Description
The embedding flange is what you need if the heater is going to sit partly recessed into the bench or platform rather than free-standing on the floor. It caps the cut edges of the woodwork around the heater in a single stainless frame.
Flange H is sized for the full-size HIVE. It is the largest flange in the range, because the cut-out it has to cover is the largest — and a rough edge that size is not something you can hide behind a bench slat.
Without it you are looking at raw sawn timber against a hot appliance — the joint that always looks unfinished no matter how carefully the carpentry was done, and the one that darkens first. The flange covers the tolerance you needed to leave for the cut-out.
Decide on recessed installation before the bench is built: the cut-out has to be sized to the flange, not the other way round.
Fits these heaters
Fits the full-size HIVE series only (not HIVE Mini):


