Abstract: A vent apparatus for cooperating with duct work associated with an exhaust fan to enable air to be exhausted from an interior room of a dwelling to the exterior environment. The vent apparatus includes a base member and a cover member releasably securable to the base member. The base member includes an attaching portion having a plurality of locking portions, while the cover member includes a plurality of flexible latching arm members which releasably engage the locking portions when the cover member is placed over the attaching portion. The attaching portion includes an enlarged opening which enables air exhausted from an interior room to be directed out between the base and cover members to the exterior atmosphere. The apparatus is particularly well-adapted to be used with vinyl or aluminum siding and is relatively inexpensive to construct, light-weight and easy to install. In an alternative embodiment, the apparatus includes a screen adapted to be secured to the base member.

Abstract: A system of casino tobacco smoke elimination based around a series of slot-like air intakes in which slot length is at least twice as great as slot height. In a preferred embodiment air velocity measured at the slot mouth should be about 1300 feet per minute, and a properly operating slot intake should provide a critical air capture velocity of about 50 feet per minute measured six inches from the slot mouth. A screen is preferably placed over the intake vents to prevent unwanted items from being pulled into the system. The suction system powering the slot-like intakes can end in a fan/filter unit that removes smoke pollutants and returns the cleaned air to the room, or the smoke laden air may be exhausted to the outside by the buildings air conditioning-ventilation system which also provides conditioned fresh air to replace the exhausted smoke.

Abstract: Air flow in a hollow wall, ceiling, or floor is created by forcing air into or drawing air out of the wall, ceiling, or floor through a hole around a pipe through which the pipe extends from the wall, ceiling, or floor. The apparatus of the invention includes a body that fits around the pipe to position an end against the wall, ceiling, or floor surrounding the pipe and hole and provides for the connection of an air flow hose thereto. The air flow hose provides a source of pressurized air or a source of vacuum to force air into the wall, ceiling, or floor or draw air therefrom.

Abstract: The apparatus can distribute and collect air. As a collector, a fan draws air from the proximal end of an elongated tube disposed in an air-environment. The tube is closed at the distal end but receives air all along its length through its air-permeable wall. The wall is more permeable to air at its distal end than at its proximal end. Wall permeability gradually increases from the proximal end to the distal end so that a substantially constant rate of air ingestion occurs at all points along the wall. A reversal of the airflow direction converts the air collector into an air distributor for distributing air evenly along its length.

Abstract: The ventilating fan system comprises an air flow passage including a duct for guiding the air in a room to outside and a ventilating fan arranged in the air flow passage; whereby said ventilating fan is an inversion type ventilating fan, in which opposed rotating blades arranged in a direction perpendicular to flowing direction of the air are rotated in reverse directions, and the ventilating fan is arranged at an end portion of the air flow passage closer to outside and sucks the air in the room and discharges it to outside.

Abstract: A range hood having a sleek, modern appearance has a keypad and control circuit which enable adjustment of fan speed and light intensity. The range hood includes a keypad having a linear array of keys which may be individually or collectively used to energize the fan at one of a variety of speeds. A control circuit responds to depression of one or a group of two of the keys and in response selects one of a plurality of possible fan speeds. The array of keys is also used in conjunction with a separate night light key to program the intensity of the light for use as a night light. An automatic shutoff key is used to gradually reduce the fan speed until, ultimately, the fan is deenergized.

Abstract: A ventilator to be mounted over a square opening in a roof of an establishment producing smoke below. The ventilator has a lower transitional section transforming a square configuration into a round configuration and an upper section in the shape of a cylinder attached to the lower section. The cylinder has an axial force fan mounted therein to create an upwardly moving stream of smoke-laden air therein. The lower section has symmetrically spaced lateral openings in its wall to cause an aspiration of ambient air into the air stream to thereby mix ambient air into the air stream and to thereby reduce the concentration of smoke micro-particles being emitted into the ambient air surrounding the establishment. On top of the cylinder there is provided a self-operating cover to close the ventilator when not in use.

Abstract: An apparatus for removing smoke from an enclosed area. The apparatus comprising an outer column, wherein the outer column is hollow and has a plurality of apertures for receiving the smoke therein. An inner column having cooperative openings and extensions is rotatably mounted inside the outer column for collecting the smoke therein. A fan positioned in the inner column directs the smoke outside through a vent opening. Additionally, a drain is provided for removing moisture from the apparatus.

Abstract: A device for changing air flow from a room has a casing with three openings arranged in a T-shaped disposition. The first and second openings are arranged in a L-shape with respect to a chamber in the casing, and the third opening connects the chamber to an exhaust passage. A flap is provided, with a side end rotatably supported at a corner between the first opening and the second opening such that the flap can be moved between positions for selectively closing the first or second opening by operation of a mechanism for rotating the flap.

Abstract: Air purification or filtration unit having a triangular housing, with the open front face being the hypotenuse of the triangle. The unit is particularly adaptable for use with conventional sized high efficiency particulate air, or HEPA filters and low penetration air, or ULPA filters, to create a highly filtered clean air environment. The unit includes a circulating fan within the housing to draw air through the filters and housing and to exhaust the air through the top housing wall for recirculation, and can also be ducted to exhaust filtered air from the environment, either in whole or in part. A germicidal ultra violet light may be placed within the housing for additional air purification.

