Current 48++ Gas Fireplace Insert Installation Cost
Current 48++ Gas Fireplace Insert Installation Cost. The lower end of the range assumes that your existing fireplace is in good while more costly, the rigid liner sections are typically factory insulated and seal very well. If the chimney needs repair or replacement, expect an additional charge of $400 to $6,000. The average gas fireplace installation cost is similar to electric, but if you have to install a gas line, the installation will indeed go up.