I am familiar with these free-standing wood burning fireplaces. They were manufactured in the 70s and have not been produced since 1982. The fireplace has a 6-sided enclosure and a circulation fan on the back. The flue is a large diameter high temp enamal pipe in Red, Green or Brown (my recollection is 10 or 11 inch diameter) that is very uncommon to find. You must use double wall pipe and a firestop where it passes through the ceiling and roof.
Most of these stoves require repair to the interior insulation bricks and often the log grate is missing or rusted. I recommend a modern stove that is more efficient and safer, but we still have one at my in-laws cottage in use. Work with a reputable stove shop to obtain the proper flue pipe and fire-stops. If you do not use the correct pipe and fittings the installation is very unsafe.