Quality Ducts Make In Singapore the coolest hvac ducts make in singapore Learn more We make all flexible ducts to your project requirements Flexible ducts Flexible duct semi rigid duct Why choose Koolflex Our flexible ducts are made from quality materials and passed all relevant tests required by the authority. Learn More SUPPORT SINGAPORE PRODUCTS! HVAC products and accessories Beside flexible ducts, we supply accessories that goes with duct installation. These include, aluminium foil, aluminium tapes, hose clamps, sealants, etc. Learn more