Hello all. My wife and i just moved into a home with a fireplace and oil boiler. To offset oil cost we are installing an insert. We decided on a flush mount and got an enviro cabello 1700. To be installed on nov 18th. Dealer sold me the 1700 even though my fire place depth now is 19 inches and the 1700 need a little over 22 inches. I wanted the 1700 over the 1200. He told me he can remove brick in rear to fit it. Does this seem right? I know they can be made for zero clearance so im guessing fire brick is not needed behind an insert. Thanks. I got a great deal on the 1700 since he had overstock. The 1200 would have run me a few hundred more.