The goal of the study was to create a prototype leisure home in Norway that stays frost-free without using primary energy sources. The researchers developed a model that uses active solar heating to store heat in the ground during sunny periods, which can then be released to keep the home warm during cold times. They used a simulation tool to model the interactions between the building and the ground, focusing on heat transfer. The researchers found that by injecting electric heat into the basement floor based on solar radiation data, they could maintain frost-proof conditions in the leisure home without relying on traditional energy sources.