Slercel brought up in General Discussion a subject I've pondered. The fan units in our Monterey are as noisy or noisier than the propane furnace in our old Pace Arrow. The Aqua Hot burner itself is quiet in its own right, but those darned fan units in each "living area" or zone make quite a racket, esp. when they cycle on during low volume points in a good TV show or movie or when they interupt a conversation.
I've heard there are alternative fan units, but reckon they would still suffer from the same problem of integrated vent and fan. So how come manufacturers don't mount a master fan or individual small fans in a remote insulated part of the basement, and use 2 or 3 inch insulated air lines from a cold air return to each zone vent. The heat exchange could still occur at the vent, or at the fan. It would seem that at least removing the fan aspect from the vent noise would help.
