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Last week, I had an audit of our house's energy use done and I wanted to share a few impressions of the process.  Partly I hope to inspire a few readers to do the same, and partly I figure some of my readers know a lot more about this than me and can answer some of my questions.  The audit was performed by Jon Harrod of Snug Planet, a local energy efficiency firm here in the Ithaca area of upstate New York. For background, our house is a Victorian farmhouse from either 1850 or 1870 (we heard both in the sales process) and has about 2100 sq ft of floor area.  It's stud construction and sits on a vented stone basement with a part dirt/part concrete floor which is always damp at best, and often with standing water after rain.  A first round of energy efficiency improvements in the 1980s had seen the walls insulated (probably with blown in cellulose), about six inches of cellulose blown into the attic, and fiberglass installed between the ground floor joists.  Most of the windows are the original single pane Victorian casements (and are obviously drafty) but some have been replaced with double-paned windows probably in the 1960s. Since my family bought it early last year, we've done very little beyond some cosmetic things (refinish the floors, some paint) - we've mostly been focussed on just getting settled in.  The main energy-relevant thing we did right away was to replace the coal stove we inherited from the previous owners with a modern wood stove (Lopi Endeavour).  Wood is our primary form of heat, but the house also has electric heating which kicks in when it's colder, especially in the peripheral areas of the house where the heat from the wood stove tends not to reach as well.  I also put a dehumidifier in the basement since all the floor joists, plumbing etc were dripping water down there constantly - it was clear the basement was pretty much always at 100% relative humidity year round, and about the bottom 1/4-1/2" of the floor joists were rotten as a