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.).
If you are looking at natural gas fireplace inserts, then around $800 is a relatively low price for a very basic unit. The more full-featured models can easily cost $4,000 or more, with an average price range falling between $1,200 and $2,000.ost masonry fireplaces cost $5,000 or more due to the labor required to install each individual brick or stone within your home. A masonry heater (a very large stone stove) can cost upwards of $20,000 because of the tremendous amount of custom work that is required.