What is the typical sulfur content of No. 2 heating oil?

The typical sulfur content of No. 2 heating oil is indeed less than 500 ppm (parts per million). This specification is important for a variety of reasons, including environmental regulations aimed at reducing air pollution. Lower sulfur content in heating oil means that when the oil burns, it produces fewer sulfur oxides, which are harmful pollutants contributing to acid rain and respiratory problems.

In the context of heating oil, the trend has been towards reducing sulfur content over the years to meet stricter environmental standards and provide cleaner burning fuels. Many states have adopted regulations that require No. 2 heating oil to meet these lower sulfur limits, which is reflected in the correct choice. Understanding the composition of heating oil and its environmental impact is essential for HVAC professionals, ensuring compliance with regulations and promoting cleaner air quality.