Abstract: A computer implemented method of operating an air cleaning cluster (20, 20?) comprising a plurality of air cleaning devices (10, 10.1-10.n) interconnected to each other by a volume of air (100), each air cleaning device (10, 10.1-10.n) being configured to remove contaminants from the volume of air (100), the method comprising: receiving, by control device(s) (30, 30?, 30? 30.1-30.n) from air quality data sources, data indicative of air quality within the volume of air (100); receiving, by the control device(s) (30, 30?, 30? 30.1-30.n), data indicative of operational state(s) of the air cleaning devices (10, 10.1-10.n); and the control device(s) (30, 30?, 30? 30.1-30.n) controlling the air cleaning device(s) (10, 10.1-10.n) of the air cleaning cluster (20, 20?) such as to influence the indoor air quality within the volume of air (100), using the data indicative of the indoor air quality and the data indicative of an operational state of the plurality of air cleaning devices (10, 10.1-10.n).

Abstract: An air filter arrangement (A) includes at least two frames removably attached to each other, each one of the at least two frames delimiting one of at least two spaces/volumes (V1, V2, V3) and all of the at least two frames together defining an air flow path (V1-V2-V3) passing through each one of the at least two adjacent/contiguous spaces/volumes (V1, V2, V3), wherein the space/volume (V1, V2, V3) of one frame of the at least two frames includes a first air filter (F1), the space/volume (V1, V2, V3) of another frame of the at least two frames includes a second air filter (F2), and the space/volume (V1, V2, V3) of one frame of the at least two frames includes an air moving unit (M1). A combined air filter arrangement (CA) may include at least two such air filter arrangements.

Abstract: a plurality of first flow ducts and a plurality of second flow ducts adjacent to the plurality of first flow ducts for exchanging heat energy between first flows passing through the plurality of first flow ducts and second flows passing through the plurality of second flow ducts; • a parallel flow region where flow passages and directions of the first flows of the plurality of first flow ducts and adjacent flow passages and directions of the second flows of the plurality of second flow ducts are arranged in locally or tangentially parallel relationship with respect to each other at least in a portion of the parallel flow region and are fluidly separated by wall portions from each other; • wherein a cross section of the wall portions of the parallel flow region orthogonal to a local flow passage direction of the parallel flow region is a grid-like pattern.

Abstract: A centrifugal fan arrangement includes a centrifugal fan rotatably mounted within a scroll housing and a plurality of circumferentially spaced fan blades fixed to a central fan axle extending along an axial direction and/or to a circumferential fan ring extending in a plane orthogonal to an axial direction. The scroll housing includes a housing main portion with a maximum housing diameter D and a maximum axial housing width H, a housing inlet portion and a housing outlet portion, said housing main portion surrounding said centrifugal fan at radially outer locations to define a circumferentially extending air guiding space. The housing inlet portion is located at radially inner locations to define an inner air inlet space. The housing outlet portion is located at a radially outer location to define an air outlet space.

Abstract: The present invention provides enthalpy exchanger elements (E, E?) and enthalpy exchangers comprising such elements. Furthermore, the invention discloses a method for producing such enthalpy exchanger elements and enthalpy exchangers, comprising the steps of a) providing an air-permeable sheet element (1); b) laminating at least one side (1a, 1b) of the sheet element (1) with a thin polymer film (3, 4) with water vapor transmission characteristics; and c) forming the laminated sheet element (1) into a desired shape exhibiting a three-dimensional corrugation pattern (5, 5, . . . ).

Abstract: The invention relates to a ventilation unit (1) for providing supply air (SA), preferably outside air (OA) or fresh air, to an apartment or parts thereof and for removing return air (RA), preferably exhaust air (EA) or used air, from said apartment or parts thereof. The ventilation unit comprises a bypass valve (BV; BV?) having a plurality of elongate members (EM; EM?) extending across a bypass duct and arranged in parallel next to each other, thus forming an arrangement of a plurality of elongate members next to each other as a one-elongate-member-thick layer. At least some elongate members (EM; EM?) of said plurality of elongate members (EM; EM?) are rotatably mounted around an axis of rotation (AR) parallel or identical to a longitudinal axis (LA) of said elongate members (EM; EM?). At least some elongate members (EM; EM?) are rotatable between a first rotational position or closed position (CP) and a second rotational position or open position (OP).

Abstract: A heat recovery unit with a unit housing (11) defining a unit compartment, a heat exchanger (20), a fresh air bypass flow passage and/or an exhaust air bypass flow passage, a fresh air centrifugal fan arrangement (41) and an exhaust air centrifugal fan arrangement (42), a fresh air filter (51) and an exhaust air filter (52).

Abstract: The invention relates to an air filter assembly (1) for a heat recovery ventilation unit. The air filter assembly comprises a frame (2) and a filtering element (3) fixed within said frame (2). The frame (2) comprises a first frame portion (2a) having a first height; a second frame portion (2b) opposite said first frame portion (2a) and having a second height; a third frame portion (2c); and a fourth frame portion (2d) opposite said third frame portion (2c). The third and fourth frame portions (2c, 2d) each extend between said first and second frame portions (2a, 2b). The second height is greater than the first height of said first frame portion. A height of said third frame portion (2c) is comprised between said first and second heights; and a height of said fourth frame portion (2d) is comprised between said first and second heights.

