I AM FITTING A WOOD BURNER MY COTTAGE IS 200 YEARS OLD AND SEMI DETACHED THE CHIMNEY IS A JOINT CHIMNEY THE ATTACHED FIREPLACE IS BLOCKED UP WITH AN AIR BRICK, MY FIREPLACE HAS ALWAYS HAD AN OPEN FIRE AND I WANT A WOODBURNER I WILL FIT A FLUE,DOWN THROUGH THE CHIMNEY TO THE WOOD BURNER WILL THIS CAU...