In an era of material shortages and rising material costs, what should we prioritize and protect?

セイホープロダクツ業務本部

Under the floor and in the attic... "Invisible spaces" are being reconsidered now The environment surrounding the housing industry has changed significantly in recent years. Rising timber prices, increased costs of equipment, a shortage of skilled workers, and prolonged delivery times are not temporary changes but are becoming entrenched as structural changes in the entire housing industry. Furthermore, in recent years, the global surge in resource prices, the depreciation of the yen, and rising logistics costs have compounded the situation, leading to a generally unstable environment for housing-related materials. What was once taken for granted—that "necessary materials can be obtained immediately when needed"—is no longer a given. Additionally, the construction and equipment industries continue to face a serious labor shortage. In particular, the aging of veteran craftsmen who support the field is progressing year by year, while securing young talent is not easy. As a result, situations such as difficulty in scheduling construction dates, longer waiting periods until construction, and limited availability of contractors in certain regions are increasingly common nationwide. In the housing industry, there is a growing sentiment that "construction plans cannot be made with the same sense as before," whether for new builds or renovations, which is becoming the norm across the country. For more details, please be sure to read the 【related materials】【related links】 below. ↓ ↓ ↓

Under the floor and in the attic... the "invisible spaces" are being re-evaluated now.

The space under the floor and the attic quietly influence the "maintenance of housing performance."

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Related product information

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.

【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.
Underfloor Ventilation Series "Turbine Unit Type Bi"
Exhaust type + stirring type unit type

【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.
Underfloor ventilation unit "Kazetaro"
A comfortable indoor environment! Prevents condensation and extends the lifespan of the building.

【Features】 [Fu-taro Blower Type] ○ Adopts a duct system, allowing for flexible installation ○ Can be appropriately installed under water areas to exhaust humid air [Hybrid Controller] ○ Detects the amount of water vapor in the outside air and independently controls blower type/mixing type ○ When equipped with a phytoncide cartridge → Adds a "sterilization mode" to enhance effectiveness and operate efficiently 【Lineup】 [Underfloor Ventilation Hybrid Control System] ○ Fu-taro Unit Fu-taro Blower Type / Fu-taro Mixing Type [Underfloor Ventilation Fan] ○ Classic all-stainless steel type Fu-taro PF-20W ○ Dedicated external type Fu-taro PF-90R ○ 6-direction powerful mixing type SF-206 ● For more details, please contact us or download the catalog.
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.

【Specifications (Excerpt)】 <Common to TYPE-C and TYPE-D> ■ Electronic Dehumidifier - Rated Voltage: AC100[V] - Rated Frequency: 50/60[Hz] - Rated Power Consumption: 235[W] (normal), 130[W] (low operation) ■ Blower - Rated Voltage: AC100[V] - Rated Frequency: 50/60[Hz] - Rated Power Consumption: 26/30[W] * We also offer the 'Dry Pro Trial Kit' as a suggested product. * For more details, please refer to the PDF document or feel free to contact us.
Attic ventilation system 'Kazenosuke' blower 24 set
Measures against heat in the shed! Discharges accumulated heat and improves cooling efficiency! Effective against humidity, condensation, and VOCs!

【Features】 ○ Controller with temperature sensor → Detects the temperature in the attic and switches between high and low operation ○ Newly designed high-performance two-speed motor → Operates in high mode when the attic temperature rises, effectively exhausting hot air → Operates in low mode when the temperature drops ○ Reduces heat generation during motor operation, allowing for long hours of continuous use 【Product Lineup】 [24-Hour Ventilation Support System] ○ 24-hour ventilation type (for hot air countermeasures) Kazenosuke Blower 24 ○ Additional condensation countermeasure Kazenosuke Mixing 24 [Attic Ventilation Control System] ○ Blower-type ventilation (for hot air countermeasures) Kazenosuke Blower ○ Unit type (for condensation countermeasures) Kazenosuke Unit [Exhaust-type attic ventilation fan] ○ Gable and flat roof vent cap type BF-100 ● For more details, please contact us or download the catalog.
[For Residential Use] Underfloor Drying with Bamboo Charcoal Mats for Moisture Control
We support creating a comfortable living environment by controlling humidity.

【Features】 - Moisture control and deodorizing effect - Effective against mold and pest prevention - Protects important buildings - Energy-saving effect - Made from natural materials, environmentally friendly 【Our Strengths】 SEIHO is committed to supporting our customers by providing reliable technology and services. Our specialized staff will respond carefully to any questions or consultations regarding our products. For requests for materials or inquiries, please feel free to contact us at our toll-free number: 0120-278-900.
Special Discussion: "Humidity and Condensation Measures in Attics. The Importance of Ventilation."
The Future of Wind and Housing! A Discussion on the Current State of Attics in Japanese Homes.

The detailed content of the discussion can be viewed in the PDF materials or related links. For more information, please feel free to contact us.
Corrosion prevention measures due to condensation in humid environments.
Measures against condensation in summer! Condensation and corrosion within wall structures are often difficult to detect.

For more details, please refer to the PDF document or feel free to contact us.
Experiment on the effect of using a ventilation system on indoor air conditioning electricity consumption.
The reduction rate is approximately 15% to 23%! We confirmed energy-saving effects by ventilating the attic.

"Comparison of temperatures in the attic, indoors, and human body using a thermotracer" ■ Conditions: Building A - with ventilation system; Building B - without ventilation system ■ Measurement device: NEC San-ei Thermotracer TH-5100 *For more details, please refer to the PDF document or feel free to contact us.*
Comparison of moisture content in underfloor support timber
When the moisture content exceeds 20-25%, wood decay is more likely to occur.

For more details, please refer to the PDF document or feel free to contact us.
Solving floor moisture problems in homes with basic insulation methods.
The cause is a large amount of water vapor! The challenge is how to remove humidity and suppress mold and decay.

【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.
[Effect Verification Test] Underfloor Dehumidifying Blower "Dry Pro"
After about one month, a drier condition (wood moisture content 12%) was confirmed!

【Experimental Results】 <Temperature and Humidity Data> ■ Building A - Humidity decreases only during dehumidification operation, and then returns to high humidity, but gradually dries out with repeated dehumidification operations every day. - After about 2 months, an average dry state of approximately 70% RH is confirmed even outside of dehumidification operation hours. ■ Building B - There is a temporary slight drying effect due to external air influence. - Humidity does not drop below 90% RH and a high humidity state is confirmed. <Wood Moisture Content Data> ■ Building A - The wood does not rise from the state of dry wood. - After about 1 month, a drier state (wood moisture content of 12%) is confirmed. ■ Building B - The wood gradually becomes moist from the state of dry wood. - After about 2 months, the wood moisture content rises to 25%. *For more details, please refer to the PDF document or feel free to contact us.
Product Special Feature Page <PDF Materials Provided>
Explanation of the usefulness of underfloor ventilation, underfloor dehumidification, attic ventilation, and security.

[Featured Products (Excerpt)] ■ Underfloor Ventilation Series ■ Underfloor Dehumidification Series ■ Attic Ventilation Series ■ Security Series ■ Other Products Available *For more details, please refer to the materials. Feel free to contact us with any inquiries.