Retrofit programs for old and highly energy-inefficient housing stock from the Soviet era are widely believed to offer a rare win-win opportunity for mitigating climate change and addressing acute energy poverty issues in Eastern European urban neighborhoods. However, despite government subsidies and a push for greater energy efficiency, many people do not undertake retrofits. This raises the question: do these retrofits truly deliver the promised returns? This paper aims to examine the effects of retrofit programs on old Soviet-era multi-apartment buildings' realized dynamic energy savings in Lithuania by analyzing monthly energy bills. Our findings suggest that retrofits are associated with a 50% to 59% reduction in average space heating consumption across various post-retrofit periods. Additionally, retrofits have a short-term effect on electricity savings of 3% to 3.6%. However, our cost-benefit analysis indicates that the energy savings were not sufficiently large to cover the initial investment costs.

中文翻译：

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实现苏联时代多公寓建筑改造对能耗的动态影响

人们普遍认为，对苏联时代旧的和能源效率低下的住房进行改造计划，为缓解气候变化和解决东欧城市社区严重的能源贫困问题提供了难得的双赢机会。然而，尽管政府提供补贴并推动提高能源效率，但许多人并没有进行改造。这就提出了一个问题：这些改造真的能带来承诺的回报吗？本文旨在通过分析每月的能源账单，研究改造计划对立陶宛旧苏联时代多公寓建筑实现的动态节能的影响。我们的研究结果表明，改造后各个时期的平均空间供暖消耗量减少了 50% 至 59%。此外，改造还可带来 3% 至 3.6% 的节电短期效果。然而，我们的成本效益分析表明，节省的能源不足以覆盖初始投资成本。