The growing demands for sanitary regulations in medical facilities, particularly operating rooms, highlight the importance of ensuring high air quality and minimizing airborne hospital-acquired infections. Improperly designed ventilation systems may lead to contamination of up to 90–95% of patients, especially in light of evolving threats, such as COVID-19. This study focuses on enhancing the energy efficiency and performance of air conditioning and ventilation systems for cleanrooms, where air recirculation is not permissible. A novel energy-efficient direct-flow air treatment scheme is proposed, integrating a heat pump system with adjustable thermal output. A computational fluid dynamics CFD model of a clean operating room was developed to assess the impact of inlet air velocity on aerosol particle removal and airflow stabilization time. The model also considers the effect of personnel movement. The results supported optimized air distribution, reducing microbial contamination risks, with less than 10 CFU/m³, and improved thermal performance. The proposed system was evaluated for energy and cost efficiency compared to conventional setups. Findings can inform the design and operation of cleanroom ventilation in surgical environments and other high-tech applications. This research contributes to improving indoor air quality and reducing infection risks while enhancing sustainability in healthcare infrastructure.

The article discusses the prospects of using self-compacting concrete (SCC) based on local raw materials to produce reinforced concrete structures. The focus is on reducing energy consumption in the construction industry by eliminating heat treatment and mechanical sealing processes, as well as minimizing transportation costs. In Kazakhstan, the application of SCC is limited; however, studies confirm its effectiveness. Experiments demonstrate that incorporating zeolite and stone flour as fillers improves the rheological properties of concrete and reduces cement consumption while maintaining high performance. The resulting mixture achieves B30 strength and meets the re-quirements for floor slab production. Microstructural analysis revealed enhanced strength and density properties of the concrete due to active additives. The adoption of SCC technologies can reduce direct energy costs by 20–25% and promote sustainable development in the industry by utilizing local resources and lowering envi-ronmental impact. To this end, SCC compositions based on local raw materials were developed, and the interactions among concrete components during property formation were investigated. Concrete with reduced binder content and average strength was suc-cessfully produced.