Abstract: A ridge vent system is provided including a ridge vent having opposing exterior sidewalls that each define multiple fastener recesses that extend inward from the exterior sidewalls and downward from a top plate, where each recess has multiple recess slots that cooperate with adjacent sidewall slots to form contiguous vented areas along each of the opposing exterior sidewalls to provide enhanced attic ventilation and/or airflow through the ridge vent, while still providing fastener recesses that facilitate rapid and efficient application of fasteners therethrough.

Abstract: An improved isolation ward structure includes a top portion further comprising a space, a fresh-air pipe, a communication pipe and a an exhaust-connected pipe wherein the space is furnished with an air filtration unit (FFU); an end of the communication pipe is communicated with the fresh-air pipe while its other end is communicated with the air filtration unit (FFU), an end of the exhaust-connected pipe is communicated with the fresh-air pipe; a bedroom being positioned under the air filtration unit (FFU) will let the air which is filtered through the air filtration unit (FFU) enter the bedroom; a bottom portion being positioned under the bedroom has a semi-hermetic space formed by the plurality of elevated honeycomb floors; the air within the bedroom will enter the semi-hermetic space which will let the pathogenic air within the bedroom (10) flow therein via the plurality of honeycomb floors (22) and re-circulate through the air filtration unit (FFU) to be filtered; and a backflow circulation portion being p

Abstract: A venting device of a structure is provided that includes first and second panel sections. The first panel section includes a top panel portion and a base panel portion located opposite the top panel portion. The second panel section includes a top panel portion and a base panel portion located opposite the top panel portion. A bottom surface of the base panel portion of the first panel section faces a top surface of the top panel portion of the second panel section. A polyurethane reactive (PUR) adhesive is located between the bottom surface of the base panel portion of the first panel section and the top surface of the top panel portion of the second panel section which holds the bottom surface of the base panel portion of the first panel section and the top surface of the top panel portion of the second panel section together.

Abstract: A roof vent device for use with a ceiling rafter is provided. The roof vent device provides apertures to provide for fluid flow to ventilate the roof space of ceilings.

Abstract: Ridge vents and deck covers are disclosed that have a fibrous mesh mat and a moisture barrier. The mesh mat may be contoured to define a variety of structures and may have regions of relatively higher fiber density and regions of relatively lower fiber density. Solar cells may be exposed on the ridge vents to collect solar energy when the vents are exposed to sunlight.

Abstract: Disclosed is an apparatus for venting buildings, specifically attic spaces, such vents being predominantly shape-conform to the components from which a wall or a roof is built (typically tiles, in the context of roofs), the vent typically being fabricated from a metallic, plastic, or ceramic core as well as one or more layers from other materials or compounds which modify the overall characteristics of the vent, such as the surface characteristics. Furthermore disclosed are methods of manufacturing such ventilation apparatuses.

Abstract: An end fitting for an exhaust pipe includes a cylindrical body having an upper opening and a lower opening. An inclined upper board is mounted in the cylindrical body. An upper passage is defined between a side of the upper board and an inner periphery of the cylindrical body. A first set of drain holes is defined in the lowest portion of the upper board. An inclined lower board is mounted in the cylindrical body and is located below the upper board. A lower passage is defined between a side of the lower board and the inner periphery of the cylindrical body. The lowest portion of the lower board is connected to the cylindrical body. The cylindrical body includes a cylindrical wall having a second set of drain holes. A ledge extends from the inner periphery of the cylindrical body and is located below the lower board.

Abstract: An electric motor includes: a control board including circuitry for controlling the electric motor; a cover with an interior space; and a sensor device coupled to the motor and extending into an external environment, the sensor device being thermally isolated from the interior space of the cover and including a sensor configured to measure at least one environmental characteristic of the external environment.

Abstract: A vent is disclosed that is particularly suited to use in ventilating attic spaces beneath a hip roof. The vent is configured to be installed along a hip of the roof overlying and covering a ventilation slot formed through the roof deck along the hip. The vent includes an elongated laterally flexible top panel from which baffle arrays depend. The baffle arrays are formed of a plurality of depending arcuately curved vanes that arc away from the vent. The vanes are aerodynamically shaped to redirect wind-blown rain and snow away from the vent and are configured to block the migration of rain and snow through the vent. A pair of spongy conformable filler strips is attached beneath the edge portions of the vent. The filler strips conform to the shapes of underlying shingles when the vent is installed to fill any gaps that otherwise might be formed between the vent and the shingles.

