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  5. Ventilation system
  6. Underfloor Ventilation Series "Turbine Unit Type Ai"

Underfloor Ventilation Series "Turbine Unit Type Ai"

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UN-TUAi-DBH/DBPH

last updated:Oct 01, 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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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 systemUnit and other constructionAir compressors, blowers and pumps
タービン・ユニット

Underfloor Ventilation Series "Turbine Unit Type Ai"

タービン・ユニット Type Ai無塗装.jpg
タービン・ユニット Type Ai無塗装.jpg 床下ブロワー(追加用単体)無塗装02.jpg 吹出ノズル+取付用ステー付.jpg スリムノズル.jpg パイプフード(2019年12月21日よりシルバーメタリックライト色に変更となります。).jpg 床下浸水センサー(別売オプション).jpg
  • Related Link - https://www.seiho-sdk.co.jp/products/590/
  • Special site - Product/service details - https://pr.www.ipros.com/seiho-sdk/product/

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basic information

【Features】 ○ Extends the lifespan of your home ○ Contributes to family health ○ Complies with building standards ○ Improves basic performance ○ Optimal operation with hybrid controller ● For more details, please contact us or download the catalog.

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Underfloor Ventilation Series "Turbine Unit"

Underfloor Ventilation Series "Turbine Unit"

PRODUCT
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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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Cultivating trust with underfloor ventilation fan users.

Cultivating trust with underfloor ventilation fan users.

TECHNICAL
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[Newsletter] WIND FROM FUTURE Special Edition

[Newsletter] WIND FROM FUTURE Special Edition

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

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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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Is a underfloor ventilation fan necessary?

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Some of you may be hesitant about introducing the effective equipment for pest control under the floor and preventing foundation deterioration (moisture control), known as "underfloor ventilation fans." Why is ventilation under the floor necessary? We have created a page that clearly summarizes the effects of forced ventilation and installation. Under the floor, a certain area of openings is required by the Building Standards Act. In other words, it mandates that there must be a ventilation opening of a certain size for moisture control under the floor. However, when looking at actual single-family homes, there are always ventilation openings, whether they are square grilles or full-perimeter ventilation with foundation packing methods. In recent years, homes using foundation insulation methods (especially in northern regions like Hokkaido) have also been built, but in this method, the underfloor is connected to the interior, and the underfloor is considered part of the interior, so there are no ventilation openings under the floor to prioritize insulation effectiveness. The adoption rate of foundation insulation methods is still low, but moisture issues are not nonexistent. I would like to touch on this topic on another occasion. Please be sure to read the 【related materials】【related links】. ↓ ↓ ↓

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Ways to Utilize Phytoncides

Building trust with underfloor ventilation fan users.

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The Importance of Customer Management The decline in population due to the aging society and low birthrate has become a social issue, affecting the consumption activities of the public. How can we overcome this? Acquiring new customers is important. At the same time, maintaining relationships with customers that we have worked hard to acquire is arguably even more important. This is because connecting with new customers (business development) incurs the highest costs for a company. If existing customers are satisfied and continue to purchase various products and services, contributing to the company's revenue, it will reduce the costs needed for acquiring new customers, or allow for more investment in business development. Our company has been focusing on the utilization of items aimed at strengthening customer touchpoints, while experimenting and refining our approach. This time, we will organize and present the details of that effort.

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Checkpoints and measures for underfloor inspection after typhoons and heavy rain.

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"Because it's an unseen place, we won't overlook it." Japan's climate is hot and humid, and particularly after typhoons and heavy rains, the conditions for homes become harsh. It's not just the roof and exterior walls that are affected by rain and wind. The area beneath the floor is actually the most susceptible and often overlooked point. This time, we will explain the "checkpoints under the floor" that should be confirmed after a typhoon or heavy rain, the "responses" if abnormalities are found, and measures to prevent recurrence. [Table of Contents] ■ Why is a floor check necessary? ■ Checkpoints to confirm after a typhoon or heavy rain ■ Responses when damage is discovered ■ Points for preventing recurrence ■ Suggestions from Seihou Products ■ Summary 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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