Hi Tim, Able to quote me for HDB 5room (120sqm), looking at system 4 (all brands that you carry), with options of 1 or 2 CU. And how many trips do your end require for an occupied home? Quote should be inclusive of all costs i.e upgrade of copper pipe, insulation, installation, GST etc2... Wishing u a happy new year and hope to hear from you soon, thanks!