I'm getting bids on a 4 ton furnace that will be in a utility closet in a finished basement. I'm looking for the quietest possible unit. I'm looking to hear from owners/installers that have experience with the Rheem/Ruud modulating or the Carrier Infinity 96 (also marketed by Bryan, apparently) furnaces.
I'm in Portland, Oregon with fairly mild winters. Should I assume that any two-stage or modulating furnace will be operating at a low speed, for the most part?