This is my first stove I have ever bought and installed, so everything is very new to me. I just bought a used Consolidate Dutchwest FA288CCL. Our house has a 6 inch chimney liner already installed (only about 3 years ago, from my understanding. We moved in just this past August) that was used for a wood burning hearth stove that was taken out by the time we moved in. Our new stove has an attachment that comes from the stove (it's a rectangle opening from the stove) and transitions into an 8 inch round. Am I able to install a simple 8 inch to 6 inch reducer in order to connect to the chimney liner, or is something else needed? Thanks!