Abstract: A cooling system including redundant fan controllers. The cooling system includes a first fan controller coupled to control a first plurality of fans and a second fan controller coupled to control a second plurality of fans. During operation, the first plurality of fans and the second plurality of fans operate concurrently. The first fan controller and the second fan controller are each configured to monitor the first and the second plurality of fans and to detect a failure in any of the first and the second plurality of fans. Further, in response to detecting a failure of a fan of the first plurality of fans, the second fan controller is configured to increase an operating speed of a corresponding fan of the second plurality of fans.

Abstract: Air deflector for deflecting an air flow from an air register including a pair of mounting members adapted to be mounted on opposite sides of a venting member of the air register device and a laterally expandable guide member arranged between the mounting members. The guide member is expandable to different lengths to thereby enable the length between the mounting members to vary and allow the air deflector to be used for different sized air registers. The guide member is pivotally connected to the mounting members and pivotable into different angular positions relative to the mounting members to thereby enable the air flow to be deflected into different directions depending on the angular position of the guide member.

Abstract: A buffering member is connected between a cushion member and an air discharge duct of a blower unit to damp vibrations of the blower unit and thus to limit conduction of the vibrations from the blower unit to the cushion member. Resilient damper members are held between a connector bracket and a cover member and hold seat spring members, so that the blower unit is supported by the seat spring member. The connector bracket includes protrusions, which protrude toward the cushion member and hold the seat spring members through the resilient damper members. The cushion member includes recesses, which receive the protrusions of the connector bracket in such a manner that the protrusions are spaced from the cushion member.

Abstract: A cap for a flue opening of a chimney in order to enhance draw of smoke and in order to protect from entry of animals and debris. The device includes sidewalls fabricated from flat sheet metal and a top attached to the sidewalls from fasteners. A plurality of louver openings are provided in the sidewalls in order to draw air. A plurality of exit vent openings in the sidewalls above the louver openings are at least equal to a cross-sectional area of the flue opening. An inner frame and mounting assembly includes a mechanism to both anchor the device to the chimney flue and to level the device.

Abstract: A fan unit being suspended from a building floor structure within a crawl space. The fan unit includes a fan, a fan motor, an inlet grill, a discharge plenum and an outlet grill. A timer connected in the power supply activates the fan motor at periodic predetermined time intervals to move the crawl space air through the fan unit. The fan unit is located and orientated to create a negative pressure to pull air into the crawl space through wall inlet grills and to also create a positive pressure to force air out of the crawl space through wall outlet grills. An outside humidity sensor can be used to insure the outside air has a lower percent humidity than that desired in the crawl space and an inside humidity sensor is used to turn the fan unit off if the crawl space humidity is below an acceptable limit.

Abstract: A chimney cap and a method for making the same are described. The chimney cap is more consistently and uniformly manufactured, which permits nesting. This is accomplished by forming the cap from single piece of expanded metal to create a substantially square or rectangular cage where each side of the cage has an integral flange that is bent substantially perpendicular to its respective side. The substantially square or rectangular cage is stretched to form a shaped trapezoidal cage, with a top portion of each side of the cage having a longer span that a bottom of portion of each side.

Abstract: A method of selecting a ventilation control strategy from among a plurality of ventilation control strategies. The method comprises the steps of: determining if a CO2 signal is present and valid; selecting a CO2 based ventilation control strategy if the CO2 signal is present and valid; selecting a second ventilation control strategy if the CO2 signal is not present or is invalid; and operating using the selected strategy. The selection step occurs in a zone controller.

Abstract: A register system for air flow regulation, directing, damping and filtering attachable to individual building air supply outlets said as typically found in building rooms wherein air flow from a central air supply enters a room of the building through a duct in a partition of the room. The system is particularly useful for persons said as asthmatics who require additional room air filtering and special needs relating to air damping and airflow. Many of these persons find direct airflow on their person to be irritating. The present invention allows for said persons to directly (or through the use of an extendable pole) re-direct one or more individual air deflectors to aim the air in almost any direction. Furthermore, said persons may directly (or through the use of an extendable pole) adjust individual dampers in each air deflector for adjusting the air volume.

Abstract: An air passage switching device for a vehicle air conditioner includes first and second openings and a rotary door for opening and closing the first and second openings. A rib having a first middle seal surface and a rib having a second middle seal surface are provided in a case to protrude an inner side and to be separated by a predetermined angle in a rotation direction of the rotary door. Further, the rotary door has a door structure angle that is larger than a door operating angle. In addition, the first and second middle seal surfaces and first and second end seal surfaces are provided in the case so that the predetermined angle is a difference between the door structure angle and the door operating angle. Accordingly, arrangement positions of the first and second openings can be readily set without increasing a door operating amount.

Abstract: A register opening cover may be used to cover register openings until the register boot is installed in the register opening. During the installation of the register boot, the invention may be used to hold the register boot in place until the register boot is securely connected to the floor. After the register boot is installed, the cover forms an insulator around the register boot. One embodiment of the invention provides a register opening cover and register boot frame that can be configured to fit register boots of different sizes. Another embodiment of the invention provides a register opening cover that will support some of the weight of a worker who may step on the covered register opening.

