A copy of a Pepco Home Energy Report for Dr. Louie when living in Maryland from Mar 22 – Apr 21, 2016 is attached at the end of this assignment. The total energy use for heating over the 31-day period was 95 kWh (which was 53% lower than other "efficient" homes in the area). Assume the only heat loss is through the insulation along the walls, and there is no movement of air or other flow in or out of the system. The estimated surface area of walls in contact with the outdoor air and indoor air is 560 ft2 . Based on historical records, the average outdoor temperature during this period was around 51 °F. Assume the indoor air temperature was held at an average of 67 °F, and the system is at steady-state. Calculate the R value for the insulation in ft2 ·°F·h/Btu