I think when palms die from overwatering/root rot (at least some of them, anyway), they tend to die from the inside out, as in roots rot causing the "heart" and crown to die first, then any new emerging fronds will die, and finally the outer older fronds die last.
With the outer/older fronds dieing, but new growth still being ok, that indicates some other issue to me. Underwatering could be an issue, but you'd have to be letting it get really dry in between waterings for that to be the problem. Humidity (lack of) could also be an issue causing the older leaves to die sooner than they normally would. It could be a combination of the two. If you Mass. apt is very hot at this time of year, that means you must be running the heat a lot. While the palm will appreciate the warmth, it won't appreciate the excessively dry air caused by the heating. Lighting could also be an issue if it's not kept in strong enough light.
Try watering so that the soil stays slightly moist, but not wet. You can let the soil get almost dry before watering, but not completely dry. As for humidity, you could try misting or spritzing the fronds with a spray bottle at least several times a day. I've heard conflicting stories on how well that works, but I would imagine it would be beneficial if you did it enough times throughout the day.