A retrofit emission control device is a mechanism that is installed at the exhaust outlet of a diesel generator to reduce emissions. A Retrofitted emission control equipment for a DG set is the most effective way to filter out harmful components like diesel particulate matter(DPM), carbon monoxide(CO), hydrocarbons(HC), sulfur dioxide(SO₂), nitrogen oxides(NOx). Retrofitting can simply be termed as installing an emission control device to remove harmful emissions from a diesel engine exhaust. Retrofitted Emission Control equipment for dg set (RECD) from Vasthi Instruments can efficiently remove over 90% of the particulate matter and other pollutants from a DG set’s exhaust. The retrofitted emission control equipment is a device mandated by the Central Pollution Control Board (CPCB) for all fuel combusting engines, vehicles, and generators. The retrofit emission control device is an immediate and the most effective way to reduce harmful components from diesel generator emissions. The RECD is an adequate modification for a diesel generator set to reduce harmful diesel particulate matter (DPM), carbon monoxide, and methane emissions from the exhaust. A retrofit emission control device effectively reduces hazardous sulfur dioxide and nitrous oxide emissions that deplete the ozone layer from the DG exhaust emission. The retrofit emission control device (RECD) is also a great way to reduce dangerous concentrations of Particulate matter (PM 10 & 2.5) that cause severe respiratory issues. The retrofit emission control device is an ideal way to prevent hundreds of hazardous chemical particles produced in the combustion process of fossil fuels in diesel generators from entering the atmosphere.