<；P>；PROBLEM TO BE SOLVED: To provide a method for temperature reduction/air ventilation in a hothouse solving the following problems: a conventional method of temperature reduction/air ventilation in a hothouse provided with a flank surface ventilation fan and/or a suction fan intends introduction of outer air and discharge of inner air based on the introduced air to aim at environmental maintenance via the partial flow of the air flow in the hothouse but has problems in securing the whole flow of air in the hothouse because of absence of insect-proof net and/or circulation fans, and is not sufficient for prevention from invasion of harmful insects/harmful poultry and animals which scrawl(s) on the ground or fly(s) in the air even when setting the insect-proof net. <；P>；SOLUTION: The method of temperature reduction/air ventilation comprises stretching an insect-proof net at a longitudinal side surface of the hothouse and forming a ventilation fan and/or a suction fan at the flank surface, wherein the introduction of the outer air into the hothouse via the suction fan and the discharge of the air in the hothouse via the ventilation fan are simultaneously performed so as to positively introduce the outer air from the insect-proof net through utilizing linear air flow while securing air flow in a ridge direction of the hothouse toward the longitudinal direction of the hothouse. <；P>；COPYRIGHT: (C)2008,JPO&INPIT
