Good friend of mine is selling his house and the home inspector told him that the smoke chamber was formed with cinder block that led into the terra cotta flue and that it needs inspected by a chimney swwep. The sweep showed up and and told him that with the smoke chamber being lined with Cinder Block, he could not reccommend using this fire place to burn wood or gas due to the cinder block. This fireplace is in the center of his house and nothing was ever mentioned when during inspection when he purchased the home. Just trying to figure out the actual safety specs. He was set to close on the sale this week and this just came up. Any help would be appreciated. He is not looking to hide anything but rather just get the actual info and I know from browsing this site your guys will have the info! Thanks in advance! Your help is much appreciated.