I have a 1600sf home with a roof-mounted central air unit that I've had to gut all the duct work and now have a completely exposed unit (in essence, a "blank canvass") to re-do my duct work. I was planning on well-sealed / insulated work but I've been wondering if it is possible to implement a "zone system" into this unit since I now have all the access I'd ever need. I'm thinking I'd like to heat / cool the bedrooms at night but not the large living space and vice-versa during the day.
My thinking is that it may not work because of several problems:
1. I'd need two different thermostats so that the unit will know when it's attained the proper temp in each zone --and running the unit to cool BOTH zones may also pose a problem as the two thermostats would argue with each other.
2. I will need individual returns from each zone.
3. Since the unit is designed for the entire house, it may be over-sized for the smaller zone system.
Still, I hate the fact that I'm rarely needing to heat / cool the entire house all at once! Now, I can close the registers to each bedroom and just cover the front living spaces since the thermostat is in a central location there but that still doesn't solve the problem of what to do when we all go to bed!
Any ideas or am I just going to have to settle for what I have?