Dual-zone and an Attic Fan

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?
Thanks,
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Always should get all options available...

Pretty much a simple fucking cottage then...

Unique geography--what with the weather being more or less stable everyplace else in the world....

A piss-poor design, IOW

And your worried about $350 for an atttic fan...

You've been wasting money all along....but now when it comes to the part about significant long term saving in heating costs...
What a fucking idiot.

--





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Get two independent systems, one for the upstairs and one for the main floor and basement. Make sure they are sized properly. Not really much more expensive than zoning a single larger system and simpler. Plus when one breaks you still have heat/ac in part of the house.
Get a gable mounted attic fan. No leaks.

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I see a man bent-over with his ass-cheeks pulled wide open!
I'll bet your builder kisses you when it is all done and paid-for!
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Hey Mark, another job for you LOL !
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