Patent ID: 8803041

Claim:
A flow heater comprising: a heater with an outer contour and comprising a tubular heating body with a metal jacket; and a tube arrangement for passing through fluid to be heated, said tube arrangement comprising a first tube and a second tube, said tube arrangement surrounding said heater at least in some sections, said first tube comprising first tube wall sections facing said heater and said first tube having a first tube inner contour, said second tube comprising second tube wall sections facing said heater and said second tube having a second tube inner contour, said first tube inner contour and said second tube inner contour being adapted to said outer contour of said heater, whereby said first tube wall sections facing the heater and said second tube wall sections facing the heater are in flush contact with sections of said outer contour, wherein a sum of a dimension of said first tube inner contour and a dimension of said second tube inner contour substantially corresponds to a dimension of said outer contour.