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  3. セイホープロダクツ 業務本部
  4. [Revised Edition] Guide to Underfloor Measures That Must Be Checked and Addressed After Heavy Rain Disasters
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  • Sep 10, 2025
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Sep 10, 2025

[Revised Edition] Guide to Underfloor Measures That Must Be Checked and Addressed After Heavy Rain Disasters

セイホープロダクツ セイホープロダクツ 業務本部
In homes where "flooding under the floor" has occurred due to heavy rain, various damages and risks of secondary damage may be lurking in unseen areas. To protect the durability of the house and the health of the family, we have organized the points that should be prioritized for inspection and action. 【Table of Contents】 1. Why is inspecting under the floor essential? 2. 【Emergency Checkpoints】First, check here! A. Presence of flooding or moisture B. Condition of the wood C. Presence of unusual odors D. Signs of termites or pests E. Condition of ventilation openings 3. Immediate response methods when damage is discovered - Mild situations with little standing water or moisture - - Situations with standing water where structural impact is a concern - The damage from flooding under and above the floor due to heavy rain requires significant recovery efforts, including cleanup. We sincerely sympathize with those who have been affected. Please be sure to read the 【related materials】【related links】. ↓ ↓ ↓
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[Revised Edition] Guide to Underfloor Measures That Must Be Checked and Addressed After Heavy Rain Disasters | SEIHO PRODUCTS
Post-Typhoon and Heavy Rain Underfloor Checkpoints and Countermeasures | SEIHO PRODUCTS
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タービン・ユニット Type Ai無塗装.jpg

Underfloor Ventilation Series "Turbine Unit Type Ai"

Exhaust type + diffusion type unit! A subfloor ventilation series that detects humidity conditions and draws in dry air from beneath the floor.

The system detects the amount of water vapor (absolute humidity) and independently controls the exhaust ventilation system and the diffusion-type blower. When there is a high amount of water vapor, only the diffusion-type blower operates, and when it is low, the exhaust ventilation system operates in conjunction, bringing in dry air from below the floor. POINT 1: Optimal independent operation of exhaust and blowing with absolute humidity sensors POINT 2: Optimal deodorization operation with standard phytoncide POINT 3: Detects abnormalities in the underfloor ventilation fan and underfloor water issues, displaying them on the controller. 【Features】 ○ Effective against underfloor moisture, condensation, and mold ○ Powerful exhaust and diffusion For more details, please contact us or download the catalog.

  • Ventilation system
  • Unit and other construction
  • Air compressors, blowers and pumps

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タービン・ユニット Type Bi無塗装.jpg

Underfloor Ventilation Series "Turbine Unit Type Bi"

Exhaust type + stirring type unit type

The system detects the amount of water vapor (absolute humidity) and independently controls the exhaust ventilation system and the mixing fan. When there is a high amount of water vapor, only the mixing fan operates, and when it is low, the exhaust ventilation system operates in conjunction to bring in dry air from below the floor. POINT 1: Optimal independent operation of exhaust and air supply using absolute humidity sensors POINT 2: Optimal deodorization operation with standard phytoncide POINT 3: Detects abnormalities in the underfloor ventilation fan and water issues, displaying them on the controller. 【Features】 ○ Effective for underfloor moisture, condensation, and mold prevention ○ Powerful exhaust and mixing For more details, please contact us or download the catalog.

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風太郎ユニット(かくはんマイナーチェンジ).jpg

Underfloor ventilation unit "Kazetaro"

A comfortable indoor environment! Prevents condensation and extends the lifespan of the building.

The "Kazetaro" underfloor ventilation system forcibly introduces air into the crawl space, maintaining a comfortable condition for the wood. It is particularly effective in eliminating condensation. Underfloor ventilation also impacts the indoor environment, reducing conditions that promote the growth of dust mites and mold, thus benefiting the health of the family. The Kazetaro unit features a hybrid sensor that detects the amount of water vapor (humidity) in the outside air, and a hybrid controller that independently controls the Kazetaro blower type and Kazetaro mixing type, creating optimal ventilation operation for the wood in the crawl space. 【Features】 ○ Prevents the breeding of pests by improving ventilation effectiveness ○ Forcibly introduces air into the crawl space to prevent condensation ○ Maintains a comfortable condition for the wood, extending the lifespan of the building ○ Reduces conditions for the growth of dust mites and mold, creating a comfortable indoor environment For more details, please contact us or download the catalog.

