Air cleaning device

An air filter arrangement (A) comprising:

• a. at least two frames (1, 2, 3) removably attached to each other, each one of the at least two frames (1, 2, 3) delimiting one of at least two spaces/volumes (V1, V2, V3) and all of the at least two frames (1, 2, 3) 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
• b. the space/volume (V1, V2, V3) of one frame (1, 2, 3) of the at least two frames (1, 2, 3) comprises an air filter (F1) and the space/volume (V1, V2, V3) of one frame (1, 2, 3) of the at least two frames (1, 2, 3) comprises an air moving unit (M1).

The air filter arrangement (A) according to claim 46, comprising four frames (1, 2, 3, 4), each one of the four frames (1, 2, 3, 4) delimiting a space/volume (V1, V2, V3, V4) together defining an air flow path (V1-V2-V3-V4), one of the four frames comprising a first air filter (F1), one of the four frames comprising a second air filter (F2), one of the four frames comprising a third air filter (F3), and one of the four frames comprising an air moving unit (M1).