Real Investment Evidence in Residential Energy Retrofit: Lessons from a Large-Scale Italian Case Study
住宅エネルギー改修における実投資のエビデンス：イタリア大規模事例研究からの教訓 (AI 翻訳)
Riccardo Cardelli, Sara Nappa, G. Dall’O’, Simone Ferrari
🤖 gxceed AI 要約
日本語
本論文は、イタリアの国家プログラムで改修された34棟の集合住宅の前後のエネルギー性能と投資コストを分析し、断熱、HVAC、再生可能エネルギー導入の実際の費用対効果を評価。理論モデルと実績の乖離を示し、深い改修政策の経済的持続可能性に示唆を与える。
English
This paper analyzes pre- and post-retrofit energy performance and investment costs of 34 residential buildings renovated under an Italian national program. It evaluates cost-effectiveness of insulation, HVAC upgrades, and renewables, revealing gaps between theoretical models and real outcomes, contributing to European deep renovation policy debates.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
日本でもZEB基準や既存住宅の省エネ改修促進策が進むが、実務上のコストデータは不足。本論文の分析手法や実証結果は日本の改修政策や補助金設計の参考になる可能性がある。
In the global GX context
This paper provides rare empirical evidence on real retrofit costs and energy savings, directly relevant to global decarbonization of building stock. It highlights the financial challenges for meeting EU 2050 goals, informing the work of ISSB/TCFD on physical asset transition risks and investor expectations for green building investments.
👥 読者別の含意
🔬研究者:Provides a rare large-scale empirical dataset on real retrofit costs and energy performance gaps, useful for validating energy models.
🏢実務担当者:Offers benchmarks for actual investment costs required for deep energy retrofits, aiding budgeting and business case development.
🏛政策担当者:Highlights the gap between theoretical and actual cost-effectiveness, informing design of subsidy programmes and regulatory frameworks for decarbonizing buildings.
📄 Abstract（原文）
The decarbonization of the building stock by 2050, as set by the European Green Deal, calls for an unprecedented wave of energy renovations. Yet, reliable evidence on the real costs and performance of retrofit interventions remains scarce. This paper presents the results of a large-scale technical and economic analysis conducted on 34 residential buildings, all renovated under a national Italian programme supporting energy efficiency improvements. For each building, pre- and post-renovation energy performances were assessed using standardised procedures, while detailed investment cost data were collected for all implemented measures, including envelope insulation, HVAC system upgrades, and renewable integrations. By combining these datasets, the study evaluates the actual cost-effectiveness of different retrofit strategies, revealing the true financial effort required to achieve substantial energy improvements. The results highlight both the opportunities and limitations of current approaches, showing a significant gap between theoretical models and real outcomes. The findings contribute to the European debate on the economic sustainability of deep renovation policies.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.3390/en19061426first seen 2026-05-15 20:35:27
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