VPT60AA1AK1-CL22-HDT5-HDT6-VPA 60 MBH NG LOW INTENSITY 115V 2-STAGE SPARK IGNITION CL22: 2-STG DIGITAL H/C T-STAT w/ FAN SW HDT5: BURNER INSERT IN FIRST TUBE HDT6: 4 FT TURBULATOR AT END OF TUBE SYSTEM VPA: 20 FT TUBE PKG (1 CALCOAT, 1 STEEL)