What are the pros and cons of an interior versus exterior chimney? We’re working on a limited budget and need an option that won’t break the bank — either with construction costs now or fuel bills later.
It makes sense. If your chimney is located inside, any heat lost from the mass of the chimney itself stays within the room. If your chimney is on the outside of your home, you not only lose that heat to the outdoors, cooler exterior temps could penetrate your chimney. A fireplace must maintain a very high temperature for the fuel to combust completely, but exterior chimneys exposed to cold weather and wind tend to foster cooler burning temperatures. As a result, creosote (a tarry buildup created by incompletely combusted oils found in wood and fossil fuels) can accumulate, causing a fire hazard. A well-ventilated, centrally located chimney is more likely to burn cleanly, reducing your energy bills and maintenance needs.