We're going to build a 12' x 16' separate guest room in our back yard. It will have 2x6" frame construction, a simple peaked roof, and insulated double-pane windows. It will be used mostly when family comes to visit for two weeks in the summer and at Christmas and other shorter holidays. What's the least expensive type of heating and cooling unit that will keep them comfortable with our hot summers and wet winters?
50-year old home in Denver, Colorado, is of 2 x 4" frame construction, and has eight single pane windows. What expenditure will improve my utility costs more--having the walls and attic pumped with insulation or replacing the windows with good vinyl double-pane windows?
Some double pane wood windows in the Greensboro, South Carolina home that we built in 1985 have started to leak air. What is the expected life of today's ENERGY STAR replacement vinyl windows?