First post (to this forum at least) and I have educated myself significantly over the last few weeks. Big thanks to all of you folks that help the rest of us out.
We're in the middle stages of a major, whole house renovation of a house in Chapel Hill, NC. We plan on being in the house 10-15 years so we are really focusing on trying to do things right from a quality perspective and not always let budget dictate the decision.
The completed house will be a ranch with a finished basement plus a MBR over the garage. Sq footage is approximately 2235 up and 1731 down in the basement. The basement is mostly underground with only one wall allowing for walkout. We are replacing all windows with highly efficient ones and are planning on spray foam insulation for the main floor. It's TBD whether the attic is a conditioned space or not. All ductwork is new as is all HVAC. This house was completely gutted and will pretty much be completely new from the foundation out.
We've received quite a few quotes for the HVAC and have settled upon a company who has quoted us heat pumps from American Standard as part of a matched system with VS blowers on the indoor air handlers and dual zone for the MBR over the garage. Thermostats are the 8000 series by Honeywell. They also will install an outside air duct and damper system for ventilation due to the spray foam insulation.
First quote was for a 3 ton system (Heritage 18) upstairs and a 1.5 ton system downstairs (Heritage 15). At first glance i thought that was a bit overkill so I asked for a quote for the exact same setup except with the Heritage 16 up and the Heritage 14 down and the price was only about $1000 different between the two.
So, my questions:
1. I understand SEER but also from reading here see that EER is the more important value. Anyone know where i can find the EER values for AS?
2. For the mostly negligible price difference, what would you do? I'm not against spending the extra $$$ but am nervous about oversizing the system. I just don't want to assume that bigger is always better.
3. Thoughts on making the attic a conditioned space?
For those of you that live in the South, you know that humidity control is very important and since we're replacing everything, I don't want a humid house. It also doesn't get that cold here so i would think my biggest concern is humidity.
Any comments are appreciated, i'm an electrical engineer and am astounded by the many different options available with HVAC today. Hats off to you guys that can keep up with it. ;-)
I appreciate it.