A greenhouse (10) is disclosed that generally comprises an enclosed growing section (16) with an enclosed end gable (14) adjacent to the growing section. The end gable (14) is arranged to flow air into the growing section (16). Air distribution tubes (18) are included within the growing section (16) with the tubes (18) arranged to provide for substantially uniform air flow into the growing section (16). The air tubes (18) can also be arranged to compensate for heat differential between the air in the tubes (18) and in the growing section (16).