Abstract: An explosion protection venting system has a plurality of vessels or reactors connected by a common vent line. A flame front diverter having a pair of opposing rupturable discs is connected to each one of a plurality of vessels for directing a deflagration away from the normal flow path and through an alternate path that prevents damage to nearby structure.

Abstract: A profiled ridge vent for tile roofs is provided having a vent strip located on each side of a roof ridge. Each vent strip includes a vent material, formed from a non-woven mat, including a first surface, contoured to a profile to match a profile 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. A water dam is attached to the first surface and extends in an up-slope direction toward the roof ridge. In use, a first vent strip is located on a first side of a roof ridge pole, and a second vent strip is located on a second side of the roof ridge pole. The upper water barriers of the first and second vent strips overlap one another at the ridge pole. Preferably, adhesive is provided on at least one of the upper water barriers so that the two water barriers are connected together. Alternatively, a single water barrier is provided which bridges the ridge pole and joins the first and second vent strips.

Abstract: An air-guiding appliance (10) for the directionally defined introduction of air supplied on the rear side of the appliance into a space (22), in particular interior of a vehicle, having a housing (26), an air-guiding guiding device (12) which has recesses on the front side and by means of which the direction of the air flowing out into the space (22) can be defined, means (16) for setting the direction of the air-guiding device (12) and, if appropriate, means for setting the quantity of air flowing into the space, an air-guiding body (30) or an air-guiding plate which has through-going recesses (32) which correspond with the front-side recesses and the air-charged rear side, the air-guiding body (30) or the air-guiding plate consisting of elastically deformable material, there being means (40.1, 40.2) for displacing the rear side of the air-guiding body (30)/air-guiding plate with respect to the fixed front side of the air-guiding body (30)/air-guiding plate, or vice versa, the displacement means (40.1, 40.

Abstract: Heating, ventilation and air conditioning systems for busses having air distribution at the front of the bus through a distribution system integrated with the dashboard and outlet vents shaped and oriented to provide clearing of mist and frost from vehicle windows, particularly those in and around an entry to the vehicle. A dedicated blower for an entry way door is provided.

Abstract: A sealed electronic equipment enclosure with a dedicated cooling system is fitted with movable louvers in the enclosure walls. During normal operation, air pressure developed by the dedicated cooling system keeps the louvers closed and maintains the enclosure sealed to the computer room environment. If the dedicated cooling system fails, the internal air pressure developed by the cooling system is reduced and air movers in the electronic equipment force the louvers open, thereby allowing the air movers to draw cooled air from the computer room into the enclosure. This cooled air prevents the equipment from overheating at least for a time period long enough to allow the dedicated cooling system to be replaced or repaired.

Abstract: A dwelling eaves vent apparatus having a diameter-increasing passageway component to compensate for the impediment to flow unavoidably caused by a screen over the outlet to atmosphere of the component, and wherein the component is characterized by being embodied with a conical shape which maintains directional guidance to discharging air/gas content to thereby contribute to obviating turbulence during discharge through the screen.

Abstract: A fume hood exhaust stack system (10) and method utilize a variable speed fan (24) and an exhaust stack (28) having an adjustable cross-sectional area. Toxic exhaust from one or more fume hoods (12) is conveyed through a header (16) to the fan. The fan forces the exhaust through the exhaust stack, and the exhaust is then discharged into the atmosphere at a sufficient velocity and momentum to ensure that the exhaust reaches an environmentally sound altitude. A variable speed drive (36), programmable controller (34), flow signals (26), and static pressure and total pressure signals (20) are utilized to modulate the speed of the fan and the area of the exhaust stack to maintain the desired fan inlet pressure and exhaust velocity.

Abstract: A dust extraction shroud for a drill, which surrounds a drill bit and which lies adjacent the work surface, comprises a body portion defining a first inlet adapted to engage the work surface and to surround the location at which said bit penetrates the surface. The shroud body further defines a first outlet connected to a source of suction and a third inlet for allowing the bit to pass through said body portion. A first sealing means is arranged in said third inlet for surrounding said bit and resisting the flow of air. Wherein said body portion includes at least one protruding portion defining a second inlet between said protruding portion and an adjacent part of said body, and on a side of said protruding portion remote from the first inlet. The second inlet admits air to enter said body portion and travel to the first outlet.

Abstract: In a dentist's surgery, a treatment room, and premises where different chemicals are handled or where welding or soldering is performed there are a number of pollutants. In accordance with the invention, these pollutants are removed by an endless air-jet circuit (5), which during its course passes a treatment locus as well as a filter.

Abstract: The invention relates to a barrier apparatus for resisting passage of harmful gases from a space through a substantially vertical opening having a top, a bottom and lateral sides, the barrier apparatus comprising a suction arrangement for sucking gases and blowing arrangement for creating a flow of a medium.