Baxi Solo 2 60 RS Installation And Servicing Instructions page 16

Installation - Page 16
Flue Preparation
Unpack flue duct, flue trim and air duct.
Measure overall wall thickness. If this is between 280mm (11
in) and 355mm (14in), use flue as supplied without
alteration.
For wall thickness between 102mm (4in) and 280mm (11 in),
air duct and flue duct are required to be shortened.
Using the indication on the duct, mark accordingly to table
below.
Bend tabs as shown.
Using tin snips, cut around ducts at appropriate mark.
Remove any sharp edges.
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