PROBLEM TO BE SOLVED: To provide an up-flow type greenhouse horticulture hot air heater for solving problems with the arrangement of an air duct. SOLUTION: To the upper part of a casing 2, a cylindrical base with a flange 13 is fixed in communication with the inside and outside of the casing. An air outlet body 14 forming a horizontal hot air outlet 12 is supported on the base in a peripherally swingable manner by a plurality of guide rings 15 to be guided on the upper face of the flange in the peripheral direction. On the upper part of the casing 2, a driving motor 20 is mounted at a position a predetermined distance from a trunk portion 14b of the air outlet body 14 for driving a belt means 18 wound on the trunk portion 14b of the air outlet body 14. With the operation of clockwise and counterclockwise limit switches arranged at two positions along the peripheral direction of the air outlet body, an oscillating control means controls the reverse oscillating motion of the air outlet body. A swing blade 30 is arranged in the air outlet 12 for vertical swinging motion in linkage with the oscillating motion of the air outlet body. COPYRIGHT: (C)2009,JPO&INPIT
