Passive building techniques have been employed to create durable, comfortable and energy efficient buildings since the 1970’s. One benefit that has become of recent interest in the thermal resilience of the building; its ability to maintain livable conditions inside with passive measures. With projected increases in extreme weather events, and recent cases of instability in the electric grid while building space conditioning systems electrify, thermal resilience becomes a value benefit to building occupants and owners. Recent historic outage events have occurred during severe weather conditions such as the February 2021 cold snap in Austin, Texas and the June 2021 heat dome in the Pacific Northwest, have occurred during severe weather conditions and have resulted in damage to property, injury and loss of life.