So, mfglickman's recent thread about her ca.1758 house pushed me to get around to something I'd been meaning to do for some time, and the weather this week was perfect for it: thermal imaging of our ca.1773 house. The house was built in three parts, the oldest and largest being built between 1773 and 1779, a kitchen addition in 1894, and a family room and garage addition in 1994. That last addition tied what was left of the original summer kitchen to the main house, and is entirely open to the 1894 addition. On the first floor where the stoves are installed, the two additions make up one heating zone (whether we're talking oil or wood), and the original 1773 portion is a separate zone. The 1773 portion of the house (majority of the house) is 18" stone walls with plaster applied directly to the walls. No insulation, aside from the R-value of stone, although the mass acts like a giant capacitor. The 1894 kitchen appears to be poorly insulated framed walls, possibly balloon framing later modified by the installation of a master bath suite in the second floor of this addition. The 1994 addition is modern construction, very high end materials, but lots and lots of windows. Each of my stoves sits in an old cooking fireplace, 18" thick stone on three sides, the rear wall being exterior in both cases. The location of the fireplaces will be obvious in the photos of the exterior, as a good bit of heat telegraphs to the outside. The stove in the 1994 wing sits maybe 12" from the rear wall, but the stove in the 1773 wing sits only 3" from the wall. This morning, I was forced to let both stoves go out for the first time in a while. When I came home 12 hours later, I found the new (read: "well-insulated") part of the house sitting at the thermostat's set point of 62F, with the oil furnace working to keep it warm. The old (read: "un-insulated stone") part of the house was at 66F - 70F, and shooting the IR gun at the walls revealed the stone walls all around the wood stove were still holding 79 - 80F. That's the back story. Next installment... images!