1. IEA. “Heating,” 2022. Accessed: Feb. 03, 2023. [Online]. Available: https://www.iea.org/reports/heating.
2. European Commission. “Progress on competitiveness of clean energy technologies 4 & 5 - Solar PV and Heat pumps,” Brussels, Oct. 2021. Accessed: Oct. 12, 2022. [Online]. Available: https://energy.ec.europa.eu/system/files/2021-10/swd2021_307_en_autre_document_travail_service_part3_v2.pdf.
3. IEA. “Heat Pumps,” 2022. Accessed: Feb. 03, 2023. [Online]. Available: https://www.iea.org/reports/heat-pumps.
4. BSRIA Ltd. “BSRIA’s view on refrigerant trends in AC and Heat Pump segments,” Jan. 2020. Accessed: Nov. 14, 2022. [Online]. Available: https://www.bsria.com/uk/news/article/bsrias_view_on_refrigerant_trends_in_ac_and_heat_pump_segments/.
5. Onno K. “Report Annex 46 HPT-AN46-04: Refrigerants for Heat Pump Water Heaters,” Heat Pump Centre c/o RISE – Research Institutes of Sweden, Borås, Dec. 2019. Accessed: Oct. 12, 2022. [Online]. Available: https://heatpumpingtechnologies.org/annex46/wp-content/uploads/sites/53/2020/10/hpt-an46-04-task-1-refrigerants-for-heat-pump-water-heaters-1.pdf.