I have a situation with my ductwork I need help with. One problem is with the main trunk. It runs the length of the house from the heater under the kitchen and into a crawl space under the family room. Whenever you walk from the kitchen into the family room, it sounds like someone is hitting a bass drum. Is there anyway to keep the ductwork from resonating ? Also, in one upstairs bedroom, when you walk over the floor where the duct runs to the in-floor heater, it squeeks. Is there any way to fix that without removing the ceiling in the room below. Any input would be greatly appreciated.