How the Excretory and the Respiratory system work together How the Excretory and the Circulatory system work together How the Excretory and the and the Digestive system work together
1 Top vented gas fireplace inserts cost $750 to $3,000, and installation adds another $500 to $1,000. 2  Direct-vent gas fireplaces cost $1,000 to $3,500, plus $500 to $1,000 for installation.
Most of the heat that is produced will go up the chimney in this case. For the equivalent in a gas insert or gas fireplace, a large could use about 40,000 BTU/hour and in this case would cost about $0.40/hour to operate for natural gas and about $1.31/hour for propane.