we suggest the heat below 170c degrees to avoid damaging the fibers. having been there, i can tell you what a warm and welcoming place it is. though i may want to, i cannot sleep through life and arrive at a season i prefer to my present circumstances. win your holiday purchases up to $5,000. the building and unit are in great shape and show very well. bring mixture to a simmer and cook, covered, until vegetables are almost cooked but still raw in the center, about 7 minutes.5. 