(57) A boiler assembly 1 comprises a removable boiler unit 2 detachably connected to a
manifold unit 4. The manifold unit 4 provides the boiler unit 2, in use, with a connection
interface to a pipework system. The manifold unit 4 comprises a rear section comprising
at least one guide rail 37 so positioned on the manifold unit 4 that, during assembly,
the boiler unit 2 is moved along the guide rail 37 which supports and guides the boiler
unit 2 on to the manifold unit 4. When assembled, the guide rail 37 supports the weight
of the boiler unit 2. A rear portion of the boiler unit 2 comprises a rearwardly directed
exhaust gas flue duct 25, and the rear section of the manifold unit 4 is provided
with a flue box 35, a front portion of the flue box 35 being provided with a forwardly
directed exhaust gas flue inlet 41 and a top portion of the flue box 35 is provided
with an upwardly directed exhaust gas flue outlet 43, the assembly 1 is arranged such
that as the boiler unit 2 is moved along the guide rail 37, the boiler unit 2 exhaust
gas flue duct 25 sealingly connects with the manifold unit 4 exhaust gas flue inlet
41, the exhaust gas flue outlet 43 being arranged to be connected to a flue connection
in the building.
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