Biodiesel for Home Heating

Vermont-produced Liquid Biodiesel

A renewable fuel for your oil boiler

B100 (100% Biodiesel) can be a replacement for regular No. 2 heating oil as long as certain conditions are met and some simple steps are taken.

  • Your fuel tank needs to be in a space that stays above 42 degrees Fahrenheit. The lower boundary temperature for B100 biodiesel is 40-42 degrees, below which it will start to congeal.

  • Start with a blend - B100 biodiesel is cleaner than No. 2 fuel oil and will act as a solvent that removes some of the fuel oil sludge from your old fuel tank, One recommendation is to run 800 - 1,000 gallons of a B20 blend (20% biodiesel, 80% No. 2 fuel oil) through your system first before switching to B100, so as to avoid clogging your filters, which would likely occur with an immediate transition from No. 2 fuel oil to B100. Note: if you have a new fuel tank, you can start running on B100 right away, following the suggestions below. Note: If you don't mind changing your filters frequently as that sludge gets loosened, you could make a faster transition to B100. 

  • You will want to make sure that the line from your tank to your furnace/boiler is coated. 

  • Once you are running on B100, your burner nozzle should be adjusted to achieve ideal air flow for combustion (there is a difference between the BTU content of B100 (118,000 - 123,000 BTU/ gallon) and #2 Fuel Oil (138,000 BTU/ gallon). 

  • Once you are running on B100, there is a fuel pump that is made specifically for B100 (a rotary-style Webster pump) that costs around $110-$115.  

Interested in conversion? The following installers are willing to help.

Lloyd's Plumbing & Heating (802 426 2092)

Adam Woogmaster ( and 802 272 2769)

Bill Chidsey ( and 802 673 8227)

If you are interested in having B100 delivered to your home for heating, you can contact Jim Malloy from Black Bear Biodiesel at and 802 999 2380. 

To learn more, visit the Black Bear website: