Evaluation principles & methods

Specific evaluation guidance

Knowledge base & case studies

wizard Evaluation methodology selection wizard

Methodology finder – Grants and subsidies – Services other than buildings

Available policy / sector / method combinations described in specific evaluation guides

  • Deemed savings [GUIDE 13]
    Deemed savings are a set of pre-determined savings values for efficiency measures that are calculated on the basis of data and assumptions from various sources available beforehand (e.g. previous studies, manufacturers data, national statistics, expert estimates, etc.). Deemed savings can also take the form of an algorithm, providing a formula that processes input data for arriving at a savings estimate. Deemed savings have a multitude of benefits; they are fast, easy to calculate, constant and predictable. Because of those traits, deemed values are commonly used to estimate energy savings from efficiency programs. Deemed savings are usually unitary energy savings, which means they are applicable to energy saving actions at the level of a single dwelling, installation or piece of equipment.

Evaluation methodology comparison table

Evaluation method Pros & cons Method characteristics Required input data
  Pro Con Savings output Aggregation level Application (ex-ante/ex-post) Energy use before and after actions Number of energy saving actions Energy saved per action Normalisation factors Gross-to-net adjustments
Deemed savings Cheap Imprecise Unitary, mostly system Bottom-up Ex-ante and ex-post No (covered in savings) By complementary method To be estimated No (covered in method) E.g. free riders (in case of subsidies)