How many grades of fuel oil are normally considered as heating oils?

Heating oils, also known as fuel oils, are commonly categorized into two main grades: No. 1 fuel oil and No. 2 fuel oil. These grades are primarily used for residential and commercial heating purposes.

1. No. 1 Fuel Oil:

• Also known as "kerosene."
• It has a lower viscosity and a higher ignition point compared to No. 2 fuel oil.
• No. 1 fuel oil is commonly used in portable stoves, space heaters, and as a backup heat source.

2.No. 2 Fuel Oil:

• This is a heavier distillate fuel compared to No. 1 fuel oil.
• No. 2 fuel oil is a common choice for residential and commercial heating systems, including furnaces and boilers.
• It is also used in diesel engines for various applications.

While No. 1 and No. 2 fuel oils are the most common for heating purposes, there are additional grades, such as No. 3, No. 4, and No. 5 fuel oils. These heavier grades are typically used in industrial settings for heating and power generation. The choice of fuel oil grade depends on factors such as the type of heating system, climate conditions, and local regulations.