New house is about a week away from HVAC rough in. Had planned on a 5 ton Trane XL19, XV90 3 zone system. The other option had been 2 separate systems. My contractor has been great until this week. It has taken several days to get a return call to set up a time for the rep to go onsite to plan the rough in.
It appears that the original rep who was to handle the rough in planning has had an illness in the family and I am now going to deal with a new rep.
I finally got a call from the substitute rep who will be planning my install. I asked him some final questions about zones, register locations, etc. and got some very perfunctory answers. I told him I had the Man J calculation and also a report that shows the loads for each zone. He had no interest (said "I determine loads by square feet and ceiling height"). The onsite foreman said the rep came by for about 10 minutes, discussed the attic access and marked the registers on the foundation and then left.
I am concerned that all my time spent investigating and learning on this iste may be wasted if a poorly (or hastily) planned and executed installation goes ahead.
At this point I plan on trying to speak to the owner Monday about my concerns, including asking for the details and support for the duct and register plan. If I can't get some good feeling that the install will be properly planned I am thinking about opting for the 2 system approach, thinking that might be easier to get right than a zoned system.
Are my concerns legitimate, and can you suggest some questions I might pose to the owner on Monday?
Thanks for your assistance.