On and off showers today, so I spent some time on energy conservation items. Felt good to be in the shop, unhurried. Had good concentration for the fitting process.
I used piece of linoleum for my pattern. Carefully measure and locate the openings on the pattern. Keep track of up, down, left and right. lol.
Fitted pretty well and duct taped in place. The lines at the top will be tabs. Every other one will be bent down onto the flange to sort of hang the cover in place for installation. The other tabs will be used to secure the SPAI manifold cover to the burner shell cover.
Install 1 1/2" rock wool (flush with edge of flanges). The space below the lower flanges is below the bottom of the grate. and occupied by the reduction products (CO, H2, etc). This is the finished gas and can begin to be cooled now.
Insulate the SPAI manifold. It’s counter productive to expose your preheated air to a (relatively) cool surface now.
Wrap SPAI preheated air delivery tubes with an inch or so of rock wool wrapped in 3M duct tape, the best, imho. Over lap tape to keep this water tight.
With these three openings fitted the rest is just a straight wrap to finish covering the back side.
I will cut the coverings out of an old HWH shell. It’s already painted and pre-rolled more or less for ease of use. You do save yours, right?
To my fellow Veterans and all Americans, thank you and God bless America.