I posted under the General Question catagory some concerns I still am having with a strong draft on warmer or damp days. Greg ,aka LS Farm mentioned the idea of removing my ss liner and insulating it. This would be impossible in my installation due to a 6" liner snuggly fit into a 8" telacotta square flue. But I have an idea!
I work in the cryogenic industry. I should be able to obtain many bags of perlite. Perlite is for the most part the same as vermiculite. Vermiculite is used as an insulator in furnaces, flues , etc. It is fireproof, rot proof, & very plentiful so I don not expect the cost to be much. I have worked with perlite. It is a grain like mineral which is very light. We use it to insulate cryogenic tanks. I have literally topped of large vessells with multiple bags of perlite. We simply hook up a vacuum pump to the valve at the bottom of the tank, and allow the vacumm to suck the perlite into the voids from the vacuum plate at the top of the tank. The wind will easily blow it away thus the reason to suck it in.
I could pour or suck the perlite into the corners of the square tellacotta to help insulate the ss liner using a shop vac for suction or simply a large funnel.
Has anyone ever seen or heard of this before? Richard, Greg?