| 摘要 |
The hot-air duct for heating a wooden house consists of two boards held at a distance by means of webs (3), at least one of the boards being a cement-bonded wood particle board (5). Arranged offset between the webs (3) are ribs (6) for deflecting the airstream guided through the duct (1). The cement-bonded wood particle board (5) is suitable both for forming the ducts and, in particular, also as a heat transmission surface. <IMAGE>
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