Part 2/8:
Ferrell notes that traditional American building practices often utilize subpar materials, such as thin sheathing that inadequately protects homes from the elements. In contrast, he has chosen to implement high-performance features like factory-built walls with cellulose insulation, triple-paned tilt-and-turn windows, geothermal heating and cooling systems, and a heat pump for water heating—all considered standard in various parts of Europe.