Abstract: A rain water filter is disclosed. The rain water filter includes a horizontal inlet and a horizontally arranged residual water outlet which are slightly offset in relation to each other. A pipe with a longitudinal slot connects to the inlet and the pipe leads into the residual water outlet. An adhesive filter which is in the form of a tunnel-shaped half-shell is arranged below the longitudinal slot, where the lateral walls are the filter surfaces of the filter. Due to the adhesion effect, the water which flows past is suctioned inwards where it passes through the longitudinal opening into a tank and from there, for example, into a cistern via a filter water outlet. The water running off from the side walls is collected on the base of the hollow cylinder and from there is guided to the residual water outlet.

Abstract: A rain water filter is disclosed. The rain water filter includes a horizontal inlet and a horizontally arranged residual water outlet which are slightly offset in relation to each other. A pipe with a longitudinal slot connects to the inlet and the pipe leads into the residual water outlet. An adhesive filter which is in the form of a tunnel-shaped half-shell is arranged below the longitudinal slot, where the lateral walls are the filter surfaces of the filter. Due to the adhesion effect, the water which flows past is suctioned inwards where it passes through the longitudinal opening into a tank and from there, for example, into a cistern via a filter water outlet. The water running off from the side walls is collected on the base of the hollow cylinder and from there is guided to the residual water outlet.

Abstract: An energy conversion device includes a multi-step holographic optical element arranged between a transparent cover and a first solar cell. The multi-step holographic optical element is configured to concentrate a portion of a first component of impinging electromagnetic radiation onto the first solar cell. The solar cell is configured to convert the first component of impinging electromagnetic radiation into electrical energy.

Abstract: An energy conversion device includes a holographic lens arranged between a glass slab and the first solar cell. The holographic lens is configured to concentrate a portion of a first component of impinging electromagnetic radiation onto the first solar cell and direct a portion of a second component of the electromagnetic radiation away from the first solar cell. The first solar cell is a back contact solar cell configured to convert the first component of the electromagnetic radiation into electrical energy.

Abstract: A single-lens solar module includes solar cells that convert solar radiation into electrical energy, a glass slab, and a single-layer holographic lens formed directly on the glass slab and separated by a distance from the solar cells. The lens is adapted to selectively deflect a first light component comprising visible light and excluding non-visible light, and to concentrate the first component of light onto the solar cells.

Abstract: Conversion of a ventilated roof to a thermally insulated, nonventilated roof without tearing off an existing roof sheathing which is, for example, made of asbestos cement and is carried by roof beams, includes the provision of holes in the old roof sheathing over the length of each roof beam at approximately equal intervals; and the provision of posts which are secured on the roof beams, extend through the holes, and project above the old roof sheathing. A heat-insulating intermediate structure is secured on the posts, has a U-shaped or hat-shaped profile, and extends over the posts which are arranged in a row, on which U-shaped or hat-shaped profile is secured the new roof sheathing. The space between the old and new roof sheathings is filled with an insulating layer.