Installation is not difficult even for a novice like me. The most challenging part is to secure the screen door to the lintel. The machine screw underneath the lintel and the thumb screw to its back needed to be tightened almost in tandem to find the right pressure and angle for a snug fit. I had to loosen, tighten them repeated ad nauseum until the screen door won't wiggle. I haven't used the fireplace, so I cannot comment on the door's functionality.