A fume hood comprising: a hood, a work chamber, and a front wall formed with an opening toward an indoor environment; an air supply system, and an air exhaust system to discharge air that enters the work chamber through a front opening and enters the work chamber through the air supply system, out from the work chamber; the air supply system provided with at least one air supply outlet in an upper portion and a lower portion of the hood, and the air supply outlet supplying air towards the work chamber. The fume hood can reduce energy consumption of air conditioning and suppress overflowing of harmful substances in the work chamber, with a low installation cost and a high consistency of product quality.

An enclosure for using a tile saw is described. The enclosure comprises a rectangular tray having a front, a rear, and two side walls and a bottom surface wherein the bottom surface is inclined from a first height adjacent to the front wall to a second height adjacent to the rear wall wherein the second height is lower with respect to top surfaces of the front, rear, and side walls than the first height wherein the tray is configured to have a tile saw used therein. Two side panels, a rear panel, and a top panel are configured to be joined together to form a waterproof box on three sides and top of the tray so that water used to cool a tile saw blade is not sprayed outside of the waterproof box.

An enclosure for using a tile saw is described. The enclosure comprises a rectangular tray having a front, a rear, and two side walls and a bottom surface wherein the bottom surface is inclined from a first height adjacent to the front wall to a second height adjacent to the rear wall wherein the second height is lower with respect to top surfaces of the front, rear, and side walls than the first height wherein the tray is configured to have a tile saw used therein. Two side panels, a rear panel, and a top panel are configured to be joined together to form a waterproof box on three sides and top of the tray so that water used to cool a tile saw blade is not sprayed outside of the waterproof box.

Apparatus and associated methods relate to a rapid repositionable construction shelf. In an illustrative example, a repositionable construction shelf may, for example, extend along a longitudinal direction with intersecting opposing protrusions. The opposing protrusions may advantageously be configured such that the opposing protrusions may releasably couple the opposing arms to at least one adjacent vertical construction beam. The opposing protrusions may, for example, be positioned such that a distal protrusion is higher than a proximal protrusion such that the weight of the shelf urges both protrusions to frictionally engage with the vertical construction beam.

Apparatus and associated methods relate to a rapid repositionable construction shelf. In an illustrative example, a repositionable construction shelf may, for example, extend along a longitudinal direction with intersecting opposing protrusions. The opposing protrusions may advantageously be configured such that the opposing protrusions may releasably couple the opposing arms to at least one adjacent vertical construction beam. The opposing protrusions may, for example, be positioned such that a distal protrusion is higher than a proximal protrusion such that the weight of the shelf urges both protrusions to frictionally engage with the vertical construction beam.

Provided is a safety cabinet that, when multiple different kinds of pathogens or the like are handled in the same safety cabinet, can prevent previously-handled pathogens or the like from being commingled with pathogens or the like to be subsequently handled after cleaning and disinfection. The safety cabinet includes a work opening in the front face of a work space and supplies clean air to the work space from above, wherein the safety cabinet is provided with the following: a rear air inlet formed in the back surface lower part or in the bottom rear side of the work space; a front air inlet formed in the bottom front side of the work space; and a work table air inlet formed in a work surface, between the rear air inlet and the front air inlet, and parallel to the front air inlet and/or the rear air inlet.

The present invention relates to an apparatus for assisting with the quick and accurate cutting of a piece of wall board or the like for installation. When installing wall board, it is important that it fits tightly to the ceiling or wall against which the wall board is being installed. The invention generally includes a frame on which a piece of dry wall can be placed and at least one cutting template that comprises a first cutting guide disposed within a first cutting slot that is carried by the frame. The first cutting slot and first cutting guide define a first cutting channel that is adapted to receive a cutting tool and to guide the cutting tool along the first cutting guide so that the dry wall can be cut to match the pattern of the cutting guide.

A safety cabinet has a second operation chamber in a first operation chamber and into which clean air is supplied, a second suction opening for sucking in air in the second operation chamber and a portion of the air in the first operation chamber, and a second operation opening part that is provided facing a first operation opening part and communicates the second operation chamber with the first operation chamber. Airflow containment (air barrier) is doubled with respect to the outside of a safety cabinet. In cases where decontamination and disinfection operations are carried out according to the changeover procedures, intensive decontamination and disinfection of the second operation chamber is sufficient, and decontamination and disinfection of the first operation chamber is hardly required. Decontamination and disinfection operations in the changeover procedures and the like can be carried out in a greatly reduced time.

A safety cabinet has a second operation chamber in a first operation chamber and into which clean air is supplied, a second suction opening for sucking in air in the second operation chamber and a portion of the air in the first operation chamber, and a second operation opening part that is provided facing a first operation opening part and communicates the second operation chamber with the first operation chamber. Airflow containment (air barrier) is doubled with respect to the outside of a safety cabinet. In cases where decontamination and disinfection operations are carried out according to the changeover procedures, intensive decontamination and disinfection of the second operation chamber is sufficient, and decontamination and disinfection of the first operation chamber is hardly required. Decontamination and disinfection operations in the changeover procedures and the like can be carried out in a greatly reduced time.

An open fume capture and exhaust work station for a laboratory classroom having an air exhaust system that provides unobstructed sight lines for students at the station of the other students and of a classroom instructor. The work station includes an upper table surface providing a plurality of individual work surfaces, a fume extractor extending upwardly from a middle portion of the table surface to an elevation below the student sight lines, a pair of elongated air outlet openings adjacent to opposed sides of the table for directing fan generated opposed airflows to the extractor which defines opposed upstanding air inlet faces and communicates those faces with the air exhaust system creating a pressure drop within the extractor that captures the opposed inwardly airflows and pull the airflows over the individual work surfaces and into said extractor, capturing and removing emissions from spills and experiments on those work surfaces.