Thanks for the info, and thanks for bringing the job to completion. Marty and Marcel took care of business, and were happy campers. It was too cold (below 45 F) for the heat pump to fire, but I'll wait for a warmer day and keep an eye on it. The 7 inc. pipe solution hasn't proved itself yet, but we'll play with reducing the size of the return air in that room (as Marty suggested) and see what happens. Neat thermostat, I'm looking forward to making friends with it.
Pat & Toni
Took care of business, and were happy campers