Biomass boiler. Advice sought

[Straight Shooter]

What chimney construction you using LS ?........We are using Stainless steel insulated pipe on the new build for the wood burner for ease and efficiency...expensive but very fast to install .....27th October will be up and running, this is for backup the main system is LPG balanced flue boiler (off gas bottles ) .....on the internet they sell the bottles that can be filled at the filling stations so i will get some of those too, time will tell but the insulation we have used is incredible can't see us using much.