Modular flue adapter system and method

A fireplace or stove system configured to provide offsetting of a firebox flue, comprising:

• a firebox comprising an
• exhaust output;
• firebox mounting plate;
• and
• substantially flat top portion,
• a receivable slot;
• and
• a modular device comprising:
• a first portion connected to said firebox, said first portion comprising a planar member configured for slidable insertion within said receivable slot of said firebox such that said modular device is substantially planar with said substantially flat top portion when said modular device is coupled to said firebox;
• and
• a second portion coupled to said first portion and detachably coupled to said firebox mounting plate, said second portion comprising a bottom member, a pair of side members, a back member, an adapter plate and a firebox flue, wherein said bottom member is coupled to said pair of side members, said back member, and said adapter plate, and said firebox flue is coupled to said pair of side members, said back member and said adapter plate, such that said second portion defines a conduit for exhaust between said exhaust output and said firebox flue, said side member having an offset distance;
• wherein upon insertion of said first portion into said receivable slot, said adapter plate of said second portion abuts said firebox mounting plate to provide a seal, said modular device is at least partially internal within said firebox, and said firebox flue is offset by said offset distance relative to said firebox.