Abstract: A photovoltaic module including a surface and at least one spacer juxtaposed with the surface. The at least one spacer is positioned intermediate the surface and the roof deck. The photovoltaic module is elevated from the roof deck by the spacer to promote air flow underneath the photovoltaic module. The spacer is made from a material that provides impact resistance and walkability.

Abstract: A roof vent is made from convoluted filaments. The roof vent includes a center section, a first end section, and a second end section, all made from convoluted filaments. The first and second end sections each include a top layer made from convoluted filaments and a bottom layer made from convoluted filaments. The thickness of the first end section may be substantially the same as a thickness of the center section. A filter may cover the top of the center section, the tops, ends, sides, and bottoms of the first and second end sections, and a portion of a bottom of the center section, leaving a middle portion of the bottom of the center section uncovered by the filter.

Abstract: A roof ridge and hip ridge vent system for contoured roofs which include a vent slot located through the roof structure. A contoured roofing material forms the roof surface. Vent strips are provided on the roof surface that extend on each side of the vent slot. The vent strip is comprised of synthetic fibers that are randomly aligned into an open web by an air flow and then joined by a phenolic or latex binder to form an air permeable mesh material having a generally uniform thickness, a density of about 0.08 to 0.1 grams per cubic centimeter (1.3 to 1.6 grams per cubic inch), and a crush recovery of at least 80%. A first longitudinally extending groove extends from the bottom surface about 40% to 60% of a height of the vent strip and is located a distance of at least about 1 inch from a downslope side.

Abstract: A vent is disclosed that is particularly suited to use in ventilating attic spaces beneath a hip roof. The vent is configured to be installed along a hip of the roof overlying and covering a ventilation slot formed through the roof deck along the hip. The vent includes an elongated laterally flexible top panel from which baffle arrays depend. The baffle arrays are formed of a plurality of depending arcuately curved vanes that arc away from the vent. The vanes are aerodynamically shaped to redirect wind-blown rain and snow away from the vent and are configured to block the migration of rain and snow through the vent. A pair of spongy conformable filler strips is attached beneath the edge portions of the vent. The filler strips conform to the shapes of underlying shingles when the vent is installed to fill any gaps that otherwise might be formed between the vent and the shingles.

Abstract: The present invention is a heat extraction, waterproof, and daylighting roof device, which includes a water leakage top assembled above a roof. The water leakage top has a first air vent and a left end edge. A left extension water leakage top, a right extension water leakage top, an expel air vent, and a guide plate are mounted above the first air vent, and water leakage holes are provided between the left extension water leakage top and the water leakage top. The guide plate is positioned below the expel air vent; the guide plate is provided with an upward facing right crooked plate and an upward facing left crooked plate on two sides thereof. The left crooked plate is provided with a plurality of overflow holes, during heavy rain, the guide plate provides a function similar to an overflow container that prevents spilling over to the first air vent.

Abstract: Systems and modular devices for roof or ground-level stormwater management are disclosed. A modular stormwater management device includes a water retention mat structured to absorb stormwater, a rigid frame structured to support the water retention mat, and a perforated surface structured to permit drainage of the stormwater from the water retention mat through the perforated surface. A modular stormwater management system includes a plurality of modular stormwater management devices, each of the modular stormwater management devices including a water retention mat structured to absorb stormwater, a rigid frame structured to support the water retention mat, and a perforated surface structured to permit drainage of the stormwater from the water retention mat through the perforated surface.

Abstract: Ridge vents are configured to cover an open ridge of a roof and allow a flow of air to exit from the open ridge through the ridge vents. The ridge vents include a projection and a projection receiving area. When a first ridge vent is secured over a ridge opening, the projection of a second ridge vent is at least partially receivable in the projection receiving area of the first ridge vent.

