Dec / 2014 We switched to Propane Heat, New Furnace and All with a couple extra taps to add on Appliances should we choose.. Thinking of Installing a Gas Fireplace in a Converted Basement Bedroom (25' X 13').. My Query is Running the Exhaust & Vent Pipes? Thinking of locating the Gas Fireplace on an Inside Wall, Could / Can We "T" into the Existing Exhaust & Vent Pipes leading from the Furnace?.