Overview: The day begins with the crew moving the old milk shed to another spot on the property. Inside, Richard Trethewey has done an energy audit and determined that, with the addition of a stand-by hot water tank, the current heating plant is sufficient to handle the needs of the new addition. Architect Chris Dallmus reviews with the Maitlands the many design ideas they mulled before deciding on the addition's final layout. The need for the addition results from the lack of usable space in the original house. To illustrate the space-eating effect of the large central chimney, our host visits Minuteman National Historical Park and tours a ""naked"" chimney stack with hisorical architect Larry Sorli.