Chimney construction

Abstract From the Canadian patent

The invention provides a chimney structure comprising a base member of fireproof material and a hollow metallic core resting on said base member enclosed in an outer shell which is spaced from the latter. The core comprises a stacked series of individual hollow stainless steel sections joined together to define a vertical flue of the required length extending upwardly from the base member having at least one opening at a desired height above the base suitable for use as a clean-out and/or appliance connection. The shell is a vertical enclosure surrounding and spaced from the core and comprises vertically stacked box-like units assembled from four calcium silicate panels each and holding …