 'Remote Live Inspection Service,' focusing on smoke simulation and security systems, which have been the main features of our inspections. Taking into account feedback such as "I am interested, but it's difficult to come to Fukuoka due to the distance" and "It's challenging to coordinate schedules for multiple people," the content will be a condensed version, but we will provide an interactive explanation similar to what you would experience in person. 【Flow of Remote Inspection】 ■ For underfloor ventilation... Approximately 30 minutes ■ For security... Approximately 20 minutes ■ Q&A... About 10 minutes

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Heat dissipation fins for the dehumidifier.

Product condition and underfloor environment of the Dry Pro type-C after approximately 2.5 years of use.

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This is a report on the inspection results after approximately two and a half years of using the Dry Pro Type-C in the newly added crawl space (foundation packing method) during the renovation. The inspection results showed that there was no dust or other substances adhering to the heat dissipation fins of the dehumidifier, the dehumidifying fins, the intake of the blower, or the fan that could negatively affect performance. Additionally, there were no foreign substances or dust adhering to the drain hose for dehumidified water or the pump tank that could adversely impact performance, and all components were functioning normally. (Photo: Heat dissipation fins of the dehumidifier) The newly added crawl space was located on the north side in a poorly ventilated area, but no signs of mold or condensation were observed, confirming that a dry state was maintained. (Photo: Installation status) Please be sure to read the [related materials] and [related links]. ↓ ↓ ↓

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セイホープロダクツ

セイホープロダクツ 業務本部

Building materials, supplies and fixtures manufacturers

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In the 21st century, the way human society exists on a global scale is being questioned. In this era of rapid change, what kind of aspirations should we have when engaging in business? SEIHO's new concept naturally emerged from such inquiries. "Compassion" is the new concept. Rather than pursuing extravagant ideas, we want to delve deeper into a simple concept that everyone can be confident in. We wish to return to our origins to realize this concept. In a time when a diverse array of information is overflowing, misjudging the clear distinction between "purpose" and "means" can render even effective technologies futile. SEIHO will firmly place "principles, fundamentals, and essence" as the axis of our management decisions, learning from the wisdom of past sages while creating genuine technologies and services that benefit society.

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