A Case study of the green building promotion support program for carbon neutrality in the building sector

Seongjo Wang

doi:10.22712/susb.20250020

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2025 Vol.16, Issue 3 Next Page

General Article

A Case study of the green building promotion support program for carbon neutrality in the building sector

30 September 2025. pp. 319-329

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Abstract

Green remodeling of aging buildings is a key strategy for achieving carbon neutrality in the building sector. This study analyzed the energy-saving effects of the Green Building Promotion Support Program in Suwon, Gyeonggi Province, South Korea. Using actual project data from 2016 to 2021 combined with field surveys, an evaluation model was developed for energy performance assessment, and the ECO2 simulation tool was applied to analyze five construction categories: window replacement, external insulation, internal insulation, lighting, and boiler replacement. The results showed that window replacement delivered the greatest energy savings (19.40%–20.86%), followed by external insulation (6.40%–12.04%), internal insulation (4.26%–9.13%), lighting (4.48%–6.88%), and boilers (1.56%–1.77%). Detached houses constructed before 1979, prior to the introduction of insulation standards, generally exhibited greater savings; however, lighting achieved higher savings in post-1980 houses, as reduced heat gains from efficient fixtures increased heating demand in winter. While external insulation recorded the highest relative improvement in thermal transmittance, windows achieved a far greater absolute reduction, underscoring the importance of building-level evaluations that account for absolute performance. This study demonstrates that improvements to the building envelope—particularly windows and insulation—achieve the largest energy savings. It is expected that the findings will contribute to optimal decision-making in future support programs for aging buildings.

Keywords

green remodeling

building energy

carbon neutral

green building

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Information

Publisher :Sustainable Building Research Center (ERC) Innovative Durable Building and Infrastructure Research Center
Publisher(Ko) :건설구조물 내구성혁신 연구센터
Journal Title :International Journal of Sustainable Building Technology and Urban Development
Volume : 16
No :3
Pages :319-329
Received Date : 2025-08-22
Accepted Date : 2025-09-01
DOI :https://doi.org/10.22712/susb.20250020

International Journal of Sustainable Building Technology and Urban Development ISSN:2093-761X(Print) 2093-7628(Online)

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