| 摘要 |
A fan assembly comprising two fans ( 4, 10 ) for supplying combustible gases to two burners ( 5, 9 ) respectively. The flow parts from the first and second burners are combined in a common manifold. Temperature censor ( 6, 11 ) detect the temperature of the gases passing through each fan, and the speed of a particular fan is increased if the temperature sensor detects reverse flow of combustion gases.
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