Besides this innovation there is another innovation. Slaats BV has developed a first new S.F.P. -valve fire damper. This fire damper is mounted in the air duct and closes at a temperature of about 60 degrees. This means that in case of a fire the affected area is completely closed off from the air duct. This is the principle of "the lid on the pan" in case of a fire. This fire damper is unique because it keeps the fire in the department controllable and no power or control equipment is needed.