What is the primary fuel source for most low-pressure boilers?

Natural gas is the primary fuel source for most low-pressure boilers because it is widely available, cost-effective, and efficient in terms of energy production. It offers a cleaner alternative to other fossil fuels, resulting in lower emissions of pollutants and greenhouse gases when combusted. The use of natural gas allows for better control of the combustion process, leading to enhanced performance and reliability of the boiler.

While oil and electricity are also used in some applications, natural gas remains the most prevalent due to its infrastructure and ease of use. Other options, such as coal and wood pellets, are less common for low-pressure boilers nowadays due to environmental concerns and efficiency issues. Coal, while historically significant, has declined in use because of its higher emissions and the shift towards cleaner energy sources. Wood pellets are associated with biomass systems and are less typical for low-pressure boiler operations. Therefore, natural gas, along with oil and electricity as alternatives, highlights the most common fuel source for this type of equipment.