The loudest place in the house is above the kitchen table... quote from tumbush.
I assume you only hear this noise when the supply fan in your air handler is on.
Is your return air grille (2 ft X 2 ft approx) located in your ceiling near the kitchen or low on a wall? Also is your air handler in the garage?
If your primary return air grille is in the ceiling the sound could be emanating from your air handler. if this is the case you would also hear the noise right at your air handler, if in garage you wd have to be near it. If there is no abnormal sound from the air handler/supply fan then maybe you have a few supply diffussers or volume dampers installed improperly that are vibrating when the fan is on.
Still curious, are the newer house's HVAC systems installed with heat pump capability?
|