Gas logs sets are fairly inexpensive and easy to install once a gas line is run into your fireplace. With a simple push of a button on your remote control gas logs produce a impressive flame in your fireplace.  Napolwon , Majestic , Rh peterson real fyre are some of the best gas logs in the industry. Fireplacesrus.net  has them all. For less than 1,000 you can own most of the best log sets around. They are available in vented as well as non vented. Vented gas logs are better for use over many hours vent free are better for use over short periods of time. Vent free gas logs are almost 100 percent efficient  however over a long period of use they produce moisture into the home. When using gas logs for a extended period of time vented gas logs are recommended.