Government of Nepal under AEPC has been promoting domestic bio gas plant construction across the country since 1992. The sizes adopted for the construction of domestic biogas plants consist of GGC 2047 and Modified GGC 2047 for the sizes 2, 4, 6 and 8 m3 capacities. The experienced and qualified biogas companies are capable of constructing the smaller capacity biogas plants by following the available standard documents such as drawings, construction manual and specification approved by APEC.