I'm having a home built by a production builder and I have the option
to purchase a dual-zone HVAC system.
It's a 3 story (finished underground basement) home with about 2,800'
on the main and upper level.
I'm in the Wash, D.C. area so the weather changes year-round.
The finished basement and the main level have open floor plans so it's
kind of like having one big room on those levels.
The upper level has 5 bedrooms including a 400' master bedroom.
Is the dual-zone necessary or will I be wasting my money?
I also have the option to have an attic fan installed for $350; is it
worth it and what's the potential for leaks?