A ventilation duct for a fire rated ventilation duct wall penetration has one or more metal sheets forming said duct, wherein said metal sheet duct is covered on the outside by a heat insulating material, and said duct includes elongated stiffening members located on the outside of the duct and attached to said metal sheets. The stiffening members each comprises a metal profile and at least one non-combustible bar of inorganic material. The metal profile is fixed to the metal sheet of the duct and retains the non-combustible bar by at least partly encircling the bar.

This application relates to ventilation systems, more particularly to roof ventilation systems that help to protect buildings against fires. The roof vent has an ember impedance structure that impedes the entry of flames and embers or other floating burning materials while still permitting sufficient air flow to adequately ventilate a building. Several configurations of vents employing baffle members and fire-resistant mesh material are described, which can substantially prevent the ingress of floating embers and flames.

Improvements in an outside house vent that blocks embers, water and rain that can cause damage to a house of building. The prevention of fire and ember intrusion into a building prevents fires in homes where invalids and children are left alone. The prevention of water into structure further reduces the potential for mold growth in the attic or walls of a home or structure. The filtering further prevents intrusion of creatures such as but not limited to bugs, insects, bees, wasps, animals, critters and other flying and crawling animals from entering the building. The vent is a fireproof set of louver or filter pads with fire arresting screens that is passed through a wall that vents into the building. The vent can be installed on old and new construction to provide improved fire prevention, increase the value and salability in fire prone areas.

A ridge vent having a top side including a top wall with a bottom surface, a bottom side spaced apart from the top side, a side wall connecting the top side to the bottom side and an air outlet positioned in one of the top wall or the side wall. The ridge vent including a fire resistant material adjacent the bottom surface of the top wall. The ridge vent forms air flow path directing air through the vent and out of the air outlet. In a first position, the fire resistant material is not in the air flow path. In a second position, the first resistant material blocks the air flow path in response to the ridge vent being exposed to excessive heat.

A ventilation fan according to the invention comprises a fan module, a fire damper module and a cover module. The fire damper module comprises a link frame, a fire damper body and an adjustment element. The fire damper body is disposed in the link frame and detachably linked up with the link frame. The adjustment element is disposed on the fire damper body and near an opening of a flange of the fire damper body. The adjustment element comprises a fixed portion, a stop portion and a trace portion. Wherein the stop portion abuts and shields the opening when no electrical wire passing through the opening. Wherein when the cover module comprises an electronic device having an electrical wire, the trace portion abuts the opening and the electrical wire passing through the trace portion and the opening to connect to the fan module.

A fire-rated ventilation duct system and improvements therein. According to an embodiment, the fire-rated ventilation duct section comprises, an inner liner configured as conduit for air movement, the inner liner comprising a metallic material and having a first end and a second end, and the first end including a first connection section, and the second end including a second connection section; an outer casing configured for encasing the inner liner, the outer casing comprising a metallic material having a fire-rating, the outer casing having a first end and a second end, and the first end including a first duct connection section configured for joining one end of a second fire-rated ventilation duct, and the second end including a second duct connection section configured for joining one end of a third fire-rated ventilation duct; an insulation layer configured to provide a thermal insulation layer between the inner liner and the outer casing, and the first connection section of the inner liner further comprising a first liner spacer and the second connection section of the inner liner further comprising a second liner spacer, the first and the second liner spacers being configured to define a cavity for receiving and positioning said insulation layer between an outer surface of the inner liner and an inner surface of the outer casing; the first duct connection section of the outer casing being configured to attach to at least a portion of the first connection section of the inner liner, and the second duct connection section of the outer casing being configured to attach to at least a portion of the second connection section of the inner liner to form a sealed duct section.

A fire-rated exhaust duct system comprising a modular configuration or structure. The fire-rated exhaust duct system comprises a plurality of exhaust duct sections. Each of the exhaust duct sections is configured to be joined or connected with other exhaust duct sections in the field or at an installation site, e.g. in building housing a kitchen facility or a laboratory facility to form longer sections or runs for exhaust duct system.

A fire-rated ventilation duct system and improvements therein. According to an embodiment, the fire-rated ventilation duct section comprises, an inner liner configured as conduit for air movement, the inner liner comprising a metallic material and having a first end and a second end, and the first end including a first connection section, and the second end including a second connection section; an outer casing configured for encasing the inner liner, the outer casing comprising a metallic material having a fire-rating, the outer casing having a first end and a second end, and the first end including a first duct connection section configured for joining one end of a second fire-rated ventilation duct, and the second end including a second duct connection section configured for joining one end of a third fire-rated ventilation duct; an insulation layer configured to provide a thermal insulation layer between the inner liner and the outer casing, and the first connection section of the inner liner further comprising a first liner spacer and the second connection section of the inner liner further comprising a second liner spacer, the first and the second liner spacers being configured to define a cavity for receiving and positioning said insulation layer between an outer surface of the inner liner and an inner surface of the outer casing; the first duct connection section of the outer casing being configured to attach to at least a portion of the first connection section of the inner liner, and the second duct connection section of the outer casing being configured to attach to at least a portion of the second connection section of the inner liner to form a sealed duct section.

This application relates to ventilation systems, more particularly to roof ventilation systems that help to protect buildings against fires. The roof vent has an ember impedance structure that impedes the entry of flames and embers or other floating burning materials while still permitting sufficient air flow to adequately ventilate a building. Several configurations of vents employing baffle members and fire-resistant mesh material are described, which can substantially prevent the ingress of floating embers and flames.

There is disclosed a passive intumescent fire damper having a metal housing, an inner meltable liner and having a metal and intumescent laminate assembly surrounding the inner liner.