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風太郎ベーシック(SS).jpg

Underfloor ventilation system "Fuutaro Basic"

Equipped with a water immersion sensor! Detects leaks due to flooding under the floor, deterioration of drainage pipes, and other damages!

"Kazutarou Basic" is a localized underfloor ventilation system designed to address areas prone to moisture accumulation, such as around water sources and the north side of buildings. Equipped with a flooding sensor, it quickly detects not only underfloor flooding caused by water damage but also leaks due to deterioration or damage to drainage pipes, providing peace of mind by alerting you to abnormalities. We offer two models: the "Kazutarou Basic SS" with a timer type and flooding sensor, and the standard timer type "Kazutarou Basic." 【Features】 ■ Equipped with a flooding sensor ■ Detects underfloor flooding and leaks due to deterioration or damage to drainage pipes ■ Supports environments where natural ventilation is insufficient with forced ventilation ■ Safety measures against increasing underfloor flooding and leaks *For more details, please refer to the external link page or feel free to contact us.

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top.jpg

Underfloor electronic dehumidification unit 'DRY PRO' Ver3

Contributes to the suppression of condensation and mold under the floor. A new model compatible with the foundation packing method has been introduced.

The "DRY PRO" Ver3 is an electronic dehumidifying and ventilation unit for underfloor use, combining a Peltier cooling device with a dedicated stirring and diffusion-type blower. In addition to the diffusion-type model "TYPE-D" for foundation insulation methods, a new model "TYPE-C" compatible with foundation packing methods has been added to the lineup. It can dehumidify even in areas where moisture tends to accumulate by stirring a wide range of air. It helps suppress moisture and condensation under the floor, contributing to the prevention of mold, pests, and decay fungi in wooden components. Furthermore, with the version upgrade in June 2024, a powerful dehumidification operation mode has been added. The surrounding temperature range for dehumidification operation (low-temperature dehumidification operation range) has been expanded, now accommodating surrounding temperatures down to 5°C. 【Features】 ■ Easy installation with a φ22 drainage hole (no drainage pump required) ■ Automatic operation possible with a dedicated indoor controller ■ The direction of the aluminum duct of the blower can be set freely ■ Dehumidification capacity of 1800mL per day (depending on conditions) ■ Uses non-fluorinated electronic cooling technology ■ Compatible with underfloor flooding sensors (optional) *For more details, please refer to the PDF document or feel free to contact us.

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Related catalog(5)

Underfloor Ventilation Series "Turbine Unit"

Underfloor Ventilation Series "Turbine Unit"

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Underfloor electronic dehumidification unit 'DRY PRO' Ver3

Underfloor electronic dehumidification unit 'DRY PRO' Ver3

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Underfloor ventilation "Kazetaro"

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Is a ventilation fan under the floor necessary?

Is a ventilation fan under the floor necessary?

TECHNICAL
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[Revised Edition] Guide to Underfloor Measures That Must Be Checked and Addressed After Heavy Rain Disasters

[Revised Edition] Guide to Underfloor Measures That Must Be Checked and Addressed After Heavy Rain Disasters

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Exclusive sales for employees, fan clubs, and communities — now more flexible than ever.

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We have launched a new “Audience Control Feature” for TwooCa Mall, enabling merchants to limit product visibility and sales to specific companies, organizations, and communities. With this feature, merchants can now: ✔ Offer employee-exclusive discounts and company sales ✔ Create fan club or community-only merchandise sales ✔ Customize product visibility for specific user groups In addition, by integrating with TwooCa’s payment functions and digital-money-convertible point system, the platform provides a seamless purchasing experience for users. This feature is designed to support value creation in closed communities such as: ・Employee welfare programs ・Fan clubs ・Membership communities ・Sports teams We will continue expanding TwooCa Mall as a platform optimized for employee engagement, member experiences, and community-based commerce. ▼ Press Release https://prtimes.jp/main/html/rd/p/000000108.000076589.html #TwooCa #EmployeeBenefits #Fintech #Cashless #HRTech #CommunityCommerce #SportsBusiness #FanEngagement #DX

May 15, 2026

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HK-2

Recommended for earthquake measures for automatic doors and equipment! Seismic device HK-2.

