Different Brands & Install
I read Many comments here about the superiority of this brand or that brand. First any hvac unit manufactured in the USA will give decent service if properly sized and installed. All units use secondary products such as relays, capacitors, gas valves, motors, printed board assemblies made by a few manufactures such as Honeywell, Robert Shaw, GE, Steveco, and Fasco to mention a few. These companies do not make inferior parts for one company and super stuff for another. All are supplied equal quality stuff. Regardless of who makes or supplies certain accessory parts, in each lot produced a certain number are going to fail. This even happens to stuff produced for NASA and the quality control required by NASA is as stringent as any on the planet. When an HVAC unit is purchased whether one gets a unit with one of these destined to fail parts is determined by luck nothing else. Now any unit hacked in or wrongly sized for the application is not going to give good service regardless of the brand. Some makers use heavier sheet metal and have fancier paint jobs, advertise heavier, sell only thru franchised dealers. With one of these units there is much greater chance one will get a proper size selection and good install. Other companies sell over the internet, through outlets to anyone with the cash to buy, spend little on advertising, as a result many are purchased by unqualified people. In many instances the units are wrongly sized, poorly installed and of course trouble results and hence these brands get bad mouthed. In Finishing let me say be a lot more concerned about the installer, someone properly qualified to make size selection & warranty terms than name plate on the sheet metal.Find out about charges for trip fees and such, even with a 100% warranty, things like these can provide a nasty finiancial surprise.