North outdoor temperatures (blue; Hobo 23) are shown in combination with living room temperatures (Hobos 2, 3, 6, 7, and 24) before and after brick installation. Hobo 7, on the piano top, recorded warmer temperatures than the others, consistent with its much higher elevation of 4’6”.

Following brick addition, peak interior temperatures continued to coincide with peak exterior temperatures, but interior lows were delayed by approx. 4 hours, compared to exterior lows, on March 12-15. Noticeable smoothing of interior temperature peaks and valleys was also observed, particularly on March 14 and 15.