Dorma Door Closer 669g Manual -
The is a heavy-duty, overhead concealed door closer (often found on metal frame doors in commercial or high-traffic residential settings). The "G" typically indicates a guide rail (slide arm) version.
The is a heavy-duty, overhead concealed door closer (often found on metal frame doors in commercial or high-traffic residential settings). The "G" typically indicates a guide rail (slide arm) version.