Safety - 316L stainless steel exhaust pipe is safely routed to a corn stove for the combustion exhaust. The combustion air intake is routed from the outside and is preheated by the exhaust also providing insulation to safely emit the exhaust. There is no room depletion of the oxygen. All EPA, NFPA, and local fire codes are in compliance with a properly installed corn stove. Local inspectors verify installation for a basic charge less than $100 in most locations.