This book discusses the inter-seasonal thermal storage integrated with a ground-coupled heat pump and unglazed solar collectors for the heating and cooling of residential buildings. It presents technicality and practicality of the system using proto-type and simulations. The financial viability was assessed by using life cycle cost analysis. The proposed system was found to be workable in Melbourne climatic conditions and there are no major issues with the installation and operation of the proposed system. The unglazed solar collector was able to charge with both heat and coolth.