Abstract: Testing apparatus and methods are described for determining required vacuum characteristics of a radon evacuation system, wherein the radon evacuation system is of a type which utilizes floor vent holes in a basement floor to evacuate radon from beneath the basement floor. The preferred embodiment comprises an elongated vacuum tube extending from a floor vent hole to a variable vacuum test source. Pressure and air velocity measurement devices are positioned to determine actual static pressure and air flow rate within the vacuum tube. To determine the minimum vacuum required at the floor vent hole, the vacuum test source is adjusted to produce the lowest vacuum which will maintain a negative pressure in nearby test holes. The corresponding static pressure and air flow rate are then noted from the measurement devices.

Abstract: A method of installing a ventilation device through existing plywood door closures of accesses to attic spaces with roof fans in homes includes a frame with louvers across a central opening closed by two doors hingeably attached to be opened and closed with a hook rod interconnecting with eye bolts on the doors, the entire device being insulated to reduce heat loss during the cooler seasons.

Abstract: An apparatus for removing gas from above a floor slab of the interior living space of a structure to the juncture of the floor slab and a foundation wall, down along the foundation wall to and over a footing to below the floor slab. The apparatus includes providing an opening which communicates from the top of the floor slab at the juncture of the floor slab and foundation wall, down along the foundation wall to said footing and extending away from the foundation wall over the footing to at least the distance the footing extends from the foundation wall. Further, this apparatus includes a device for imparting a partial vacuum in the opening to draw gas from above the floor slab to below the floor slab in association with the opening means. In addition a method is provided having the steps of placing an opening between the top of the floor slab to below the floor slab and imparting a partial vacuum to said opening to draw gas from the top of the floor slab to below the floor slab.

Abstract: A quiet fluid passing apparatus comprising a fluid passing rotor comprising open porous structure extending along an annular path, the rotor forming passage means to pass fluid through the rotor open porous structure as the rotor rotates; said path having an inner circumference with diameter ID and an outer circumference with diameter OD, and wherein ##EQU1## The quiet, fluid-passing apparatus may include open porous structure in combination with structures, such as blades and honeycomb material, to form rotors capable of moving fluid in axial or radial directions.

Abstract: A blower system for a duct, locatable anywhere along the duct. The blower system is composed generally of a blower and a housing connected to the blower. The housing encloses the blower and has connected thereto an inlet port and an outlet port for being connected with a duct at any location along the duct. More particularly, the housing includes an internal baffle having a cut-out which interfaces with the outlet of the blower. Further, the housing is provided with an adapter that is tapered between the baffle and the outlet port for facilitating movement of air from the blower to the duct. A power cord emanates sealably from the housing for connecting the blower to a source of electrical power.

Abstract: A method and apparatus for the prevention of migration of hazardous particulate matter from a negative pressure environment established within a building in order to collect and dispose of the hazardous particulate matter, the apparatus and method for the prevention of migration of a hazardous particulate matter from the area being cleaned including an enclosed passageway positioned parallel of the temporary wall means established so as to define the area to be cleaned, the enclosed passageway being continuously evacuated so as to establish a negative pressure in the enclosed passageway which is greater than the negative pressure in the area being cleaned in order to ensure any hazardous particulate matter escaping from the area being cleaned is captured in the enclosed passageway and removed before migrating to other areas of the building in which normal activities are in progress.

Abstract: A below grade heat recovery system discharges air into the drainage system below the floor slab and around the perimeter of a house or building. This air may be warm and moisture laden air ventilated from the building so that a portion of its energy content will be transferred to the surrounding soil, thus raising the soil temperature and reducing below grade heat losses. Pressurization of the sub-soil layer will reduce radon and soil gas transport from the soil, through the floor slab into the basement. Reduced foundation movement will also be reduced by the supply of a relatively constant flow moisture into the soil with the discharged air.

Abstract: A sub-slab depressurization (SSD) radon reduction system uses an existing sub-slab refrigerant line chase as a vent pipe for suction of soil gas from a centrally located sub-slab suction point. A suction pit is excavated proximate the penetration of the slab by the chase, preferably by drilling and removing soil through the chase. The open ends of the chase are sealed with segmented end caps having two tubular sections, one for sealing around the refrigerant lines and the other for connecting externally to a soil gas evacuating air pump and internally to system monitoring instrumentation. A condensate dump assembly is located at the chase exit port.

Abstract: The system for removing the soil gas from the ground surrounding the building structure, includes a clean-out pipe, an air duct system, and a fan. The clean-out pipes are installed inside the building structure, accessible from the ground level and near junctions between the interconnecting pipes and the drain tile. The air duct system is securable to a clean-out pipe, and the fan is installed inside the air duct system. The air duct system is disconnected from the clean-out pipe during the cleaning of the drain tile system. The pressurized fluid projecting through the tip of the rocket nozzle, removes any obstructions in the drain tile, and the pressurized fluid projecting rearward from the nozzle, propels the rocket nozzle through the drain tile system. The air duct system is then connected to the clean-out pipe. The venting of air away from the drain tile system creates a negative pressure, which draws the soil gas into the porous drain tile.

Abstract: The system for removing the soil gas from the ground surrounding the building structure, includes a clean-out receptacle, an air duct system, and a fan. The clean-out pipes are installed inside the building structure, accessible from the ground level and near junctions between the interconnecting pipes and the drain tile. The air duct system is securable to a clean-out receptacle, and the fan is installed inside the air duct. The air duct system is disconnected from the clean-out receptacle during the cleaning of the drain tile system. The pressurized fluid projecting through the tip of the rocket nozzle, removes any obstructions in the drain tile, and the pressurized fluid projecting rearward from the nozzle, propels the rocket nozzle through the drain trail system. The air duct system is then connected to the clean-out pipe.