Abstract: A roofing system in a building structure having a ridge vent includes strips of composite material having a base material adapted to form a hermetic seal with the top surface of a roofing section and recesses in a top surface in which an air permeable material can be positioned. A strip is applied to roof sections adjacent to each side of a ridge vent so that a ridge cap can overlay the strips in spaced relation from the underlying roof sections and be sealingly secured to the roof sections. The strip material establishes a barrier between the ridge cap and the roof sections through which air can pass, but through which the passage of rain and insects is inhibited.

Abstract: A roof ridge vent comprises a body including inner and outer surfaces, first and second ends, and first and second sides. First and second edge portions disposed at or about the first and second sides, respectively, include vent openings for the passage of air and baffles for shielding the vent openings. A central portion is disposed between the first edge portion and the second edge portion. The central portion has a first height, and the body tapers as it extends laterally outward from the central portion to the first edge portion and second edge portion such that the first and second edge portions have a reduced height.

Abstract: A roof ventilation system is provided that is configured to be mounted on a profiled paneled roof for venting air from a vent opening in the roof. The roof ventilation system can include a vent part having a plurality of vent passages, a plurality of plies configured to be mounted substantially horizontal to the profiled roof panels and a plurality of cross members extending between each ply, wherein the plies and cross members define the vent passages; and a filter member attached to outer surfaces of the vent part. The filter member can be made from a resilient material, and the filter member may include extensions extending beyond a length of the vent part.

Abstract: Disclosed is an apparatus for venting buildings, specifically attic spaces, such vents being predominantly shape-conform to the components from which a wall or a roof is built (typically tiles, in the context of roofs), the vent typically being fabricated from a metallic, plastic, or ceramic core as well as one or more layers from other materials or compounds which modify the overall characteristics of the vent, such as the surface characteristics. Furthermore disclosed are methods of manufacturing such ventilation apparatuses.

Abstract: A roof vent is made from convoluted filaments. The roof vent includes a center section, a first end section, and a second end section, all made from convoluted filaments. The first and second end sections each include a top layer made from convoluted filaments and a bottom layer made from convoluted filaments. The thickness of the first end section may be substantially the same as a thickness of the center section. A filter may cover the top of the center section, the tops, ends, sides, and bottoms of the first and second end sections, and a portion of a bottom of the center section, leaving a middle portion of the bottom of the center section uncovered by the filter.

Abstract: A vent for a roof or other structure, comprising a cavity housing portion and an outside-housing extension portion including an extension footing extending from a lower edge of a louvered ventilation side. The extension footing includes footing sub-portions to obstruct gaps between the extension footing and the structure, such as a plurality of tabs extending from the extension footing corner-edge biasing the free edge of the tab downwardly below the extension footing.

Abstract: A roof ridge vent system for roofs which includes a vent slot located through the roof structure along the roof ridge. A vent strip is provided that has a sufficient width to extend over the vent slot and partially over the shingles on each side of the vent slot. The vent strip has a longitudinal groove on an upper side located in a medial position that extends the length of the vent strip. The longitudinal groove forms a fold line to define a ridge line of the roof. Longitudinally extending glue strips are provided on a lower side of the vent strip adjacent to each of the longitudinal sides, which are adapted to contact the roofing on either side of the vent slot.

Abstract: A temperature modulating blanket utilizing a reflective surface to block radiation away from a phase change material during daylight and in thermal conductivity with the material to allow heat conduction out of the material at night at a faster rate than it is absorbed during the daylight. The blanket may be well suited for modulating temperatures of storage and other facilities. Additionally, the facilities may be uniquely configured to promote an attic circulation that further facilitates freezing and recharge of the phase change material of the blanket during night hours. For example, a secondary blanket utilizing a phase change material of a higher melting point may be placed at an elevated vent of a roof defining the attic to encourage such circulating and blanket recharge.

Abstract: 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.

Abstract: The invention relates to a client computer for updating a database stored on a server via a network, the server being coupled to the client computer via the network, wherein the database comprises a set of first relations, wherein each first relation in the set of the first relations comprises first data items, wherein for each first relation the first data items are encrypted with a respective first cryptographic key in the first relation, wherein the first data items form a partially ordered set in each first relation, in each first relation the partial order being formed with respect to the first data items of said first relation in non-encrypted form.

