System type, brand, and complexity of the setup. For instance, a System 3 package from a reputable installer may cost SGD $3,000–$4,500, including materials and labour. Well-known installers like Gain City, Coolserve, and Jex Aircon offer full packages that include consultation, unit supply, and installation, with warranty and service support. It's important to hire BCA-certified tech... https://www.vdairconservices.com/services/new-system-installation/