On March 11, 2019 at 12:05, Ernie Gilman said...
People like Fire Departments and Building and Safety Departments are a bit sticky about what you put on a door to open it that might, incidentally, keep it from opening in case of a fire and resultant loss of power.
You said you wanted something to close a door, so a magnetic door-holder-opener along with a spring or hydraulic closer sounded about right. Then you said you wanted to open the door with it. That's a lot harder to make safe.
Doors that slide can be opened by pulling or pushing on the panels and single doors that swing can be opened if the power goes out- fire codes demand that.
