$750 to $3,000
1 Vented gas logs (need a working chimney) run about $300-$550, and ventless/unvented gas logs (without a working chimney or pipes) are $350-$600, with installation estimated at $200-$350 for a basic project, according to Hearth.com. 1 They cost about $400-$1,500 plus installation of the gas lines and any desired mantle or surround. 2  Some states do not allow the use of ventless fireplaces or restrict their use. 3  Some ventless models require you to keep a window open while using the fireplace. The actual cost to install a gas fireplace may vary depending on your location, the product selected, complexity of the installation process, additional accessories purchased, and other options. 1  Top vented gas fireplace inserts cost $750 to $3,000, and installation adds another $500 to $1,000. 1 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.). 2  Some top-of-the-line gas fireplaces may cost as much as $5,000 to $10,000 or more. 3  A gas log kit might cost $750 to $1,000 installed Installation adds $200 to $350 extra to cover a licensed contractor and a new gas outlet. Another conversion method uses top-vented gas fireplace inserts, which may include fans and thermostats. These cost from $1,200 to $2,900, plus another $600 to $1,000 for professional installation. 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.). 1 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.). 2  Some top-of-the-line gas fireplaces may cost as much as $5,000 to $10,000 or more. 3  A gas log kit might cost $750 to $1,000 installed 1 Options include fans to move the heat, remote controls, wall switches and wall-mounted thermostats. 2  Inserts cost $1,200-$2,900, with professional installation adding another $600-$1,000. 3  A direct-vent gas fireplace doesn't need a chimney and is a way to add a fireplace where there isn't one. 1 They cost about $400-$1,500 plus installation of the gas lines and any desired mantle or surround. 2  Some states do not allow the use of ventless fireplaces or restrict their use. 3  Some ventless models require you to keep a window open while using the fireplace. 1 Inserts cost $1,200-$2,900, with professional installation adding another $600-$1,000. 2  A direct-vent gas fireplace doesn't need a chimney and is a way to add a fireplace where there isn't one. 3  Installation is through an outside wall, and a pipe-within-a-pipe feature lets air in and exhaust out with just one vent. 1 They cost about $400-$1,500 plus installation of the gas lines and any desired mantle or surround. 2  Some states do not allow the use of ventless fireplaces or restrict their use. 3  Some ventless models require you to keep a window open while using the fireplace. 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. 1 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.). 2  Some top-of-the-line gas fireplaces may cost as much as $5,000 to $10,000 or more. 3  A gas log kit might cost $750 to $1,000 installed 1 Ventless (also called vent-free or unvented) gas fireplaces don't need a chimney or vent, and are either zero clearance (right against a wall) or close clearance (a few inches away). 2  They cost about $400-$1,500 plus installation of the gas lines and any desired mantle or surround. 1 They cost about $400-$1,500 plus installation of the gas lines and any desired mantle or surround. 2  Some states do not allow the use of ventless fireplaces or restrict their use. 3  Some ventless models require you to keep a window open while using the fireplace.
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installing gas fireplace insert cost