The semi-recessed frame allows a Rinnai Fully Recessed Metal Box to be used where only a shallow wall cavity of between 140mm and 230mm is available.
To be used in conjunction with RBOX02 or RBOX05
When used with RBOX02 (Infinity 32) - protrude 100mm from the wall.
When used with RBOX05 (Infinity 32 Enviro) - protrude 145mm from the wall.