BIOFUEL APPLIANCE VENTING SYSTEM

1 . A venting system for a biomass burning appliance, comprising:

at least one pipe element formed of a steel alloy comprising: a maximum of 0.025 weight percent of Carbon, a maximum of 1.0 weight percent of Manganese; a maximum of 0.030 weight percent of Sulfur; a maximum of 1.00 weight percent of Silicon; a maximum of 0.035 weight percent of Nitrogen; a range of 17.50-19.50 weight percent of Chromium; a maximum of 1.00 weight percent of Nickel; a range of 1.75-2.5 weight percent of Molybdenum; and a range of a combination of Titanium+Columbium having a minimum of percentage of 0.20+4 ×(C+N) and a maximum of 0.80 percent.

2 . The system of claim 1 further including a biomass burning appliance burning a biomass fuel.

3 . The system of claim 1 wherein the at least one pipe element comprises an exhaust system including at least a one cylindrical pipe sections pipe sections, a storm collar and a vertical termination, each of which is comprised of the steel alloy.

4 . The system of claim 3 wherein the at least one pipe element further includes an appliance adapter 110 comprised of the steel alloy.

5 . The system of claim 4 wherein the biomass fuel produces an exhaust containing at least the following NH 4 C 1 , K 2 SO 4 , KCl, KHCO 3 , HNO 3 and H 2 SO 4 .

6 . The system of claim 4 wherein the biomass fuel produces an exhaust containing at least one of NH 4 Cl, and KCl, and at least one of HNO 3 and H 2 SO 4 .

7 . A biomass fuel burning heating system, comprising:

a biomass fuel appliance producing an exhaust containing at least one of NH 4 Cl, and KCl, and at least one of HNO 3 and H 2 SO 4 ; and

an exhaust system including at least one cylindrical pipe sections, a storm collar and a vertical termination; each of said sections, collar and termination being comprised of steel including at least a maximum of 0.025 weight percent of Carbon, a maximum of 1.0 weight percent of Manganese; a maximum of 0.030 weight percent of Sulfur; a maximum of 1.00 weight percent of Silicon; a maximum of 0.035 weight percent of Nitrogen; a range of 17.50-19.50 weight percent of Chromium; a maximum of 1.00 weight percent of Nickel; a range of 1.75-2.5 weight percent of Molybdenum; and a range of a combination of Titanium+Columbium having a minimum of percentage of 0.20+4×(C+N) and a maximum of 0.80 percent.

8 . The system of claim 7 wherein the appliance includes a burning biomass fuel consisting primarily corn.

9 . A biomass fuel burning heating system, comprising:

a biomass fuel appliance producing an exhaust containing at least one of NH 4 Cl, and KCl, and at least one of HNO 3 and H 2 SO 4 ; and

an exhaust system including at least one cylindrical pipe sections, being comprised of steel including at least a maximum of 0.025 weight percent of Carbon, a maximum of 1.0 weight percent of Manganese; a maximum of 0.030 weight percent of Sulfur; a maximum of 1.00 weight percent of Silicon; a maximum of 0.035 weight percent of Nitrogen; a range of 17.50-19.50 weight percent of Chromium; a maximum of 1.00 weight percent of Nickel; a range of 1.75-2.5 weight percent of Molybdenum; and a range of a combination of Titanium+Columbium having a minimum of percentage of 0.20+4 ×(C+N) and a maximum of 0.80 percent.

10 . The system of claim 9 wherein the biomass fuel produces an exhaust containing at least the following NH 4 C 1 , K 2 SO 4 , KCl, KHCO 3 , HNO 3 and H 2 SO 4 .

11 . The system of claim 10 wherein the biomass fuel produces an exhaust with a temperature in the range of about 0-650 degrees Fahrenheit.