indirect

In the case of a piece of equipment such as a pump, the supplier's costs may be broken down into the directs of labour, material, and component costs on the one hand, and the indirects of customized engineering, sales, factory overheads, and order management costs on the other.

Indirect radiators are seldom installed except for rooms on the first or second floors; and in the former case the duct, D, is very short, and in the latter it is usually from 12 to 16 feet long. It should be stated in this connection that indirects of large size should be spread out as much as possible so as to give a large area against the current of air.