Ultra Low Sulfur Heating Oil (ULSHO).
More efficient, cleaner heat.

Bioheat ULSHO Sets the National Standard for Clean Home Heating

As of July 1, 2018 all heating oil sold in Connecticut is now Bioheat ULSHO (Ultra Low Sulfur Heating Oil). Connecticut’s Bioheat ULSHO contains approximately 7% biodiesel and just 15 parts-per-million (ppm) sulfur, making it much cleaner and better for both the environment and your home heating system.



Lower maintenance

Taking sulfur out of fuel causes no problems for oil heating equipment or storage tanks. Reducing the amount of sulfur prolongs the life of heat exchangers (particularly condensing boilers and furnaces) because of the elimination of soot and scaling.

Improved efficiency

Taking sulfur out of fuel causes no problems for oil heating equipment or storage tanks. Reducing the amount of sulfur prolongs the life of heat exchangers (particularly condensing boilers and furnaces) because of the elimination of soot and scaling.

Less Pollution

Burning ULSHO means reduced sulfur dioxide by 97%, particulate matter by 90%, and nitrous oxide by 10%. When you include the biodiesel blend you can add 5-10 points to those numbers.