How could an old, inefficient fireplace be transformed into a draft-free, aesthetically pleasing source of warmth? Essentially, the fire can be enclosed within a "fireplace box" to contain the combustion and channel the by-products up the chimney. This is the concept behind fireplace inserts, an upgrade for homeowners which stops sending so much heat up the chimney, and instead directs the heat to the area it is designed to heat, the living space within the home. Beyond the times when the fireplace is in use and potentially sending heat into the street via the chimney, an additional problem historically has been the cold drafts which come down the chimney and into the home when the fire is not lit. Whereas these negative impacts have always been an expected part of home ownership, modern solutions like fireplace inserts can impact utility bills by burning the fuel more efficiently and can add to the property valuation.