I'm in the process of having a new home built by Ryan Homes. Unfortunately, I have very little control on the equipment they're installing, which happens to be a dual zone Janitrol gas heating and A/C system. I would have preferred Trane (my favorite HVAC brand), but according to Ryan they simply can't make that change.
Anyway, I'd like to add an Aprilaire whole house humidifier, Honeywell Air Cleaner, Honeywell programable HVAC controls, and run ducts into the unfinished attic for future expansion purposes.
Since I don't actually own the house yet, is it considered unethical to contact the HVAC subcontractor and try to arrange this prior to closing? My primary reason for doing this is that I believe some of these items would be easier to install while the house is under construction—especially the duct work.
Any advice is greatly appreciated.