What do you think about insulating duct work in a house? So far I have talked to two people and of course received two differnt answers. One said it is workwhile to inulate the ducts as it will save money. The other said since the ducts are mor or less in conditioned space it is not really worht it. The house is a two story with basement. The ducts are all in the basement which is half finished. It is always comfortable in the basement as it is always within a few degrees of the thermostat setting. So what say you guys. Worth insulating or not?