Central heating boiler has insulation molded into two half-shells, on to which sheet metal cladding is fitted by tabs which fit through slits in moldings and are bolted to boiler block

摘要

The central heating boiler has insulation molded into two half-shells (2, 2'). Sheet metal cladding (3, 4) is fitted on to these by tabs (5) which fit through slits in the moldings and are bolted to the boiler block (1).