hey all, this has been a very informative forum but i have a few specific questions to pick your brains with. i have a large superior heatform fireplace with a stone chimney and 8x13 clay tile liner located on an exterior wall that is roughly 30 ft tall. will be looking to heat about 1600 square foot mostly open area with large loft overlooking vaulted living room ceiling. now the questions haha. i'm looking at a timberwolf 2201 insert, good idea? bad idea? decent product? next question i will have to line the chimney to the top correct? and insulate it? is flex pipe ok? next question will this approach meet codes or standards and be safe? and finally can i cut out the damper but more importantly the heat circulation tubes above the fire box to get my liner through and still be safe? i am an experienced welder and metal fabricator so cutting out the old and welding in a new block off plate shouldnt be a problem, if it is ok to butcher the existing fireplace.thank you all for your help i know this is alot in one post. i am sorry but im looking to pull the trigger soon, tired of my heat going up the chimney and paying the electric company to replace it haha. yall have a good day.