Abstract: The invention relates to a client computer for updating a first relation in a database stored on a server via a network with an update first data item, the server being coupled to the client computer via the network, wherein the first data items are encrypted with a first cryptographic key in the first relation, wherein the first data items form a partially ordered set in the first relation, the partial order being formed with respect to the first data items in non-encrypted form, wherein the client computer has installed thereon an application program, the application program being operational to perform the steps of sequentially requesting and decrypting encrypted first data items and providing a storage request to the data base in case a position for storing the update first data item is determined.

Abstract: A roof ventilation system is provided that is configured to be mounted on a profiled paneled roof for venting air from a vent opening in the roof. The roof ventilation system can include a vent part having a plurality of vent passages, a plurality of plies configured to be mounted substantially horizontal to the profiled roof panels and a plurality of cross members extending between each ply, wherein the plies and cross members define the vent passages; and a filter member attached to outer surfaces of the vent part. The filter member can be made from a resilient material, and the filter member may include extensions extending beyond a length of the vent part.

Abstract: A vent for a roof includes a body having an inner surface facing the roof, an outer surface, first and second opposing ends and first and second opposing sides. First and second edge portions are disposed at or about the first and second sides, respectively, and include a plurality of openings for the passage of air. A plurality of protrusions extend outwardly from the inner surface of the body. A plurality of elongated resilient members extend longitudinally between the first and second ends of the body and cooperate with the protrusions. At least a portion of each of the elongated resilient members extends beyond a bottom edge of the vent and is compressed against the exterior surface of the roof, in order to substantially fill in and seal spaces between the exterior surface of the roof and the at least one vent.

Abstract: A ridge vent for tile roofs is provided having a vent strip located on each side of a roof ridge. The ridge vent includes a center water dam having a centering portion and two leg portions, with the centering portion being located over a ridge board. The vent strips includes a vent material, formed from a non-woven mat, including a first surface, which matches a surface of the tile roof, and a second surface. An upper water barrier is attached to the second surface of at least one of the vent strips and extends over the roof ridge. The ridge vent is rollable and can be provided as one piece or as separate components.

Abstract: 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.

Abstract: A notched plastic roofing batten with a pair of side walls having V-shaped notches at regular intervals therealong such that measured sections of the batten can be removed to achieve a desired overall length in the field by manually cutting or breaking the batten at one of the V-shaped notches.

Abstract: An illustrative embodiment of the present disclosure provides a ridge vent having a longitudinally-extending top panel, a longitudinally-extending first side, a longitudinally-extending second side, and a first end. The longitudinally-extending top panel is bendable along a longitudinally-extending axis. The longitudinally-extending first side is composed of a longitudinally-extending first arcuate side panel having a concave shape directed toward the ridge vent interior. And the longitudinally-extending second side is composed of a longitudinally-extending second arcuate side panel having a concave shape directed toward the ridge vent interior.

Abstract: A structural batten provides a longitudinally extending first layer having a plurality of passages extending between opposing sides of the first layer and transverse to the longitudinal extent of the first layer. A longitudinally extending solid body layer is attached to the first layer along the first layer's longitudinal extent.

Abstract: A high snow-load ridge ventilator includes a pair of support brackets, a perforated support, a ridge cover and a plurality of cover spacers. A bottom of one support bracket is attached to one side of a ventilation opening and a bottom of the other support bracket is attached to the other side of the ventilation opening. A plurality of perforated support spacers may be attached to the roof along a length of a pair of support brackets to provide additional load carrying capability. The perforated support is a formed plate with a plurality of perforated openings. The perforated support is attached to a top of the pair of support brackets. The plurality of cover spacers are attached to a top of the perforated support. The ridge cover includes snap clips that are sized to receive snap flanges extending from the perforated support.

Abstract: A hip ventilator preferably includes a plurality of lower intermittent spacers, a pitched perforated support member, a plurality of upper intermittent spacers, a plurality of hip covers and two hip cover end caps. First and second water dams are attached to a top of the hip roof. The plurality of lower intermittent spacers are then attached to the hip roof over the first and second water dams. The pitched perforated support member is placed on top of the plurality of lower intermittent spacers. The plurality of upper intermittent spacers are attached to the plurality of lower intermittent spacers. The plurality of hip covers are snapped on to the pitched perforated support member. The two hip cover end caps are attached to the roof and two hip covers. A deflector strip is preferably attached adjacent each side of the hip ventilator.

