Hidden Vent Block Frame

By Huu Khanh Nguyen · Updated October 25, 2026 · Aluprof, Reynaers, hidden vent

A wide block frame that holds the glass in a pocket between a deep outer lip and a thin inner lip, so no sash shows from outside.

Parameters

Name	Default	Unit
Face width	82	mm
Depth	70	mm
Rebate depth	17.2	mm
Rebate width	37.3	mm