In 2025, with the deepening of environmental protection concepts and the continuous increase in environmental governance efforts, the issue of oil fume emissions in the catering industry is receiving increasing attention. A series of newly introduced environmental policies have provided more detailed and strict regulations on the emission standards of oil fume purifiers. This is not only related to the compliant operation of catering enterprises, but also closely linked to the living environment and health well-being of the general public. Next, we will delve into these policies and comprehensively interpret their core points.

One Core standard upgrade for oil fume purifier

（1） Stricter restrictions on oil fume emission concentration

In the past, some regions had relatively relaxed requirements for the concentration of cooking fume emissions. However, under the new policy in 2025, most cities will significantly reduce the concentration limits for cooking fume emissions. For example, some first tier cities have explicitly stipulated that the concentration of oil fumes emitted by catering enterprises after treatment with oil fume purifiers shall not exceed 1.0mg/m ³, which is much stricter than the previous standard of 2.0mg/m ³ or even higher. This means that catering enterprises must ensure that oil fume purifiers have higher purification efficiency in order to achieve standard emissions.

（2） Non methane total hydrocarbons (NMHC) are included in key control measures

Non methane total hydrocarbons, as important pollutants in oil fumes, have potential hazards to the atmospheric environment and human health. For the first time in 2025, environmental policies will include non methane total hydrocarbons in the key control scope of emission standards for oil fume purifiers. Many regions require that the concentration of non methane total hydrocarbons emitted from catering fumes be controlled below 10mg/m ³. Taking a large commercial complex as an example, there are numerous catering merchants inside, and in the past, only the removal of oil fumes was focused on, neglecting the emission of non methane total hydrocarbons. After the implementation of the new policy, merchants have upgraded and renovated their oil fume purifiers to meet this new emission requirement.

（3） The bottom line of purification efficiency has been significantly improved

In order to achieve more efficient oil fume purification, policies have put forward higher requirements for the minimum purification efficiency of oil fume purifiers. In the past, the purification efficiency requirement in some regions may only be around 75%, but by 2025, most regions will increase this value to over 85%, and some environmentally sensitive areas may even require a purification efficiency of 90% or higher. For example, in surrounding dining establishments such as schools, hospitals, and residential areas, it is necessary to install oil fume purifiers that meet purification efficiency standards to minimize the impact of oil fume on the surrounding environment. This requires catering enterprises to pay more attention to the purification efficiency parameters of equipment when choosing oil fume purifiers, ensuring that they can meet local policy requirements.