Abstract: A natural convection roof device includes a first roof drainage panel, a first extended roof drainage panel, a second roof drainage panel, an inner barrier and an inner roof containing an inner ventilation opening disposed obliquely to the first roof drainage panel. The top end of the first roof drainage panel includes the first extended roof drainage panel, and the top end of the first extended roof drainage panel is assembled with the second roof drainage panel and the inner barrier. The bottom ends of the second roof drainage panel and the inner barrier are installed on the inner roof. The lower side of the inner barrier is center ventilation openings. Above the second roof drainage panel is ventilation holes, and below the second roof drainage panel is drain holes. The level of the ventilation holes is higher than that of the inner ventilation opening.

Abstract: An apparatus is provided comprising: a radiating panel mountable to a surface such that the panel is directed towards a night sky and cooled via radiation heat loss to the night sky, and air proximal the panel is cooled by transferring heat thereto which radiates the heat via the heat loss, the panel being sloped such that ambient air proximal an outer surface of the panel flows towards a lower portion of the panel as the ambient air cools, the ambient air being further cooled due to further contact with the panel as the ambient air flows towards the lower portion; a plurality of air openings in the lower portion of the panel, for the ambient air cooled by the panel to pass there through; and, an air collection space defined at least in part by the panel for receiving cooled ambient air passing through the air openings.

Abstract: A construction system for releasing moisture from a building is provided. The system is especially suitable for use in buildings having a hip, valley or gable roof. More specifically, the device gives the hip, valley or gable roof adequate ventilation and moisture vapor release portals so as to allow air and water vapor to properly rise through the interior of the hip, valley or gable roof and out through ridge vents without becoming trapped by rafters of the hip, valley or gable roof. The system has a first unit and a second unit, wherein the first unit allows air and water vapor to pass through passageways of the first unit up through the underside of the hip, valley or gable roof up and out through the ridge vent(s) and the second unit allows air from the exterior to pass into the roof cavity to circulate through the roof cavity and into the first unit.

Abstract: A vent system includes a plurality of vent panels. Each vent panel includes a body having first and second sidewalls and first and second end walls. Each of the first and second end walls includes a first set of lateral vents and a second set of lateral vents. The first set of lateral vents is disposed at a first angle relative to the first end wall and a second set of lateral vents is disposed at a second angle relative to the second end wall. A first vented portion is disposed between the first sidewall and the body. A second vented portion is disposed between the second sidewall and the body. The first and second vented portions each include laterally-extending vent supports that define a plurality of vent openings that support the flow of air therethrough. A plurality of flexure vanes are disposed on each of the first and second sidewalls. A flexure channel is disposed adjacent to each of the plurality of flexure vanes that allow for some flexure of the vent panel.

Abstract: A vented ridge cap assembly can include an upper ridge cap member and one or more non-continuous members configured to support the ridge cap member at a position spaced above a roof of a structure. The non-continuous members include one or more gaps to allow air to pass there through. The ridge cap assembly can optionally include a non-continuous member with one or more folds so as to define two or more parallel walls which can provide enhanced rigidity and/or wind resistance. Optionally, the roof cap assembly can include lower mounting portions for mating with upper surface of a roof structure.

Abstract: A construction system for releasing moisture from a building is provided. The system is especially suitable for use in buildings having a hip, valley or gable roof. More specifically, the device gives the hip, valley or gable roof adequate ventilation and moisture vapor release portals so as to allow air and water vapor to properly rise through the interior of the hip, valley or gable roof and out through ridge vents without becoming trapped by rafters of the hip, valley or gable roof. The system has a first unit and a second unit, wherein the first unit allows air and water vapor to pass through passageways of the first unit up through the underside of the hip, valley or gable roof up and out through the ridge vent(s) and the second unit allows air from the exterior to pass into the roof cavity to circulate through the roof cavity and into the first unit.

Abstract: A mesh ridge vent has an air permeable layer formed of randomly aligned synthetic fibers that are opened and blended, randomly aligned into a web by airflow, joined by phenolic or latex binding agents, and heat cured to produce an air-permeable varying mesh. A moisture barrier may be integrally formed above the air permeable layer and may be defined by a coating or by a layer of fibers that is sufficiently dense to inhibit penetration of water into the web. The mesh ridge vent has edge portions and a central portion and the edge portions may be more dense and thicker while the central portion may be less dense and thinner than the edge portions.

