| 摘要 |
The present invention relates to a gas fed water-heater comprising a double wall container ( 1 ) inside which a burner ( 2 ) and a tank ( 3 ) of the water to be heated are arranged. At least in the portion ( 5 ') adjacent to the burner ( 2 ) of the interspace ( 5 ) between the two walls of said container ( 1 ) is placed a thermoinsulating system comprising an inner layer ( 6 ) of glass wool or rock wool and an outer layer ( 7 ) formed of at least a one vacuum panel, which comprises an envelope which encloses inert material powder with an average size of the particles lower than 100 nanometers.
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