pumps, building automation, and ventilation equipment. Services include inspection, troubleshooting, and expert consultation on system performance and regulatory compliance. RELK HOOLDUS works with municipal, institutional, and other professional clients that require stable building services and controlled indoor climates. The company also holds an environment license for handling stationary refrigeration and heat pump equipment, which supports work on environmentally regulated systems. Its activities integrate installation projects with long-term service contracts for building technical systems.