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BE895544A
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Draft regulator for heaters
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DE2950690A1
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Regulation of gas burner operation - has exhaust gas sampling to control setting of butterfly valves controlling through flow
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DE2950689A1
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CONTROL DEVICE FOR THE COMBUSTION AIR AMOUNT OF A FIREPLACE
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DE2833463A1
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DEVICE FOR AUTOMATIC CONTROL OF THE PRESSURE IN THE COMBUSTION ROOM OF A BURNER
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DE2819280A1
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Shut=off for furnace chimney flue - has motor and reduction drive mounted directly on chimney wall to rotate butterfly spindle
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DE2819282A1
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Energy consumption measurement for heating plant - involves monitoring burner ON and OFF periods with and without exhaust valve control
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