The Right Contractor
My advise about choosing the right contractor is simple, just call us. However you will call on some other contractors so the problem becomes who you can trust and trying to understand all the technical terms that you are not familiar with. I suggest that you make sure whoever you hire uses computer load calculations, understands Manual D duct design (and if they haven't heard of it best you move to the next one) and they take all the necessary steps to make sure your system will be dependable and provide years of trouble free operation. There are necessary procedures that must be done when replacing an air conditioning unit or a furnace for that matter and unfortunately we see these not being done by contractors in many cases.
Chosing your Equipment
So you are getting estimates on replacing that old air conditioner, maybe an old furnace and coil, or all of the above. When it comes to choosing a brand of course we think it should be Trane as we are a Trane Comfort Specialist. There really is a lot of good equipment, such as Carrier, Day & Night, Goodman, Rheem, etc and some bad. With all my years of experience I believe Trane is one of the best for its durability, design, support and for those who demand the best the Trane 20 SEER Variable Speed condenser with 700 Stages of cooling is second to none.
Computer Load Calculations
Computer load calculations and duct design are a necessary tool in designing today's HVAC system. The day of "rules of thumb" and guessing are a thing of the past for some contractors while many still do not utilize these tools.
It is not only just about choosing the right equipment for your project but also the right tonnage of your air conditioning unit. A properly sized unit will offer an additional energy savings as well as increased comfort by eliminating annoying temperature swings.
So you are going to install a new HVAC system and one of the most important aspects of this is the duct work. Once you have chosen your equipment now you must make sure that the duct system is adequate and properly sized. Without proper sizing the capacity of your equipment will be reduced. There must be proper air flow to maintain 100% capacity. Many contractors do not understand proper duct sizing and we see it all the time especially in track homes built in the 1980's and the 1990's with grossly undersized duct systems in an attempt to save money. Improper duct sizing also contributes to imbalances from one room to another or one floor to another.