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HORVAT, B., ČEPIČ, B., VARL, N.
CONTRACTUAL PROVISION EFFICIENT ENERGY CONSUMPTION - REFURBISHMENT OF AN HEATING OIL HEATING PLANT
KOMUNALNA ENERGETIKA / POWER ENGINERING, 26
Heating apartments and business premises is not only a necessity for normal life and work, but also an economic category, because it represents costs and a health category, because it pollutes the air with CO2 and causes harmful effects on our health with particulate matter (PM10, PM2,5), nitrogen oxides and other substances. In order to achieve business strategies and European environmental commitments in the field of environmental and energy policies, Energija plus included in its sales program beneath electricity also the sale of natural gas and biomass, and implemented the refurbishment of an heating plant and district heating system in Pobrežje, Maribor. The project refers to the heating of 580 residential units, covering total 26.510 m2 of heated living area. The heating plant was built in 1974 and based on mazut. That was later changed to the heating oil. The walls of the buildings were simple and without insulation also without insulating doors and windows. During the period between 2010 and 2014 the owners accomplished energy renovation of apartment buildings by changing external doors and windows, additional thermal insulation of the facade and in partnership with Energija plus refurbishment of heating. Users of the heating system got with renovation a modern heating plant and heating system which provides less harmful emissions in their local environment and significantly lower cost of heating. Fixed costs of heating system management together with the costs of financing the project remained the same as they were before the investment. Variable costs decreased by more than 30 %, which was a primary objective of the users.

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