EconCalc software tool CEC5

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Within the project CEC5 (MA 4.1), an overview of the software tools that are recommended to be usesd in line with a CESBA harmonized building evalauation process is giving. Econcalc is an excel-based software tool that makes it possible to exactly compare factors like the feasibility of sustainable factors and enables a comparison of different energetic concepts.

The tool

The consideration of sustainable factors in constructing and refurbishing buildings has become an essential determinate in nowadays building environments. In order to ensure the economic feasibility and profitability of these factors, a clear comparison among potential energetic concepts should be taken out. EconCalc, is an excel-based tool that provides a sophisticated methodology to estimate and compare exactly these factors.

The recommended guidebook introduces the theoretical methods and comparative approach that the excel-tool uses in order to identify the economic feasibility of ecological aspects of up to five building types. While applying the tool, the user can decide which of the provided parameters should be selected. Investment-, maintenance- and overhaul costs can be related to individual construction elements and life cycle costs of the whole building. Costs that are related to energy usage are measured by predefined energy indices and the energy source at actual market prices. In case of movements in price levels (e.g. through inflationary tendencies), the tool allows for adjustment. Furthermore, the tool allows for a consideration of subsidies, residuals and credits with favorable interest rates. As a matter of comparison between the feasibility of different sustainable initiatives, the method compares factors such as price of saved end energy consumption per kwh, the annuity profit for owner-occupied property. For general property, a capital value comparison and annuity comparison can be taken out.

Additional information

The „econ calc“ tool which is explained in the attached guidebook is an open source tool that allows a clear and structured assessment of the costs associated with energy efficiency measures in new and existing buildings and compares these to “conventional” energetic quality scenarios. The period under consideration for the calculations of profitability and economic feasibility are ranging from 20 to 50 years and consider residuals and replacement investments throughout this time. Since the forecast of the costs throughout the life-cycle of a building is hard to predict, a set of assumptions that can freely be chosen for individual cases should make the results more precise (this applies for costs as well as predefined energy indices).

An economical optimization of energy concepts requires a baseline of detailed and validated energy consumption estimations and calculations as made with PHPP (also recommend for the CESBA evaluation and introduced in this summary).

Source and Download

CESBA Studybook on software manuals

Other tools