An end-port regenerative furnace, comprising: - a housing; - a combustion chamber disposed within the housing; - a charging end associated with the combustion chamber; - a first port and a second port at the housing for communication with the combustion chamber at the charging end; - a discharging end associated with the combustion chamber and spaced apart from the charging end; - a first regenerator disposed at the charging end and in communication with the combustion chamber through the first port, the first regenerator adapted for cyclical operation between a firing mode wherein fuel is injected proximate preheated combustion air passing through the first port into the combustion chamber, and an exhaust mode wherein products of combustion are exhausted from the combustion chamber through the first port; - a first oxy-fuel burner assembly disposed between the charging and discharging ends and adapted for cyclical operation among a fuel rich mode and a fuel lean mode concurrent with the cyclical operation of the first regenerator; - a second regenerator disposed at the charging end and in communication with the combustion chamber through the second port, the second regenerator adapted for cyclical operation between the firing mode wherein fuel is injected proximate preheated combustion air passing through the second port into the combustion chamber, and the exhaust mode wherein products of combustion are exhausted from the combustion chamber through the second port; and - a second oxy-fuel burner assembly disposed between the charging and discharging ends and adapted for cyclical operation among a fuel rich mode and a fuel lean mode concurrent with the cyclical operation of the second regenerator; wherein - the first oxy-fuel burner assembly is operable in a fuel rich mode on a firing side of the furnace, said fuel rich mode being concurrently with the firing mode of the first regenerator for a time interval to provide fuel rich combustion and a fuel rich combustion product flow within the combustion chamber, and - the second oxy-fuel burner assembly is operable in a fuel lean mode on an exhaust side of the furnace, said fuel lean mode being concurrently with the exhaust mode of the second regenerator for the time interval to provide additional oxygen to react with the fuel rich combustion product flow and form an exhaust flow from the combustion chamber; after said time interval - the first oxy-fuel burner assembly is operable in the fuel lean mode on the exhaust side and the first regenerator is operable in the exhaust mode, and - the second oxy-fuel burner assembly is operable in the fuel rich mode on the firing side and the second regenerator is operable in the firing mode for another time interval to reverse the combustion flow and the exhaust flow within the combustion chamber to cycle between the first and second regenerators (24, 26). - a housing; - a combustion chamber disposed within the housing; - a charging end associated with the combustion chamber; - a first port and a second port at the housing for communication with the combustion chamber at the charging end; - a discharging end associated with the combustion chamber and spaced apart from the charging end; - a first regenerator disposed at the charging end and in communication with the combustion chamber through the first port, the first regenerator adapted for cyclical operation between a firing mode wherein fuel is injected proximate preheated combustion air passing through the first port into the combustion chamber, and an exhaust mode wherein products of combustion are exhausted from the combustion chamber through the first port; - a first oxy-fuel burner assembly disposed between the charging and discharging ends and adapted for cyclical operation among a fuel rich mode and a fuel lean mode concurrent with the cyclical operation of the first regenerator; - a second regenerator disposed at the charging end and in communication with the combustion chamber through the second port, the second regenerator adapted for cyclical operation between the firing mode wherein fuel is injected proximate preheated combustion air passing through the second port into the combustion chamber, and the exhaust mode wherein products of combustion are exhausted from the combustion chamber through the second port; and - a second oxy-fuel burner assembly disposed between the charging and discharging ends and adapted for cyclical operation among a fuel rich mode and a fuel lean mode concurrent with the cyclical operation of the second regenerator; - the first oxy-fuel burner assembly is operable in a fuel rich mode on a firing side of the furnace, said fuel rich mode being concurrently with the firing mode of the first regenerator for a time interval to provide fuel rich combustion and a fuel rich combustion product flow within the combustion chamber, and - the second oxy-fuel burner assembly is operable in a fuel lean mode on an exhaust side of the furnace, said fuel lean mode being concurrently with the exhaust mode of the second regenerator for the time interval to provide additional oxygen to react with the fuel rich combustion product flow and form an exhaust flow from the combustion chamber; - the first oxy-fuel burner assembly is operable in the fuel lean mode on the exhaust side and the first regenerator is operable in the exhaust mode, and - the second oxy-fuel burner assembly is operable in the fuel rich mode on the firing side and the second regenerator is operable in the firing mode for another time interval to reverse the combustion flow and the exhaust flow within the combustion chamber to cycle between the first and second regenerators (24, 26).