SPORTIVE LAWN HEATING APPARATUS Russian patent published in 1998 - IPC

FIELD: equipment for heating sportive grounds, may be used in greenhouses. SUBSTANCE: apparatus has primary heat-exchanging system connected with central heating system and via heat-exchanger with secondary independent closed heat-carrier circulation system. Secondary heat-carrier circulation system has heating pipes arranged in parallel one with another in cultured layer of soil under plant cover. Drain pipes are positioned below heating pipes. Ends of heating pipes are connected in series alternation with branch pipes on distribution and assembling pipelines on one end of lawn and with branch pipes of distribution and assembling pipelines on other end of lawn. EFFECT: increased efficiency, wider operational capabilities and provision for conducting contests during the whole calendar year. 7 dwg