Is a underfloor ventilation fan necessary?

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

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.

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

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.

• Ventilation and smoke exhaust equipment
• Unit and other construction

"Humidity" that affects the lifespan of the house and the health of its residents. The cause may be the ventilation in the crawl space or attic? Introducing products for humidity control in homes! Free materials on "The Importance of Ventilation" available!

Are you taking measures against humidity in your home? - The underfloor storage in the kitchen and bathroom smells musty. - The flooring creaks. - There are stains and mold on the ceiling and in the closet... - The air conditioning is not effective. This may be due to humidity in the crawl space or attic. Hidden issues in these areas can significantly affect the lifespan of the house and the health of its occupants. Seiho Products offers solutions for home troubles with products that provide underfloor ventilation and dehumidification, attic ventilation, and devices that detect leaks caused by flooding or deterioration and damage to drainage pipes, alerting you to abnormalities. <Product lineup> *Partial excerpt - Underfloor ventilation system - Underfloor dehumidification system - Underfloor flooding sensor with timer *New release - Attic ventilation system If you are struggling with humidity, condensation in the crawl space, or heat and condensation in the attic, please consult us! Presentations using demo units and ventilation effect experiment boxes are also available. Please contact us for conditions. Additionally, we offer a document featuring a column on foundation insulation methods that may cause mold and condensation. Download it along with our product catalog!

• Underfloor storage unit
• Ventilation system

Improved air conditioning efficiency! A ventilation system that eliminates the causes of condensation and prolongs the life of your home.

The "Kaze no Suke Blower 24" is a system that continuously ventilates the attic for 24 hours, lowering the air pressure compared to the forced-ventilated interior, which prevents chemical substances from flowing into the room and creates a safe living environment. It detects the temperature in the attic with a temperature sensor and allows for switching between strong and weak operation. Additionally, it features a condensation mode that is effective for removing condensation. 【Features】 ■ Discharges hot air and improves cooling efficiency - Reduces excessive use of air conditioning, benefiting family health and saving on electricity bills. ■ Shuts out condensation - Actively circulates air in the attic to minimize temperature differences, eliminating the causes of condensation and prolonging the life of the building. ■ Supports the health of the family and home - With high ventilation capacity, it effectively expels formaldehyde and VOCs from the attic to the outdoors. *For more details, please refer to the PDF document or feel free to contact us.

• Ventilation system
• Roof and gutter construction

The "HA-T Series" is an energy-saving automatic door sensor that opens only for those who want to enter, whether on a busy street or in a narrow passageway. The automatic door opens simply by bringing your hand close, addressing hygiene concerns even in facilities used by a large number of people. Depending on the application and installation location, you can choose between "Non-vision Mount Type/HA-T401" and "Non-vision Built-in Type/HA-T520." 【Recommended for such places!】 ☑ Entrance facing a busy passageway ☑ Presence of counters or signs near the door ☑ Buildings facing narrow passageways ☑ Buildings that prioritize aesthetics ☑ Hospitals and facilities that consider hygiene ☑ Large facilities with many doors 【Features】 ● Adaptable to various door types with four detection spot settings ● Reduces unnecessary opening and closing to minimize power consumption, contributing to energy-saving effects ● Equipped with a light touch function, allowing the door to open and close simply by waving your hand, ensuring hygiene ● Can also be used as a wide detection range non-vision infrared sensor ◎ For more details, please download the materials or contact us.

Starting from January 2026, we are pleased to announce that by linking the measurement data collected on the "Fieldroid Cloud" with the BIM/CIM cloud "KOLC+" provided by Cork Inc., it has become possible to centrally display measurement data summaries on the digital twin. (Examples) Measurement of various environmental data using Cloud Logger LTE Forecasting wind speed, rainfall, and heat index using Signroid 2 Temperature and humidity measurement during concrete curing using Ondroid Slope monitoring using Guraloid Displacement measurement using the shape displacement measurement system "G-Gauge" The data measured by the above services is sent to the cloud, enabling graph displays and alert email notifications. With the implementation of the data linkage function, it is now possible to visualize the latest measurement data from the Fieldroid Cloud on the digital twin constructed in "KOLC+". For more details, please check the content on the linked page.

Regarding the "quotation" used at the forefront of sales activities: "Do we need to save everything when we revise it to Ver.1, Ver.2, etc., every time the amount or specifications change?" "Should we also keep the data from other companies that were not selected in competitive quotations?" Have you ever wondered about these questions? The Electronic Bookkeeping Act strictly demands the "authenticity" of data, but saving all processes is a significant burden for the field. This time, we will clearly explain the boundaries of the preservation obligation in a case study format, incorporating interpretations from the latest National Tax Agency Q&A. *You can read the full text from the note in the "Related Links." [Contents of this article] 1. The boundary of the preservation obligation lies in "sending to external parties." Items sent externally are "generally required to be preserved." Items that have not been sent externally have "no preservation obligation." 2. Judgment from the sending side: "Is it linked to a transaction?" 3. Judgment from the receiving side: "The perspective of the 'Corporate Tax Act' is important." ■ Note! "Version revisions" and "corrections/deletions" are different things. ■ A smart way to ensure reliable "version management." ■ Summary.

We plan to exhibit at the Disaster Prevention Industry Exhibition 2026, which will be held at Tokyo Big Sight in the last week of January. We will showcase products such as the "Electric Stair Climbing Human Cart," an electric stair climbing device that allows people to ascend and descend stairs while seated in a wheelchair. Please be sure to visit our booth. ------------------------------- Our booth number: 7B-38 ------------------------------- 【Dates】January 28 (Wednesday) to January 30 (Friday), 2026, 10:00 AM to 5:00 PM 【Venue】Tokyo Big Sight, East Hall 【Admission Fee】Free for registered attendees, those with invitations, and junior high school students and younger. *For others, an admission fee of 1,000 yen will be charged.

We plan to exhibit at the HVAC&R JAPAN 2026, the 44th Refrigeration, Air Conditioning, and Heating Exhibition, to be held at Tokyo Big Sight in the last week of January. You will be able to experience our stair dollies series, industrial endoscopes, and more. Please be sure to visit our booth. ------------------------------- Our booth number: 4A-07 ------------------------------- 【Exhibition Name】HVAC&R JAPAN 2026, the 44th Refrigeration, Air Conditioning, and Heating Exhibition 【Dates】January 27 (Tuesday) to January 30 (Friday), 2026, 10:00 AM to 5:00 PM (until 4:00 PM on the last day) 【Venue】Tokyo Big Sight, East Exhibition Halls 4, 5, and 6 【Admission】Pre-registration required (free)