Gas or oil fired water heater.

摘要

1. Gas-fired or oil-fired water heater in which a combustion shaft (2) with a heat exchanger (3) is arranged above a burner (1) and box-shaped waste gas collector (6) above the former, also with a blower (7) which is secured on the waste gas collector (6) and connected to a waste gas pipe (64),and with a second heat exchanger (10) in which the waste gases are cooled sufficiently for at least part of the steam formed during the combustion to condense, characterized in that the second heat exchanger (10), which is constructed as an independent subassembly, is arranged above the blower (7) and connected to the first heat exchanger (3) and to the blower (7) by two waste gas ducts (6b, 21 or 22, 6c) passing separately through the waste gas collector (6).