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 donât already have an existing fireplace itâs likely that a zero-clearance unit will be the logical choice. The term âzero-clearanceâ refers to a manufactured fireplace that can be built into a frame wall. Zero-clearance fireplaces can be gas or wood models.here are many different factors that can affect the price of a new fireplace unit. Equipment costs for a gas fireplace can range from $2000.00 â $5000.00. Depending on the route, these venting components will likely total $300.00 â $700.00. Installation charges often start around $500.00.