Economic effects of changes in the required thermal insulation of building partitions in Poland

Abstract

Thermal insulation on the external partitions of the buildings is a very usual strategy to reduce energy demand for heating. This paper presents an original study of the demand for usable energy QH,nd of a single-family residential building in different climatic conditions (milder conditions – Szczecin, national average – Lodz and more severe conditions – Zakopane) on the thermal transmittance coefficient of selected partitions: external walls, roof, windows and balcony doors, roof windows and doors. They were adopted at three levels, corresponding to the maximum required values, as approved in the Technical Conditions, for periods from 2014, 2017 and 31.12.2020. Based on the results of the computational experiment, three deterministic mathematical models were developed, and the effects of factors on the Y function for the assumed climate conditions were analyzed. Financial savings related to the introduction of stricter requirements for thermal protection of buildings in Poland were determined.