What grade of oil is most commonly used for domestic and small commercial boilers?

Grade 2 oil is the most commonly used fuel in domestic and small commercial boilers. This type of oil has a moderate viscosity, making it suitable for efficient burning and heat production in smaller heating systems. Grade 2 oil is also more readily available and typically less expensive than heavier grades, which is advantageous for homeowners and small businesses looking to manage their heating costs.

Its characteristics allow for good performance in various weather conditions and ensure that the boiler operates effectively. Furthermore, the combustion efficiency of Grade 2 oil helps maintain lower emissions compared to heavier oil grades, making it a more environmentally friendly option for heating. This combination of availability, efficiency, and environmental consideration makes Grade 2 the preferred choice for many domestic and small commercial heating systems.