This heater is such that a panel heater provided, on the reverse of a panel, with an adiabatic insulation material for blocking outside air temperature and keeping warm is attached to the side of a greenhouse, and an aluminum fin pipe heater is installed at 2.5-3 m interval therebetween. 外気温度を遮断し、保温できる断熱保温材をパネルの裏に設けたパネルヒーターを温室の側面に取付け、その間にアルミフィン管ヒーターを2.5m〜3mの間隔で設ける。 - 特許庁