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Japan is one of the top 10 countries in the world with frequent earthquakes. The 2020 White Paper on Land, Infrastructure, Transport and Tourism has also reported an increase in the probability of major earthquakes occurring. Regarding the Nankai Trough earthquake, the probability of an earthquake with a magnitude of 8 to 9 occurring within the next 30 years is estimated to be 70 to 80%. At Hotron, we recommend the introduction of seismic devices for earthquake countermeasures in buildings and equipment. The seismic device 'HK-2' is a product that automatically performs various controls that have been pre-set when it detects strong shaking equivalent to a seismic intensity of 5 lower or higher. For example, it can automatically execute actions such as: "Open automatic doors and gates to secure evacuation routes and access for emergency vehicles" "Transmit signals to the control room and stop facility equipment" "Unlock the keys to locked lockers" "Automatically play voice guidance" For more details, please download the materials or contact us.

May 14, 2026

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Hotron foot switch

[Free Catalog Distribution] Reduce the risk of virus and bacteria infection! Hotron's non-contact switch series.

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The "Hotron Non-Contact Switch" allows you to open and close doors without directly touching door knobs or switches, making it hygienic! You can choose from two types: the "Hand Wave Sensor," which only requires you to wave your hand, and the "Foot Switch," which only requires you to place your foot at the entrance. It reduces the risk of virus and bacterial infections in places where hygiene is a concern, such as food factories, restaurants, hospitals, and nursing facilities. 【Features】 ○ Reduces the risk of virus infection by allowing door operation without contact ○ A wide variety of options to choose from based on application and location ○ Ideal for places where hygiene is a priority, such as food factories and medical facilities ○ Prevents unnecessary detection due to the switch mechanism 【Product Lineup】 ■ Hand Wave Sensor Series ○ Exposed waterproof type, front, down, and side-facing types "PF-R5" ○ Exposed type, front-facing type "PF-R1" ○ Embedded type, front-facing type "PF-U2" ○ Exposed type, downward wide type "PF-R4" ■ Foot Switch Series ○ Slim type with wide opening, vertical beam type "PF-01S" ○ Slim type with wide opening, horizontal beam type "PF-03S" ○ Standard type, horizontal beam type "PF-05" ◎ For more details, please download the catalog or contact us.

May 14, 2026

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Exhibition at the "Hokkaido Civil Engineering and Architecture Future Technology Expo 2026"

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We will be exhibiting at the "Hokkaido Civil Engineering and Architecture Future Technology Exhibition 2026," which will be held for two days from May 27 at the Daiwa House Premist Dome (Sapporo City, Hokkaido). This exhibition aims to provide valuable information to the construction industry in Hokkaido regarding their efforts in DX (Digital Transformation) and GX (Green Transformation), as well as to showcase and allow experiences with a variety of construction machinery, surveying equipment, and digital technologies. Our goal is to contribute to the operational efficiency of construction companies in Hokkaido and to address the challenges faced by the construction industry. On the day of the event, we will be showcasing the "High Water Content Soil Improvement Agent MT Series," so if you are nearby, please feel free to stop by. Event Name: Hokkaido Civil Engineering and Architecture Future Technology Exhibition 2026 Dates: May 27, 2026 (Wednesday) 9:30 AM - 4:00 PM May 28, 2026 (Thursday) 9:30 AM - 4:00 PM Venue: Daiwa House Premist Dome (1 Hitsujioka, Toyohira Ward, Sapporo City, Hokkaido) Organizer: Hokkaido Civil Engineering and Architecture Future Technology Exhibition Executive Committee Supported by: Hokkaido Development Bureau of the Ministry of Land, Infrastructure, Transport and Tourism, Hokkaido, Hokkaido Board of Education, Sapporo City, and others Hokkaido Civil Engineering and Architecture Future Technology Exhibition 2026 HP https://www.caft-exhibition.com/

May 14, 2026

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[Notice] Recruitment for participants has started for the paid course "Excavation Reinforcement Soil Method Implementation Seminar" to be held on June 12, 2026 (Friday).

[Notice] Enrollment has started for the paid course "Excavation Reinforced Soil Method Implementation Workshop" to be held on June 12, 2026 (Friday).

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"This is a paid seminar, but it comes with a limited-time web authentication key." We will hold a paid seminar for the software "Reinforced Soil" calculation system. Enrollment for participants has begun. This is a CPD accredited seminar. Certificates of attendance for obtaining CPD credits from other organizations can be issued. Please check the detailed announcement page below for more information.

May 14, 2026

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