Under the EcoNiwas Samhita (Energy Conservation Building Code for Residential Buildings) Implementation Programme, EcoNiwas Samhita Cells have been established in five different states – Uttar Pradesh, Punjab, Delhi, Karnataka and Maharashtra – to successfully enforce residential building energy efficiency policies. 

The PMAY affordable housing project was selected by the Uttar Pradesh Cell with the support of UPNEDA and GIZ to demonstrate the ENS Compliance of the building. The Project is located at Lucknow Gomti Nagar Extension in Uttar Pradesh and it is constructed by Lucknow Development Authority. According to the Energy Conservation Building Code (ECBC) for Residential Buildings, the Residential Envelope Transmittance value (RETV) for building envelope is categorised into four climate zones namely Composite-Climate, Hot-Dry Climate, Warm-Humid Climate and Temperate Climate. This project falls under the Composite Climate zone. It consists of a total built-up area of 1645.56 m² (G+3 including all Wall, Corridor, Stairs) and 4 Floors (G+3) with a total of 48 flats having Carpet Areas of 24.14 m² each.

With the technical assistance provided by the team, the project was able to achieve an energy-efficient envelope having lower thermal transmittance value of roof and RETV (Residential Envelop Transmittance Value) of 9.19 W/m², which complies with the code. As per the calculations, the Energy savings for each dwelling on the top floors with air-conditioning and efficient roof insulation is 1863 kWh per dwelling unit, with an annual savings of more than 25% with respect to the base case.