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.).
As we said, gas fireplace costs can vary dramatically depending on what kind of unit you are looking for. Weâve taken different samples below so you can get an idea on what you are paying for. If you are looking for something just on the low end, you can expect to pay about a few hundred dollars or less. The gas log set featured here is the Peterson Gas Logs 18 Inch Post Oak Vented Natural Gas Log Set With G4 Burner. It is priced at $250.