One of humanity’s most significant and ongoing threats today is global climate change and its impact on the environment. While numerous factors account for this overbearing problem, buildings, an essential element of our society, account for 40% of the total global energy consumption while also emitting harmful greenhouse gases. Hence, the concept of net-zero energy buildings has gained relevance in the ongoing climate change debate. The development and usage of sustainable, affordable, and efficient technologies like phase change materials are imperative to improve energy efficiency in buildings. This paper presents the validation of a TRNSYS model to emphasize how PCMs as sensible heat storage devices can lead to a reduction in heating and cooling loads in a building, providing thermal stability and comfort within the building. The paper further discusses the major challenges posed by the phase change material, including its geometry, encapsulation, and low thermal conductivity.