This study presents the design and experimental analysis of an innovative underfloor heating and cooling zoning system utilizing evacuated tube solar collectors with heat pipes. The system's design and implementation, performance evaluation, economic analysis, and environmental impact assessment were thoroughly examined. Key findings include the significant energy savings achieved by underfloor systems compared to traditional split-system air conditioners, with Zones A and B demonstrating much lower energy consumption for both heating and cooling. The efficiency of underfloor systems is further evidenced by shorter operational times and more effective temperature maintenance. the energy consumption dropped from 10709 kw/h to 5114 kw/h, by 52% Economic analysis revealed that the renovated solar collector system offers the shortest payback period of 5.89 years and substantial cost savings, with annual costs dropping, by58.33 from $504 to $210. Environmental benefits are equally noteworthy, with CO2 emissions reduced from 18,233 kg to 6,264 kg, by 65.66% highlighting the system's role in promoting sustainability Comparative analysis of different heating systems underscores the renovated solar collector's superior performance in both financial and environmental aspects. While traditional collectors and split-system AC & gas heaters lag behind in terms of payback period, energy savings, and CO2 reduction, the renovated solar collector system emerges as the most sustainable choice. This study underscores the importance of integrating efficient and sustainable heating and cooling solutions in buildings. The dual-zoning capability of the underfloor system, coupled with its energy efficiency, cost savings, and reduced environmental footprint, makes it a compelling alternative to conventional Heating, Ventilation, and Air Conditioning systems. These findings advocate for the adoption of advanced underfloor systems, emphasizing the need to consider both financial and environmental impacts in selecting building climate control solutions.
