Hansen's disease, also known as leprosy, is a chronic bacterial disease that primarily affects the skin, peripheral nerves and upper airway.ansen's disease, also known as leprosy, is a chronic bacterial disease that primarily affects the skin, peripheral nerves and upper airway.
1 Direct-vent gas fireplaces cost $1,000 to $3,500, plus $500 to $1,000 for installation. 2  The cost of a ventless gas fireplace is $500 to $2,500, and while there are additional installation costs, you may pay extra for finish work (such as a mantle, marble surround, etc.). The cost of a ventless gas fireplace is $500 to $2,500, and while there are additional installation costs, you may pay extra for finish work (such as a mantle, marble surround, etc.).
1 A natural stone fireplace might cost $2,500 to $3,500, while a stone veneer fireplace costs about 25% less (or $1,875 to $2,625). 2  If you plan on using gas burning logs in the fireplace, add $750 to $1,000 for a gas log kit. Should the new fireplace be incapable of connecting to an existing chimney (a relatively inexpensive project), you may have to install a new chimney at a cost of $60 to $100 per linear foot for an engineered (or metal) chimney or $100 to $200 per linear foot for a masonry chimney.