Method for Calculating Greenhouse Gas Emissions from the Operation of Engineering Systems of Buildings

. Reducing greenhouse gas emissions is currently a priority for human civilization to reduce climate change. Engineering systems of buildings (heating, ventilation, air-conditioning, lighting, etc.) make a significant contribution to the carbon footprint. The methodology proposed in this article makes it possible to estimate the amount of emission from each of the systems and outline ways to reduce them. A feature of the proposed methodology is the following provisions. The contribution to the greenhouse gas emissions of all engineering systems that ensure the comfort of the building’s premises is considered. The comfort of the building’s premises is considered in accordance with EN 15251 “Indoor environmental input parameters for design and assessment of energy performance of buildings addressing indoor air quality, thermal en-vironment, lighting and acoustics”. The environmental parameters are determined in accordance with the author’s methodology. When developing the methodology, the following simplifications were made. The winter humidification system is not considered, while the dehumidification of air in summer during air conditioning is taken into account. Coeffi-cients of working hours of systems are given as an example. Normative indicators are considered in accordance with DSTU B A.2.2-12 “Energy efficiency of buildings. Method of calculating energy consumption for heating, cooling, ventilation, lighting and hot water supply”. The technique can be used both for estimating the CO 2 emissions of existing buildings and for choosing the option of forming the microclimate of the designed building. An especially useful technique may be to select the appropriate microclimate formation technology for building reconstruction by comparing the amount of emission from various options. Priorities of improvement of the engineering systems can be grounded based on their share in whole CO 2 emission.