My problem is an eerie sound emitting from my duct work that is within my concrete slab. When the furnace starts blowing warm air through the duct work, I believe the 10 round duct work expands and contracts sounding like there is a woodchuck trapped under my floor trying to chew its way out.
My split entry home is located in Wisconsin where we do have cold winters. The furnace is a Lennox Pulse distributing heat through conventional duct work in the upper portion of the house, but in the walk out basement where there are two bedrooms and a bath that receive there heat from the duct work that was buried under the concrete slab. The routing of the duct work travels approximately 15 from the furnace (with on opening to supply heat to the bathroom) then goes into a tee with each run (one left/one right) to each of bedrooms that are approximately 10 from the tee in both directions.
The contractor is no longer in business that installed the system and this was the first hybrid system that utilized conventional ducting with in ground ducts. I need to resolve this situation as my eight year old granddaughter is sacred to sleep in the bedroom with sounds being made from the creature from beneath.
Are there options anything short of jack hammering the floor? My friend has this same setup, but instead of using a metal duct, his ductwork is PVC that doesnt creak in the middle of the night.