Disclosed are methods and apparatus for providing pre-assembled modular structural louvered systems that include structural supports and louvers, and may also include dampers, actuators and wiring in pre-assembled modules that may be transported to a building site, tilted up into place, and installed. Embodiments of the present invention also provide methods and apparatus for providing pre-assembled modular structural louvered systems which include integrated vertical and horizontal structural supports, allowing for the elimination of some vertical and horizontal wall structures in a building by relying on the structural support provided in the modular louvered systems, thereby making more space available in the building for louvers and airflow.

A vented and water control paneling has improved drainage and integrated ventilation air space. The water control paneling may be fabricated with an omnidirectional relief pattern formed on its back surface. The relief pattern spaces the vented and water control paneling away from a structure to which it is secured, thereby providing an omnidirectional drainage plane between the back surface of the paneling and the structure. The omnidirectional drainage plane provides an unimpeded ventilation and drainage path of water and/or water vapor.

According to one embodiment, a flood vent includes a frame forming a fluid passageway through an opening in a structure. The flood vent further includes a door pivotally mounted to the frame in the fluid passageway for allowing a fluid to flow through the fluid passageway. The door has two opposing faces that include a first face and a second face. The flood vent further includes a first float positioned within the door in a location in-between the first face and a second float. Additionally, the first float is configured to allow the door to pivot in a first direction. The flood vent further includes the second float positioned within the door in a location in-between the second face and the first float. Furthermore, the second float is configured to allow the door to pivot in a second direction.

A vented and water control paneling has improved drainage and integrated ventilation air space. The water control paneling may be fabricated with an omnidirectional relief pattern formed on its back surface. The relief pattern spaces the vented and water control paneling away from a structure to which it is secured, thereby providing an omnidirectional drainage plane between the back surface of the paneling and the structure. The omnidirectional drainage plane provides an unimpeded ventilation and drainage path of water and/or water vapor.

A prefabricated wall with a ventilation mechanism is provided in the present invention. Generally, it includes a ventilation mechanism that lets air exchange in a room from the wall. People can adjust the inlet airflow with a controller. The ventilation mechanism has several holes on the outer surface which face to outside. The outdoor air can pass through the holes and filter into the inner room, consequently fulfilling the function of the ventilation duct. The room equipped such a prefabricated wall does not rely on an HVAC system to have fresh air exchange.

A flood prevention device, for example an automatically closing air brick, is provided. The flood prevention device can comprise a body having an outer side and an inner side with an opening and a channel formed through the body, and a valve comprising a flap and a buoyancy structure, wherein the flap is pivotally mounted to the body and allows gas to flow through the channel in an open position and seals the channel in a closed position.

According to one embodiment, a flood vent includes a frame forming a fluid passageway through an opening in a structure. The flood vent further includes a door pivotally mounted to the frame in the fluid passageway for allowing a fluid to flow through the fluid passageway. The door has two opposing faces that include a first face and a second face. The flood vent further includes a first float positioned within the door in a location in-between the first face and a second float. Additionally, the first float is configured to allow the door to pivot in a first direction. The flood vent further includes the second float positioned within the door in a location in-between the second face and the first float. Furthermore, the second float is configured to allow the door to pivot in a second direction.

A vent barrier system may include an insert and a cover. The insert may be dimensioned to be inserted within a flood vent duct through a first opening such that side faces of the insert contact sidewalls of the duct and thereby provide an insulative seal between the first opening and a second opening of the duct when inserted therein. The may be configured to be attached to the insert and be dimensioned to be selectively securable to vent at the first opening. The cover may be manipulatable to selectively remove the insert from the duct.

A water damaged floor (10) is dried by forming an opening (18) in a flooring (14) of the floor and creating and forcing an airflow from a surrounding space (28) through the opening (18) into a ventilating space between the flooring (14) and a subfloor (22). According to the invention, an end portion of the flooring (14) is elevated from the subfloor (22) for creating said ventilating space and for creating an air passage (27) between the ventilating space and the surrounding space (28) at an edge of the flooring (14).

A plurality of flood prevention units are vertically stacked one over another inside a frame mounted over ventilation opening on a wall. Each unit includes a buoyant gate pivotally mounted by one or more pivotation members about a horizontal axis transverse to sidewalls of the frame for pivotation of the gate on rise of water buoyantly lifting the gate rotationally upwardly between said sidewalls for engagement with an upper deck horizontally connecting the sidewalls. A limiter limits the extent of self-actuation rotation of the gate. The gates are open during non-flooding conditions, allowing ventilation through the building opening, and sequentially close from lowest to highest on rise of water activating each gate in order, allowing ventilation to continue until the highest gate is closed.