Good day Ladies and Gentlemen,
I would like to start this post by thanking the owner for granting me membership so that I can make use of the site and thank you all in advance for you considered responses. I know that this topic has been posted before but want to make sure I am doing the best I can for my home investment and my family.
Now to the particulars, I have purchased a newly constructed home from a developer that ran into some trouble and could not finish the building beyond rough-in condition. The home was built in 2010 and from what I can see was built with high efficiency in mind. The home is 1100 Sq. Ft per level with the first and second floors being finished and the basement level unfinished. From the design documents I can see that the HVAC system was calculated to be 1.5 tons per zone I want to use as much American manufactured equipment as I can. So far I have installed what I believe is called a hydronic heating system. In other words I have installed an Energy Kinetics "system 2000" approx. 130,000 BTU boiler and connected it to two air handlers (one per floor) manufactured by Firstco (model # 18HBXB-HW) along with a 60 gallon Hot water storage tank. They are fueled by a 1000 gal underground propane tank and controlled by a Venstar soft touch 5600 thermostat. So far the system has exceeded my expectations. Also, you should know that the house was built as a "closed" system, I can see that there is no ridge or soffit venting and the entire building envelope is spray foam insulation. I do notice that the second floor is always warmer than the first floor by at least 2 degrees F.
My reason for this post is that I am now looking to install central Air Conditioning and while doing a great deal of research and reading I have come to the conclusion that American Standard seems to have the best service record with the least amount of documented repair issues. But, in trying to keep with my higher efficiency mandate, I have run into the problem that AS does not produce a 1.5 ton compressor/condenser unit with two stage scroll compressors. or at least not that I can find. the smallest two stage compressor they produce is a 2 ton unit (model #4a7a6024) and I wanted to know if I should connect the larger tonnage unit and If I do, will I see the peak performance I am looking for, or should I sacrifice the higher seer rating for the single stage compressor of the gold unit (model #4a7a5018) and match the 1.5 ton rating? If I have left out any pertinent information please don't hesitate to ask me for any additional information you may require.