Regenerative air heating system

Claim 1

A REGENERATIVE HEATING SYSTEM FOR USE WITH WARM AIR HEATING SYSTEMS OF THE FUEL COMBUSTION TYPE AND COMPRISING A COMBUSTION CHAMBER, INCLUDING A HEAT EXCHANGER; A CHIMNEY PIPE DEFINING AN EXIT FROM SAID HEAT EXCHANGER, WHEREBY SPENT PRODUCTS OF COMBUSTION ARE VENTED TO ATMOSPHERE; A HOT AIR PLENUM AND A COLD AIR PLENUM, SAID HOT AIR PLENUM INCLUDING AN EXTENSION ABOUT SAID HEAT EXCHANGER, THEREBY TO PROVIDE AN AIR CIRCULATION SYSTEM; A HORIZONTAL CONNECTING PLENUM BETWEEN SAID HOT AIR PLENUM AND SAID COLD AIR PLENUM; A PREHEAT PIPE HAVING A SUBSTANTAILLY FLAT, HOLLOW CONFIGURATION EXTENDING VERTICALLY UPWARD FROM SAID HEAT EXCHANGER INTO SAID HOT AIR PLENUM EXTENSION AND HORIZONTALLY THROUGH SAID CONNECTING PLENUM INTO SAID COLD AIR PLENUM TO DEFINE A CIRCULATION SYSTEM FOR HOT GASES FROM SAID HEAT EXCHANGER; AND PIPE MEANS CONNECTING THE DISTAL END OF SAID PREHEAT PIPE TO SAID COMBUSTION CHAMBER, WHEREBY SAID HOT GASES ARE RE-COMBUSTED TO REDUCE CARBON MONOXIDE THEREIN.