Effect of thermal mass on performance of insulated building walls and the concept of energy savings potential

► Relations between Lmas,cr and energy savings potential (Δ) are obtained. ► Lmas,cr increases with increasing Δ. ► For given Lmas, cooling and heating energy-savings potentials are same. ► For Δ in the range 70-99%, Lmas,cr ranges between 6 and 30 cm. ► Savings in loads are about 17% for cooling and 35% for heating.