I'm building a new house in Kansas City. My HVAC guy wants me to choose a system and there are so many options I'm having a hard time selecting the best ones for my situation.
First, here are some details about the house: It is a reverse 1 1/2 story... It has 2000 sq ft on the main level with 2 bedrooms (master and guest), kitchen, dining room, 2 baths, laundry roomk, hearth room, and garage. The lower level is 1200 sq ft and has two bedrooms (one of which I'll use as an office), rec room, and bath. The staircase to the lower level is open (not behind a door) and the lower level walks out to the back yard. All windows are Andersen 200 series double pane, Low E and doors are likewise, Andersen.
My main concern is keeping the temperature balanced between the upper level and lower level. I work from home and will be using one of the downstairs bedrooms for my office. Therefore, I'll be downstairs all day working and I want it to be warm. I don't think cooling will be as big of an issue so I am primarily focusing on the heating. Coldest winters temperatures here are generally in the teens but can on rare occasions go into the single digits.
When I originally talked to the HVAC guy we were going to go with a 80% variable speed heat pump with electronic damper-controlled zoning (5 ton, 5x system). However, he called me back to say he reconsidered and thinks a 95% 2 stage variable speed and no zoning is the better way to go. Both options would be about the same price.
So, here are my questions...
1) If my main goal is to make sure I have even heat throughout the house, and I'm not as concerned with it costing a bit more in my utility bills, am I better off with the zoning or using the 2-stage variable speed fan?
2) Do I really need 95% efficiency? My system will be electric with a natural gas backup so I won't be using the gas that much. Any reason I shouldn't just go with something a bit less efficient and cheaper ... maybe 90% for instance? (I'm over on my building budget, of course, so want the best bang for my buck!)
Any recommendations out there?
Thanks in advance....
Brenda in Kansas City