Child resistant window handles are not all built around the same safety logic. This guide compares key-locking, push-button and tilt-first options, explains where each design works, and shows why buyers must look beyond the word “child-safe” to the complete window system.
Exterior and interior door handles may look nearly identical, but their engineering requirements are not. Exterior hardware must survive weather, corrosion, security loads, gasket compression, and environmental exposure, while interior hardware is usually driven more by ergonomics, accessibility, traffic level, privacy, and finish consistency.
EN 12209 and EN 15685 are not competing standards. One covers mechanically operated non-multipoint locks; the other covers centrally controlled multipoint locking systems. Here is how to classify your hardware correctly before testing, certification or procurement.
The EN 13126-3 classification code looks compact, but every position carries a specific performance claim. This guide explains the 2023 eight-position code, exposes common supplier mistakes, and shows buyers what evidence to demand before approving a window handle.
Coastal hardware failures rarely begin with dramatic red rust. They start at concealed fasteners, damaged coatings, wet crevices, dissimilar-metal joints, and specifications that confuse salt spray hours with real service life. This guide explains how to write a corrosion requirement that suppliers can actually manufacture, test, and prove.