See the official and primary references used, what each source supports and when it was reviewed.
Bureau of Energy Efficiency, Government of India
Used to explain why the model label is the preferred source for appliance energy information. No star-rating consumption figures are invented.
Ministry of New and Renewable Energy, Government of India
Used for programme context only. Solar yield remains a user-entered location assumption.
Department of Land Resources / API Setu, Government of India
Provides selected state-specific land-record conversion factors and demonstrates why local context is mandatory.
Ministry of Statistics and Programme Implementation, Government of India
Cross-reference for selected state units. Rounded published factors are labelled approximate.
National Institute of Standards and Technology
Used for standard square-foot, square-metre and acre relationships.
GharGanit editorial methodology
Formulas are derived from units and expose every editable efficiency, density, dry-volume and wastage assumption.