Any tips on installing the Harman Chimney Top Air Intake?

[Don2222]

Hello

Got the air adapter and chimney top air intake. I have installed the air adapter on a Harman Insert but never the top air Intake.
Has anyone done this? Any comments or tips?

It looks like it is adjustable to the size of the chimney top and comes with galvanized self tappers.

See pics and instructions below

 

[Don2222]

Hello
Here is a recent post with install pics!
https://www.hearth.com/talk/threads/oak-location-for-harman-insert.169283/#post-2275689

Thanks to JRex

 

[jrex]

If you have it assembled to the length and width needed to go around your flue I would mark the "extra" length that is not needed with a sharpie even with the nail lip on each adjacent piece. Now take it apart and cut to length at your sharpie mark on all 4 pieces. You can do this with a tin snips. Put back together. Then go up on the roof. Attached the finished air intake "box" to the crown of the chimney. I ran a bead of silicone under it and attached each side with 2 tapcon screws. I also put silicone on the seams of the unit. Run the liner down the chimney. On top of the air intake SS box goes a flat SS piece with the liner hole in the middle. I put a bead of silicone where the 2 pieces meet and attached the flat piece with 2 screws each side. Mine was 18x18 and gave me a slight over hang of the Harman air intake. I think 13x13 is also a common size. Cut liner to length and add chimney cap.

Caution with the sharp edges of the liner. Should wear gloves I ended up with a few cuts along the way.