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dirty sock syndrome with gas heat?
I have a customer that has a home with gas, forced air heat. Recently the home smells musky even in the middle of winter with reasonable humidity levels (40%) and the furnace, which was verified with a combustion test to be operating safely. As soon as you walk into the home you smell a musky odor that is like a dirty sock syndrome, even though the home is heated with a non condensing draft induced furnace. The furnace, and water heater which are located in the same area, do not seem to smell of this odor at all, and I have checked all plumbing traps, and floor drains, and they are all primed. I have also checked the dryer vent for obstructions. There is no signs of moisture, on the walls floors, etc. I know that odors, along with noises are extremely hard to diagnose on site, and are even harder over a forum such as this. I was posting to see if any one else had every come across this condition, and what was their course of action was. Any ideas would be much appreciated. If it helps the house is located on a non wooded lot, was built in 1970, and is brick with some siding.Thanks to all.