Energy Efficiency in Commercial and Office Buildings: Strategies, Technologies, Policy Frameworks, and Case Studies
DOI:
https://doi.org/10.54097/nah8k849Keywords:
Building energy efficiency, Commercial buildings, HVAC systems, Performance gap, China dual carbon, Green building, Renewable energy integration, Lifecycle cost analysis, Smart building, Near-zero energyAbstract
Commercial and office buildings represent one of the largest and most consequential energy-consuming sectors globally, accounting for approximately 31 percent of final energy demand in 2019 according to the Intergovernmental Panel on Climate Change Sixth Assessment Report. The persistent gap between designed and measured building energy performance remains a critical obstacle to achieving climate targets, particularly in rapidly urbanising economies such as China. This paper presents a comprehensive, evidence-based review of energy efficiency strategies, technologies, regulatory frameworks, and real-world performance across commercial and office buildings, with particular attention to the Chinese context and its dual-carbon policy commitments. Drawing on structured synthesis of major international assessments, peer-reviewed engineering and policy literature, and detailed documentation from four landmark case studies, namely the Shanghai Tower, the Empire State Building deep retrofit, the Bullitt Center, and China's near-zero energy demonstration programmes, the study develops a four-layer integrated performance framework encompassing load reduction, system efficiency, operational management, and governance. Quantitative analysis of technology performance reveals that combined interventions in a representative commercial office building can achieve 45 to 72 percent reductions in energy use intensity, with lifecycle internal rates of return ranging from 9.8 percent for envelope improvements to 33 percent for LED lighting retrofit. The policy comparative analysis identifies enforcement capacity and mandatory existing-stock requirements as the most critical gaps in China's otherwise ambitious regulatory framework. The paper concludes that high performance is fundamentally an integration and governance challenge rather than a technology problem, and provides targeted recommendations for designers, policymakers, and building operators.
Downloads
References
[1] Intergovernmental Panel on Climate Change. AR6 WGIII Chapter 9: Buildings. In: Climate Change 2022: Mitigation of Climate Change. Cambridge University Press, 2022.
[2] International Energy Agency. Energy Efficiency 2024. IEA Annual Report, Paris, 2024.
[3] Gutland M, Candanedo J A, Athienitis A, Bucking S. Meta-analysis of deep retrofit proposals and energy intensity reductions. Energy and Buildings, 2024, 323: 114801.
[4] Jiang Y, Ye Q. China Building Energy Consumption: Annual Report 2014. Tsinghua University Press, Beijing, 2014.
[5] People's Republic of China State Council. Carbon Peaking Action Plan for Urban and Rural Construction. State Council Publication, Beijing, 2022.
[6] Tsinghua University Building Energy Research Centre. China Building Energy Consumption Research Report 2022. Tsinghua University Press, Beijing, 2022.
[7] Li J, Chen Z, Hong T. Review of the building energy performance gap. IBPSA Building Simulation 2023 Proceedings, 2023, paper 1430.
[8] Almeida M, Ferreira M, Rodrigues A. Cost effective energy and carbon emissions optimization in building renovation. Energy and Buildings, 2017, 152: 718-738.
[9] Bai Y, Zhang Q, Liu X. Systematic examination of the energy performance gap in low-energy buildings. Renewable and Sustainable Energy Reviews, 2024, 199: 114501.
[10] United States Department of Energy. Commercial Buildings Energy Consumption Benchmark Comparison: ASHRAE 90.1-2019. DOE Office of Energy Efficiency and Renewable Energy, 2021.
[11] Crowe E, Granderson J, Piette M A. Building commissioning costs and savings across multiple project datasets. Energy and Buildings, 2020, 215: 109926.
[12] Granderson J, Fernandes S. The state and future of the EMIS industry for commercial buildings. Lawrence Berkeley National Laboratory, 2018.
[13] International Energy Agency. Heat Pumps: Overview and Emissions Reduction Potential. IEA Buildings Sector Report, 2022.
[14] Hong T, Wang Z, Luo X, Zhang W. Comparative study on energy performance of VRF and VAV systems. Lawrence Berkeley National Laboratory Technical Report LBNL-1006138, 2016.
