Repacking type 4 heat exchangers

38 mm is too thick, you want something 2 or 3 mm thick.

 

I just used the tech data from that one, I was actually thinking of the 6mm version blanket. It'll compress when sandwiched between the outer skin and the reflector plate.

 

Have you not got an old duvet you could use? Just a thought.

 

Dog ate it