I have been having sky-high power bills for the last two winters - about $5000 for the six months. (Seattle) I have tried everything, audits, insulation, new roof, check the furnace and heat pump, etc. Finally I had someone look at the ductwork in the crawlspace. There were a handful of large leaks, and also the duct to one room was completely detached, so the heat just poured into the crawlspace. I am wondering if these by themselves would explain the high bills. I know this is not something you can really measure, but for folks who have dealt with duct leaks, does anyone have a feel for how much extra $$ my leaks might have cost me? If it sounds like not enough to explain the bills, then I will keep on searching for other causes during the summer. Thanks!