Abstract: The invention relates to a channel element for a ventilation system. The channel element has a first opening (O1), a second opening (O2), and a channel wall which extends between the openings and surrounds a channel section. The channel element has a tubular section (25) and a thermally insulating envelope section (20) which is paired with the tubular section and envelopes same at least in sub-regions. The invention further relates to a channel element system made of individual channel elements which are connected together in series and a building envelope which contains such a channel element system.

Abstract: The invention relates to an exchanger arrangement (3) for the heat transfer and/or selective material transfer between a first fluid (F1) and a second fluid (F2), which can flow through the arrangement (3), said arrangement (2) being constituted of a multitude (n) of adjacent local exchanger elements (E1, E2, . . . , En). The exchanger arrangement (3) has at least in some sections a cylindrical shape or the shape of a segment thereof or a prismatic shape having a polygonal base or the shape of a segment thereof. The adjacent local exchanger elements (E1, E2, . . . , En) are flat structures that are either wedge-shaped or sheet-like.

Abstract: The present invention provides enthalpy exchanger elements (E, E?, PR, PF) and enthalpy exchangers comprising such elements. Furthermore, the invention discloses a method for producing such enthalpy exchanger elements and enthalpy exchangers, comprising the steps of a) providing an air-permeable sheet element (1); b) laminating at least one side (1a, 1b) of the sheet element (1) with a thin polymer film (3, 4) with water vapor transmission characteristics; and c) forming the laminated sheet element (1) into a desired shape exhibiting a three-dimensional corrugation pattern (5, 5, . . . ).

Abstract: The present invention provides enthalpy exchanger elements (E, E?) and enthalpy exchangers comprising such elements. Furthermore, the invention discloses a method for producing such enthalpy exchanger elements and enthalpy exchangers, comprising the steps of a) providing an air-permeable sheet element (1); b) laminating at least one side (1a, 1b) of the sheet element (1) with a thin polymer film (3, 4) with water vapor transmission characteristics; and c) forming the laminated sheet element (1) into a desired shape exhibiting a three-dimensional corrugation pattern (5, 5, . . . ).

Abstract: The invention relates to a heat exchanger block 2 and to a heat recovery ventilation unit 1 comprising such a heat exchanger block. In the heat exchanger block 2, the individual flow cross-section (Q1) of flow passages of said plurality of first air flow passages (AFP1) in said parallel flow region (PF) and the individual flow cross-section (Q2) of flow passages of said plurality of second air flow passages (AFP2) in said parallel flow region (PF) gradually, preferably linearly, decrease along a straight line (x-x) perpendicular to the parallel air flow passages (AFP1 and AFP2) and from said first wall (W1) to said second wall (W2) of the block.

Abstract: The present invention provides a heat exchanger, comprising a plurality of first heat exchange plates (1) and second heat exchange plates (2) that are connected sequentially and at an interval; the first heat exchange plates (1) and the second heat exchange plates (2) each comprise a heat exchange sheet (3) and a heat exchange frame (4) disposed on side ends of the heat exchange sheet (3); the side ends of the heat exchange sheet (3) are formed with a snap projection (9) in a direction away from the heat exchange frame (4); the heat exchange frame (4) is formed with a snap groove (10); the first heat exchange plates (1) and the second heat exchange plates (2) are in interference connection through the engagement between the snap projection (9) and the snap groove (10); an air channel (5, 6) is formed between a first heat exchange plate (1) and an adjacent second heat exchange plate (2), the air inlet of the first heat exchange plate (1) and the air inlet of the second heat exchange plate (2) have different di

Abstract: The invention relates to a system and method for fastening a heating/cooling element (3) to a wall or to a floor, the method comprising the following steps: a) fastening at least two brackets (1, 2) to a wall (W) and/or to a floor (B), the longitudinal axis (L) of each bracket (1, 2) being vertically oriented and the two brackets (1, 2) being spaced apart from one another in the horizontal direction; b) bringing a first (lower) edge formation of the heating/cooling element into engagement with the complementary first bracket formation (F1) of the particular bracket (1, 2), so that a pivoting engagement between the heating/cooling element (3) and the brackets (1, 2) is established; c) pivoting the heating/cooling element (3) with respect to the two brackets (1, 2) about a pivot axis (R), a second (upper) edge formation of the heating/cooling element being swiveled toward the second bracket formation (F2) of the particular bracket (1, 2); and d) bringing the second (upper) edge formation of the heating/cooling

Abstract: The present invention provides a heat exchanger, comprising a plurality of first heat exchange plates (1) and second heat exchange plates (2) that are connected sequentially and at an interval; the first heat exchange plates (1) and the second heat exchange plates (2) each comprise a heat exchange sheet (3) and a heat exchange frame (4) disposed on side ends of the heat exchange sheet (3); the side ends of the heat exchange sheet (3) are formed with a snap projection (9) in a direction away from the heat exchange frame (4); the heat exchange frame (4) is formed with a snap groove (10); the first heat exchange plates (1) and the second heat exchange plates (2) are in interference connection through the engagement between the snap projection (9) and the snap groove (10); an air channel (5, 6) is formed between a first heat exchange plate (1) and an adjacent second heat exchange plate (2), the air inlet of the first heat exchange plate (1) and the air inlet of the second heat exchange plate (2) have different di