An air purification plant has a partition for spatially separating a contaminated air chamber arranged upstream from a clean air chamber downstream, the partition including a support frame and multiple filter boxes projecting from the support frame, the filter boxes having at least one filter box wall which extends from the support frame into the contaminated air chamber. The filter boxes are each open into the clean air chamber arranged downstream, wherein filter box walls, facing toward one another, of adjacent filter boxes form in each case one filter pocket which is open at the upstream side and preferably at the top and/or bottom, and a suction nozzle is movable from one filter pocket into an adjacent filter pocket. At the downstream side, each filter pocket has a pocket base portion which is at least approximately impermeable to air and has a smooth surface on the contaminated air side.

An adjustable filter assembly for a heating, ventilation, and/or air conditioning (HVAC) system includes a first filter retainer configured to capture a first filter and a second filter retainer configured to capture a second filter. The adjustable filter assembly also includes a hinge coupled between first filter retainer and the second filter retainer and about which the first filter retainer and the second filter retainer are configured to rotate to position the first filter and the second filter at an angle relative to one another in a first angled operating configuration and to align the first filter and the second filter with one another in a second angled operating configuration.

A V-bank filter apparatus and method for air filtration. The V-bank filter may include varying the downstream regions between adjacent V shaped filter elements. The V-bank filter may include a housing with one or more structural supports. The structural supports of the filter housing may include one or more through openings. The filter media elements may include one or more hinges and/or flaps.

A cassette filter including a plurality of filter media packs, a frame for receiving the filter media packs, and protective grids. Two filter media packs in each case are arranged in a v-shape, and a gas flows through the filter media packs from a dirty gas side of the filter to a clean gas side of the filter in order to clean the gas. A respective protective grid of the protective grids is arranged on each filter media pack on the clean gas side. The protective grids have a grid structure with substantially closed curves of different sizes arranged centrically around at least one centre of the protective grid and with a plurality of connectors, which are oriented radially with respect to the centre of the protective grid and connect the closed curves to one another.

A cassette filter including a plurality of filter media packs, a frame for receiving the filter media packs, and protective grids. Two filter media packs in each case are arranged in a v-shape, and a gas flows through the filter media packs from a dirty gas side of the filter to a clean gas side of the filter in order to clean the gas. A respective protective grid of the protective grids is arranged on each filter media pack on the clean gas side. The protective grids have a grid structure with substantially closed curves of different sizes arranged centrically around at least one centre of the protective grid and with a plurality of connectors, which are oriented radially with respect to the centre of the protective grid and connect the closed curves to one another.

A cartridge filter including a plurality of filter media sets, wherein two of the plurality of filter media sets are arranged in a V-shaped manner, and a frame for receiving the filter media sets. The frame is formed by four elements which are each configured in one piece: an inflow-side upper plate, an outflow-side base plate and two side plates.

A cartridge filter including a plurality of filter media sets, wherein two of the plurality of filter media sets are arranged in a V-shaped manner, and a frame for receiving the filter media sets. The frame is formed by four elements which are each configured in one piece: an inflow-side upper plate, an outflow-side base plate and two side plates.

A cassette filter including a plurality of filter media packs and a frame for receiving the filter media packs. In each case, two filter media packs are arranged in a v-shaped manner. The frame possesses an inflow-side head plate, an outflow-side foot plate and two side plates. The head plate and/or the foot plate and/or the side plates have a flow-optimized shaping.

A cassette filter including a plurality of filter media packs and a frame for receiving the filter media packs. In each case, two filter media packs are arranged in a v-shaped manner. The frame possesses an inflow-side head plate, an outflow-side foot plate and two side plates. The head plate and/or the foot plate and/or the side plates have a flow-optimized shaping.

A filter element includes a folded filter medium. The filter medium includes two longitudinal edges and transverse edges, and a first fold. The first fold is a zigzag-shaped parallel fold in such a way that folded edges of a first type extend parallel to the transverse edges of the filter medium and folded sections of a first type are formed between fold peaks and fold troughs. The filter medium is provided with at least one second fold as a counter-fold. A folded edge of a second type is present in each folded section of a first type. Each folded edge of a second type is oriented at an obtuse angle to the folded edge of a first type in the fold trough such that triangular folded sections of a second type are formed.