12. energy audit for large companies - energy audit that includes energy audit of buildings in accordance with the law regulating construction and energy audit of technological processes or industrial plants in accordance with the rulebook on energy audits for large enterprises 13. energy - primary energy sources and/or transformed form of energy, i.e. electricity, thermal energy, gas, oil and oil derivatives and energy from renewable sources 14. energy service - implementation of an energy efficiency project and other related activities based on an energy performance contract with a guarantee that under reference conditions it leads to a verifiable and measurable or estimable improvement in energy efficiency and/or energy and/or water savings