Various pieces of legislation have been introduced to mitigate the environmental impact of boiler emissions. The EU's Ecodesign Directive outlines stringent efficiency and emission standards for heating appliances, including boilers. This legislation is designed to improve energy efficiency across the board, thereby reducing greenhouse gas emissions. Additionally, the Boiler MACT (Maximum Achievable Control Technology) in the United States mandates that industrial boilers meet specific air quality standards, pushing manufacturers to adopt cleaner technologies.

On a national level, many countries have implemented regulations that govern the emission limits of nitrogen oxides (NOx), particulate matter, and carbon monoxide from boilers. These regulations not only aim to improve air quality but also encourage the adoption of innovative technologies. Compliance with these laws often necessitates upgrades or retrofits of existing boiler systems, fostering a transition to more sustainable practices within the industry. Companies are increasingly prioritising these guidelines, as non-compliance can lead to substantial fines and reputational damage, underlining the significance of adhering to environmental legislation.