Great thread
To expand the topic a bit, my biggest problem is the summer heat...
Aside from the built-in air vent / soffit setup, would it be beneficial to install an exhaust fan and inlet? I recall seeing one years ago that was hooked to a thermostat.
Also, do any new homes have attic fans anymore?
Last item: when it's hot on the second floor, I usually run the bathroom fans to pull the hot air out and let the cooler air from the A/C sink (the top floor ducts run through the attic and exit through the ceiling). The fans have a decent CFM rating (forget the number at the moment). The exhaust essentially looks like a dryer hose sticking out of the attic space. Is there a benefit vs. cost to this practice?
The house design is a traditional rectangle-on-rectangle 2 story (no level splits).
RH77