#Japan #Itabashi #Sanwa Shutter #Shakunetsu Guard #Heat Insulation

Industry First: Heat Insulating Door 'Shakunetsu Guard'

Sanwa Shutter Industrial Co., Ltd., headquartered in Itabashi, Tokyo, has introduced a revolutionary product to the market: the 'Shakunetsu Guard.' Released in March 2020, this heat-insulating door has become the first in the industry to receive the ministerial certification from Japan's Ministry of Land, Infrastructure, Transport, and Tourism for its ability to insulate against heat for 60 minutes. This is a significant achievement for the company as of June 2025. The certification number is EH060-0003.

With the enforcement of a revised law in April 2024 aimed at achieving a decarbonized society, new architectural legislation now allows for the partial wooden construction of large buildings, including certain sections where the 'Shakunetsu Guard' can be applied. It is designed to meet the performance requirements for specific openings in these designated areas, offering fire protection features that include a heat insulation capability lasting for 60 minutes.

The door features filled heat insulation materials within its frame, which helps to suppress temperature rise in adjacent spaces in the event of a fire. This makes it particularly suitable for use as fire doors in critical areas such as evacuation routes or temporary shelters for vulnerable individuals in hospitals and care facilities during emergencies.

Key Features

1. Heat Insulation Beyond Fire Resistance
The 'Shakunetsu Guard' not only fulfills fire resistance requirements but also adheres to the standards established for thermal insulation performance within fire protection devices. This dual function enables the door to keep the temperatures of both itself and adjacent spaces under control during a fire incident, ultimately leading to its certification from Japan's Ministry of Land, Infrastructure, Transport, and Tourism. Notably, it is the first domestic product to combine heat insulation capabilities with fire protection.

2. High Fire Performance with Design Consistency
The door integrates advanced locking mechanisms, maintaining an aesthetic and usability consistent with standard steel doors while also ensuring the added benefit of heat insulation. This aspect is crucial for high-traffic areas, allowing for seamless entry and exit without compromising the overall design or functionality.

Pricing and Specifications

• - Price: 1,350,000 yen (tax included; installation, transportation, and other costs not included)
• - Dimensions: Width = 880mm, Height = 2000mm

Please note that the information above is based on the release date and may be subject to change without prior notice regarding specifications or pricing.

For builders and engineers, the introduction of the 'Shakunetsu Guard' represents a significant move towards enhanced safety and heat management in building design. Sanwa Shutter is paving the way for better fire safety technologies in large-scale construction while also complying with the stringent regulations needed for modern architecture. This innovative approach is not just a response to existing challenges but also a proactive step towards creating an environment that prioritizes public safety and emergency preparedness.