"Focus on the contractor/installer first, brand second. The 'Best' brand out there can be installed poorly, which will result in inferior performance.
Choose a company that will conduct a thorough inspection of what you have or what you need. They should size the equipment properly and present you with an assortment of options.
They will provide a written proposal, install the equipment using proper methods, and stand behind their work with a written warranty."
Green Box Heating & Air