Abstract: A roof ventilation system for asphalt shingle or composition roofs which include a vent slot located through the roof structure along a roof ridge is provided. An unrollable vent assembly that is installable in one piece is formed from an upper water barrier having first and second vent arrangements connected thereto, and each of the first and second vent arrangements include at least two continuous longitudinal strips of a vent material with a continuous longitudinally extending space therebetween separating the strips. The strips and the longitudinally extending space are positionable on the roof parallel to the ridge so that the first and second vent arrangements are located on each side of the ridge vent slot, respectively. The vent system prevent ingress of moisture and debris, and the upper water barrier extends between the first and second vent arrangements and over the vent slot in the installed position.

Abstract: A Z-closure member for raised seam roofs is formed through bending techniques into a shape having a ventilated central vertical member, an upper mounting flange terminating in an upper tab member, and a lower flange member extending in an opposing direction from the upper mounting flange member and terminating in a flexible locking tab. The lower flange is secured to a raised seam roofing panel with fasteners, while the vent cap formed with a return lip is engaged with the upper flange by capturing the upper flange within the return lip. A fastener can be inserted through the vent cap return lip and the upper flange to secure the vent cap to the Z-closure member. A mesh filter is trapped against the vertical member by the upper tab member and the lower flexible locking tab. A seal can be added to the lower flange to seal against the roofing panel.

Abstract: A roof vent used to cover a vent opening in the ridge of a roof that includes a base portion configured to extend generally longitudinally along the ridge of a roof; a plurality of vent extension members extending down from the base portion, the vent extension members forming vent passages to vent air exiting the vent opening and direct the air beneath and out of the sides of the vent, the vent extension members set at an angle to the longitudinal direction of the vent; and generally V-shaped filter members attached to said vent with the small end of the V adjacent said base portion.

Abstract: A heat exchange device including a flexible hinge, a solar collector, a tank containing serpentine or coiled tubes which contain municipal water, wherein the tank contains thermal transmission vents designed for outflow of hot gasses from an attic, an insect screen, a precipitation drain and an attachment area is hereby disclosed.

Abstract: A construction system for releasing moisture from a building is provided. The system is especially suitable for use in buildings having a hip, valley or gable roof. More specifically, the device gives the hip, valley or gable roof adequate ventilation and moisture vapor release portals so as to allow air and water vapor to properly rise through the interior of the hip, valley or gable roof and out through ridge vents without becoming trapped by rafters of the hip, valley or gable roof. The system has a first unit and a second unit, wherein the first unit allows air and water vapor to pass through passageways of the first unit up through the underside of the hip, valley or gable roof up and out through the ridge vent(s) and the second unit allows air from the exterior to pass into the roof cavity to circulate through the roof cavity and into the first unit.

Abstract: A ridge vent has an elongated body, a plurality of ventilation slots, and a separation line that permits easy separation of an outer edge portion of the elongated body. Each of a first set of holes adjacent the separation line has a downwardly extending cylindrical body. Each of a second set of holes adjacent the separation line has a mating cylindrical body adapted to engage and nest within the downwardly extending cylindrical body of one of the second set of holes. Moreover, a width of the ridge vent may be reduced by separating the outer edge portion from the elongated body, overlapping it with the elongated body, and engaging the mating cylindrical bodies with the downwardly extending cylindrical bodies.

Abstract: Roof ridge vent system adapted for housing a plurality of fans in a central airflow channel positioned directly over the opening in a ridge portion of a roof for ventilating a plurality of vent chutes or attic space comprising: a hood member engaged with outer edge portions of vent members having air-passageway holes defined therein and inner edge portions preferably being hinged respectively to inner edge portions of base members so as to be adapted for installation on variously-pitched roofs, each base member also having outer edge portions defining a wall adapted for blocking wind from being blown into the vent and for causing airflow over the top of the vent to encourage airflow through the vent system. Vent member sections may be installed end-to-end to define an elongated airflow channel adapted for ventilating with or without assistance from the fans.