Economical & Versatile Here's the secret to a warmer cozier home! Retrofit your drafty old fireplace with this beautiful Napoleon gas insert. The Roxbury 3600 is especially designed to fit small wood burning, zero clearance fireplaces and comes complete with a heat activated variable speed blower system. Create the exact designer touch you have been looking for with optional choices including faceplates, flashing kits and cast iron surrounds in various styles and finishes.