A system for rearing invertebrates, the system comprising: a plurality of crates arranged into at least one stack, each crate in the stack defining an airflow path there through from an inlet opening in a first wall to an outlet opening in a second wall opposite the first wall; a climate chamber (2, 2a, 2b) comprising: an internal volume enclosed by walls (24, 26), a floor, and a ceiling; a first row of a plurality of air outlets extending in a first direction within the internal volume; a first row of a plurality of air inlets located next to the first row of air outlets, and extending parallel thereto, and spaced apart from the first row of air outlets in a second direction (2 nd), perpendicular to the first direction, at least one first stack of crates arranged in a space between the first row of air outlets and the first row of air inlets; a conduit extending from each of the plurality of air inlets along the first stack of crates, said conduit comprising a plurality of conduit openings configured to align with inlet openings of the plurality of crates in the stack; wherein the crates are arranged with the airflow path oriented perpendicular to the first direction, wherein the plurality of air outlets are arranged along a duct and covered by the duct, and wherein the duct is configured to draw air from the climate chamber (2, 2a, 2b) through the plurality of air outlets via a master outlet in fluid communication with the duct, characterized in that the air inlets and the air outlets are provided in the ceiling of the climate chamber (2, 2a, 2b). a plurality of crates arranged into at least one stack, each crate in the stack defining an airflow path there through from an inlet opening in a first wall to an outlet opening in a second wall opposite the first wall; a climate chamber (2, 2a, 2b) comprising: an internal volume enclosed by walls (24, 26), a floor, and a ceiling; a first row of a plurality of air outlets extending in a first direction within the internal volume; a first row of a plurality of air inlets located next to the first row of air outlets, and extending parallel thereto, and spaced apart from the first row of air outlets in a second direction (2 nd), perpendicular to the first direction, at least one first stack of crates arranged in a space between the first row of air outlets and the first row of air inlets; a conduit extending from each of the plurality of air inlets along the first stack of crates, said conduit comprising a plurality of conduit openings configured to align with inlet openings of the plurality of crates in the stack; an internal volume enclosed by walls (24, 26), a floor, and a ceiling; a first row of a plurality of air outlets extending in a first direction within the internal volume; a first row of a plurality of air inlets located next to the first row of air outlets, and extending parallel thereto, and spaced apart from the first row of air outlets in a second direction (2 nd), perpendicular to the first direction, at least one first stack of crates arranged in a space between the first row of air outlets and the first row of air inlets; a conduit extending from each of the plurality of air inlets along the first stack of crates, said conduit comprising a plurality of conduit openings configured to align with inlet openings of the plurality of crates in the stack; wherein the crates are arranged with the airflow path oriented perpendicular to the first direction, wherein the plurality of air outlets are arranged along a duct and covered by the duct, and wherein the duct is configured to draw air from the climate chamber (2, 2a, 2b) through the plurality of air outlets via a master outlet in fluid communication with the duct, characterized in that the air inlets and the air outlets are provided in the ceiling of the climate chamber (2, 2a, 2b).