Energy Performance Certificate and energy models

What are EPCs and energy models?

Energy consumption in a building depends on many factors such as weather conditions, the number of people using the facility or internal thermal conditions. The calculation of this parameter is therefore complicated, but necessary to plan activities aimed at optimizing energy consumption.

The primary tools for assessing a building’s energy efficiency are EPC and energy models. 

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Konrad Kądziołka

Business Development Representative

EPC - Energy Performance Certificate

EPC (Energy Performance Certificate) of a building is an official document that certifies the energy consumption for the analyzed facility and is currently necessary for all commercial buildings.
EPC is required by the Energy Performance Act implementing European Union Directive 2010/31/EU. According to it, newly constructed buildings must meet strict requirements for maximum energy consumption. The document is executed on the basis of the Regulation of the Minister of Infrastructure of 27 February 2015 on the methodology for determining the energy performance of a building or part of a building and energy performance certificates, as amended.
The document is primarily used to inform owners, tenants and users of real estate about the energy efficiency of a given facility and concerns, buildings and premises rented and sold on the basis of a sales contract.
The EPC energy certificate contains an energy assessment of the building and recommendations for improving energy efficiency.

Energy model of the building

The energy model of a building is a simulation in which a three-dimensional model of the real building is created. The model takes into account building materials, the construction of walls and partitions, as well as all energy-intensive systems present in the building, such as air conditioning, ventilation, heating and lighting. In addition, based on weather data such as temperature, wind speed and insolation, the response of the systems to external conditions is analyzed to maintain appropriate conditions inside the building, for example the right temperature. With a complete energy model, you can accurately map the actual energy consumption of a building and optimize system performance, making it possible to forecast future utility costs. In the case of existing buildings, the model is subject to calibration, i.e. adjustment of parameters to real consumption data, which allows to obtain compliance of the simulation with the actual results. Measuring the physical parameters of HVAC systems in an existing building is useful for determining the exact parameters of the model.

What are the benefits of EPC and energy models?

Obtaining the EPC certification or developing a building energy model confirms the energy efficiency performance of the building and helps identify areas for improvement. Some of the reasons why embarking on this journey may be worth your while include:
  • reduced consumption of energy, heating, gas and other utilities in the building, contributing to lower upkeep costs,
  • reduced carbon footprint, resulting in lower environmental and economic impact of excessive energy consumption,
  • optimised energy consumption based on analyses of design solutions aimed at reducing cooling and heating demand, improving the energy efficiency of equipment and adopting sustainable operating strategies for the building,
  • higher energy standards of planned construction projects,
  • optimized capital expenditures thanks to correct estimates of cooling and heating demand.

How do we make EPC and energy models of buildings?

We conduct energy modeling analyses using Integrated Environmental Solutions (IES) – one of the best solutions available on the market. We make models for LEED and BREEAM certification purposes as well as consulting models for investment optimization.
We make energy performance certificates in accordance with the applicable Regulation of the Minister of Infrastructure and Development of 27 February 2015 on the methodology for determining the energy performance of a building or part of a building and energy performance certificates. We use Audytor OZC 7.0 software.
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