Vented gas logs are designed to be installed in wood burning fireplaces where the chimney and fireplace are in good enough condition to safely burn wood. You CANNOT install a vented gas log in a fireplace that was NOT designed to burn wood. If you have a gas fireplace, you cannot replace the log set with a vented gas log, it is unsafe. Also, you cannot install a gas log in a wood stove. Read more about where vented gas logs can and cannot be installed here: Where Can Gas Logs Be Installed?