New const - Cost of zoned ducts
We are in the process of building a new 2-story house and I'm struggling with some HVAC options. The builder-selected HVAC sub offers a few options for a zoned system:
Honeywell 2-zone system
Honeywell 2-zone system - duct work only
The cost of the duct only option is just under $2000, while the full system is over twice as much. My questions are around the cost. From my understanding you can add zoning to a system by adding electronic dampers to all the branches coming off the main trunk. Why would they be charging nearly $2000 for duct work? This price doesn't include any dampers or control panels.
My plan is to have then do just the basics (including running control wires up to the second floor for an additional thermostat) and then add the dampers, control panel and thermostat later. Should I pay the money for them to install a zoned duct system, or just go with the basic single zone duct system?
We will have an unfinished basement and are selecting Lennox EL296V 96% 2-stage gas furnace and a Lennox 13 SEER 13ACX air conditioner.
Thanks for your help!