My Comfortmaker system was installed and two in line fans were added to boost the output to one room. The fans were wired to an always on AC connection and as far as I can tell have both burned out over time. I am about to replace them and I see two options - hook them to an AC line that receives power when the furnace is running or hook them to duct stats. My preference is to do the first because it is cleaner, less things to go wrong. I cannot find any documentation on my furnace so I was wondering if anyone had any links to information that will help me figure out if there is a switched 110v coming off the furnace for running accessories? Thanks.