[15] Amiri A J, Dong B, Hong T. Review of occupancy detection techniques for HVAC control and associated energy savings. Sustainable Cities and Society, 2025, 105: 105320.
[16] European Commission. Directive 2024/1275 on the Energy Performance of Buildings (Recast). Official Journal of the European Union, 2024.
[17] Rocky Mountain Institute. Empire State Building Retrofit Case Study Documentation. RMI Publication, 2009.
[18] Rocky Mountain Institute. Empire State Building Surpasses Energy Savings Expectations. RMI, 2011.
[19] Ministry of Housing and Urban-Rural Development, People's Republic of China. GB 50189-2015: Design Standard for Energy Efficiency of Public Buildings. MOHURD, 2015.
[20] Ministry of Housing and Urban-Rural Development, People's Republic of China. GB 55015-2021: General Code for Energy Efficiency and Renewable Energy Utilization in Buildings. MOHURD, 2021.
[21] Ministry of Housing and Urban-Rural Development, People's Republic of China. 14th Five-Year Plan for Building Energy Conservation and Green Building Development. MOHURD Official Publication, 2022.
[22] Baetens R, Jelle B P, Gustavsen A. Aerogel insulation for building applications: A state-of-the-art review. Energy and Buildings, 2011, 43(4): 761-769.
[23] Bunker A, Wildfire A, Lane J, Colagiuri R, Thompson J. Health, environmental, and energy implications of cool roofs: A review. Public Health Reviews, 2024, 45: 1606807.
[24] Akeiber H J, Nejat P, Majid M Z A, Wahid M A, Jomehzadeh F, Zeynali Famileh I, Calautit J K, Hughes B R, Zaki S A. A review and recent developments of phase change material (PCM) for latent heat transfer in buildings. Renewable and Sustainable Energy Reviews, 2016, 56: 1196-1211.
[25] International Energy Agency. Buildings Energy System Overview. IEA, 2023.
[26] Granderson J, Fernandes S. The state and future of the EMIS industry for commercial buildings. Lawrence Berkeley National Laboratory Report, 2018.
[27] United States Department of Energy. EnergyPlus Energy Simulation Software Documentation. DOE, 2022.
[28] Zuo J, Zhao Z Y. Green building research: Current status and future agenda. Renewable and Sustainable Energy Reviews, 2014, 30: 271-281.
[29] Melvin J. Split incentives in residential energy efficiency: Evidence of effects on energy use. Energy Economics, 2018, 72: 249-262.
[30] Urban Land Institute. 38 Percent Reduction in Annual Energy Use: Empire State Building Case Documentation. ULI, 2012.
[31] Gu J. Shanghai Tower: Building a green vertical city. Council on Tall Buildings and Urban Habitat 2015 Conference Proceedings, 2015.
[32] Bullitt Foundation. Bullitt Center Far Exceeds Energy Goals in First Year of Operation. Bullitt Foundation Official Report, 2014.
[33] Bullitt Foundation. Net Positive Energy Over First Decade. Bullitt Foundation Official Report, 2023.
[34] Bullitt Foundation. Living Proof: Bullitt Center Case Study Documentation. Bullitt Foundation, 2015.
[35] Zhou N, Khanna N, Feng W, Ke J, Levine M. CERC-BEE: China-US Clean Energy Research Centre for Buildings Energy Efficiency Overview. US DOE Publication, 2017.
[36] Gutland M, Candanedo J A, Athienitis A, Bucking S. Meta-analysis of deep retrofit proposals and energy intensity reductions. Energy and Buildings, 2024, 323: 114801.
[37] Gillingham K, Rapson D, Wagner G. The rebound effect and energy efficiency policy. Review of Environmental Economics and Policy, 2016, 10(1): 68-88.
[38] Du Q, Xiao M, Li J, Huang N, Li Y. The energy rebound effect of residential buildings: Evidence and policy implications. Energy Policy, 2021, 151: 112167.
[39] World Health Organization. WHO Housing and Health Guidelines. WHO Publication, 2018.
Downloads
Published
Issue
Section
License
Copyright (c) 2026 Academic Journal of Applied Sciences
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
